CA2167038C - Low profile hardwood flooring strip and method of manufacture - Google Patents

Low profile hardwood flooring strip and method of manufacture Download PDF

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Publication number
CA2167038C
CA2167038C CA002167038A CA2167038A CA2167038C CA 2167038 C CA2167038 C CA 2167038C CA 002167038 A CA002167038 A CA 002167038A CA 2167038 A CA2167038 A CA 2167038A CA 2167038 C CA2167038 C CA 2167038C
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CA
Canada
Prior art keywords
blank
cut
saw blades
width
thickness
Prior art date
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Expired - Fee Related
Application number
CA002167038A
Other languages
French (fr)
Other versions
CA2167038A1 (en
Inventor
Darl J. Bolyard
James E. Price
Dicky Ray Welch
Gerhard Henn
Jurgen Petzold
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Triangle Pacific Corp
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Triangle Pacific Corp
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Anticipated expiration legal-status Critical
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D45/00Sawing machines or sawing devices with circular saw blades or with friction saw discs
    • B23D45/10Sawing machines or sawing devices with circular saw blades or with friction saw discs with a plurality of circular saw blades
    • B23D45/105Sawing machines or sawing devices with circular saw blades or with friction saw discs with a plurality of circular saw blades operating within the same plane
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27BSAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B31/00Arrangements for conveying, loading, turning, adjusting, or discharging the log or timber, specially designed for saw mills or sawing machines
    • B27B31/08Discharging equipment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27GACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/08Accessories for keeping open the saw kerf, e.g. riving knives or wedge plates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27MWORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M3/00Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/04Manufacture or reconditioning of specific semi-finished or finished articles of flooring elements, e.g. parqueting blocks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28DWORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/046Sawing in a plane parallel to the work table
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/16Two dimensionally sectional layer
    • Y10T428/163Next to unitary web or sheet of equal or greater extent
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31971Of carbohydrate
    • Y10T428/31989Of wood

Abstract

A method of producing a hardwood flooring product, including the steps of processing a strip of raw wood into a blank having a predetermined thickness and width, and top and bottom surfaces defining parallel planes relative to each other, and splitting the blank along the width of the blank from one side to the other to form two low profile flooring strips having the same width as the blank and a thickness less than one-half the thickness of the blank. The splitting step includes the steps of providing first and second circular saw blades mounted on spaced-apart vertical axes for rotation in a single plane intermediate and parallel to the planes of the top and bottom surfaces of the blank and positioning the blank on conveying means upstream from the saw blades with the plane of rotation of the saw blades intermediate and parallel to the planes of the top and bottom surfaces of the blank for movement of the blank from an upstream position to a downstream position relative to the saw blades. The blank is moved downstream into the plane of rotation of the saw blades during rotation of the saw blades thereby horizontally splitting the blank to form first and second low-profile flooring strips.
Interlocking members, such as molded, mating tongue and groove members, are molded into first and second longitudinally-extending side edges of the flooring strips for securing together the flooring strips when placed side-to-side to form a floor.

Description

LOW PROFILE HARDWOOD FLOORING STRIP AND METHOD OF MANUFACTURE
Technical Field and Background of the Invention This invention relates to a low profile hardwood flooring strip and its method of manufacture. The end product resulting from the processes described below is a hardwood flooring strip having a nominal thickness of 5/16" and a nominal width of either 2 1/4 or 3 1/4". The strips are intended to be sold as a prefinished "nail-down" product. After installation, the product is indistinguishable from a conventional 3/4" inch-thick hardwood flooring product of like width. However, the lower profile offers a number of substantial advantages. First, because almost twice the floor coverage can be achieved with the same amount of wood, very substantial savings in wood resources are possible.
When installed as a aftermarket product to replace an existing floor, the low profile permits installation over a floor where conventional carpet and padding was previously installed without the need to raise door bottoms or provide transitions between the new hardwood floor and adjacent flooring of other types. This results in very substantial labor savings.
Prior art methods of producing low profile wood flooring include simply planing down full-thickness boards with a substantial amount of resulting waste sawdust and very little actual saving in the wood used. The prior art also includes cutting over-thickness boards, typically with a thickness of approximately 1.25", widthwise with a bandsaw. A bandsaw-cut board ~~~'~0~~
has a very uneven cut surface which cannot be used even on the hidden surface of the board without substantial further planing.
Both prior art processes are relatively slow, produce a relatively low quality product, and create bottlenecks in automated production lines which require high processing speeds. Prior art processes have not provided a means of precisely controlling the positioning of the blank from which the strip of flooring is produced, where the wood is sufficiently thin at the beginning of the process to provide significant savings in material and waste. The present method uses the same full thickness stock material used to produce conventional full thickness flooring, thus permitting the same production line to be used up to the splitting process itself.
In the present process counterrotating saw blades are used to "split" hardwood flooring material into very high quality low profile f loaring strips at rates which are compatible with processing speeds of the other manufacturing processes, such as planing. This is accomplished by very precisely controlling the position of the wood blank before, during and after the splitting process. The result is a prefinished floor manufactured to extremely close tolerances, and with square edges which fit f lush in the same manner as "sand-in-place" flooring.
Summary of the Invention Therefore, it is an object of the invention to provide a method of manufacturing a low profile hardwood flooring strip.

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It is another obj ect of the invention to provide a method of manufacturing a low profile hardwood flooring strip which saves a considerable quantity of wood in contrast to full thickness hardwood floors and prior art low profile methods.
It is another obj ect of the invention to provide a method of manufacturing a low profile hardwood flooring strip which operates at a high speed production rate compatible with other steps in the manufacturing process.
It is another obj ect of the invention to provide a method of manufacturing a low profile hardwood flooring strip which can be installed in place of an existing floor, such as a carpet, without raising door bottoms or transitioning to adjacent floorings.
It is another obj ect of the invention to provide a method of manufacturing a low profile hardwood flooring strip which results in a floor which in indistinguishable from a full thickness floor after installation.
It is another object of the invention to provide a low profile hardwood flooring strip of precise and uniform dimension.
These and other objects of the present invention are achieved in the preferred embodiments disclosed below by providing a method of producing a hardwood flooring product, comprising the steps of processing a strip of raw wood into a blank having a predetermined thickness and width, and top and bottom surfaces defining parallel planes relative to each other and splitting the blank along width from one side to the other to form two low profile flooring strips having the same width as the blank and a thickness less than one-:half the thickness of the blank. The splitting step compri~;es the steps of providing first and second circular saw blades mounted on spaced-apart vertical axes for rotation in a ~;i.ngle plane intermediate and parallel to the planes of the top and bottom surfaces of the blank and positioning the blank on conveying means upstream from the saw blades with the plane of rotation of the saw blades intermediate a.nd parall.e:1 to the planes of the top and bottom surfaces of t:he blank for movement of the blank from an upstream position to a downstream position relative to the saw blades. The blank is moved downstream into the plane of rotation of the saw blades during rotation of the saw blades thereby horizontally sp:Litting the blank to form first and second low-profile flooring strips. In one embodiment, interlocking members, such as mating tongue and groove members, are molded into first and second longitudinally-extending side edges of the flooring strips for securing together flooring strips placed side-to-side to form a floor.
An embodiment of the method according to the invention includes the step of counterrotating the saw blades in a direction wherein both first and second saw blades cut into the wood in the upstream direction against the downstream direction of travel of the blank.

According to another preferred embodiment of the invention, the step of providing first and second saw blades includes the step of positioning the first saw blade upstream f rnm Page 4 (a) the second saw blade whereby the first saw blade begins its cut before the second saw blade begins its cut.
According to yet another preferred embodiment of the invention, the first saw blade is positioned upstream from the second saw blade and therefore begins its cut before the second saw blade begins its cut, and wherein both the first and second saw blades are positioned relative to the path of travel of the blank to cut into the blank more than one-half the distance of the width of the blank.
According to yet another preferred embodiment of the invention, the cutting thickness of the first and second saw blades, and thus the cutting waste of the splitting process, is more than 10 percent and less than 20 percent of the thickness of the blank.
According to yet another preferred embodiment of the invention, the method includes the step of increasing the width of the cut in the blank immediately downstream from the first and second saw blades to prevent the blank from pinching the rotating blades.
According to yet another preferred embodiment of the invention, the step of increasing the width of the cut in the blank comprises the step of introducing a plate into the area of the cut in the blank, the plate having a thickness sufficient to increase the width of the cut and thereby spread apart the blank on opposite sides of the cut.

....,.
According to yet another preferred embodiment of the invention, the step of increasing the width of the cut in the blank comprises the step of introducing first and second opposed plates into the area of the cut in the blank from opposite sides of the blank, each of the first and second plates having a thickness sufficient to increase the width of the cut and thereby spread apart the blank on opposite sides of the cut.
According to yet another preferred embodiment of the invention, the method includes the step of applying pressure to the top surface of the blank before, during and after the saw blades cut the blank.
A preferred hardwood flooring product is also disclosed, and is made according to a method comprising the steps of processing a strip of raw wood into a blank having a predetermined thickness and width, and top and bottom surfaces defining parallel planes relative to each other and splitting the blank along the width of the blank from one side to the other to form two low profile flooring strips having the same width as the blank and a thickness less than one-half the thickness of the blank. The splitting step comprises the steps of providing first and second circular saw blades mounted on spaced-apart vertical axes for rotation in a single plane intermediate and parallel to the planes of the top and bottom surfaces of the blank and positioning the blank on conveying means upstream from the saw blades with the plane of rotation of the saw blades intermediate and parallel to the planes of the top and bottom surfaces of the blank for movement of the blank from a:n upstream position to a downstream position relai~ive to the saw blades. The blank is moved downstream into the plane of rotation of the saw blades during rotation of the saw blades thereby horizontally splitting the blank to form first and. second low-profile flooring strips.
In one embodiment, int:e:rlocking means are molded into first and second longitudinally-extending side edges of the flooring strips for securing together flooring strips placed side-to-side to form a floor.
The product <~ccording to a preferred embodiment of the invention is made according to a method which includes the step of counterrotating the saw blades in a direction wherein both first and second :yaw blades cut into the wood in the upstream direction against the downstream direction of travel of the blank.
According to another preferred embodiment of the invention, the step of providing first and second saw blades includes the step of positioning the first saw blade upstream from the second saw blade whereby the first saw blade begins its cut before the second saw blade begins its cut.
According to yet another preferred embodiment of the invention, the first saw blade is positioned upstream from the second saw blade and therefore begins its cut before the second saw blade begins it:s cut, and wherein both the first and second saw blades are positioned relative to the path of travel of the blank to cut into the blank more than one-half Page 7 (a) the distance of the width of the blank.

According to yet another preferred embodiment of the invention, the cutting thickness of the first and second saw blades, and thus the cutting waste of the splitting process, is less than 20 percent of the thickness of the blank.
According to yet another preferred embodiment of the invention, the method includes the step of increasing the width of the cut in the blank immediately downstream from the first and second saw blades to prevent the blank from pinching the rotating blades.
According to yet another preferred embodiment of the invention, the step of increasing the width of the cut in the blank comprises the step of introducing a plate into the area of the cut in the blank, the plate having a thickness sufficient to increase the width of the cut and thereby spread apart the blank on opposite sides of the cut.
According to yet another preferred embodiment of the invention, the step of increasing the width of the cut in the blank comprises the step of introducing first and second opposed plates into the area of the cut in the blank from opposite sides of the blank, each of the first and second plates having a thickness sufficient to increase the width of the cut and thereby spread apart the blank on opposite sides of the cut.
According to yet another preferred embodiment of the invention, the method includes the step of applying pressure to the top surface of the blank before, during and after the saw blades cut the blank.
_ --1577/1 Page g-_ According to yet another embodiment of the invention, a decorative and protective finish is applied to one surface of the flooring strip defined as an exposed surface when installed.
Preferably, the flooring strip is installed with the surface which is split in accordance with the method of the invention face down.
Brief Description of the Drawincts Some of the objects of the invention have been set forth above. Other objects and advantages of the invention will appear as the invention proceeds when taken in conjunction with the following drawings, in which:
Figure 1 is a schematic flow diagram of steps 1-6 of a wood flooring manufacturing process according to the present invention;
Figure 2 is a schematic f low diagram of the molding steps 7A-7F of a wood flooring manufacturing process according to the present invention;
Figure 3 is a schematic flow diagram of post-molding steps 8-11 of a wood flooring manufacturing process according to the present invention;
Figure 4 is a schematic flow diagram of the finishing steps 12A-12K and the post-finishing steps 13-14 of a wood flooring manufacturing process according to the present invention;

~~~'~03~
Figures 5 and 6 are simplified perspective, schematic views of the splitter showing the passage of a wood flooring blank through the splitter;
Figure 7 is a perspective view of a completed low profile flooring strip according to an embodiment of the invention, showing the finished, top surface;
Figure 8 is a perspective view of the opposite side of the low profile flooring strip illustrated in Figure 7, showing the bottom surface having the nailing recesses formed therein; and Figure 9 is a perspective view of a floor assembled from the flooring strips of Figures 7 and 8.
Description of the Preferred Embodiment and Best Mode Referr~.ng now specifically to the drawings, a wood flooring strip manufacturing process which includes a method of splitting a blank into a low profile wooden flooring strip according to the present invention is illustrated in Figures 1-6.
Figures 1-4 set out the process steps in flow-diagram form, while Figures 5 and 6 illustrate in broad form the apparatus which splits the wood blanks into low profile flooring strips. Figures 7, 8 and 9 illustrate a completed flooring strip and assembled floor. The following description of the preferred embodiment and best mode for practicing the method of the invention uses numbered steps for identification which correlate to the sequentially-numbered boxes of Figures 1-4.

~1~~ ~~b Detailed Description of Manufacturinct Process Step 1. Raw oak is delivered to the plant yard for grading, air drying and storage until use. The oak is delivered in lengths of between 4 and 16 feet. Thickness of the raw oak boards is between 15/16" and 1 3/8", with the average being 1 1/8". Width is a minimum of 3". The raw lumber is stacked to promote even ventilation and drying in order to reduce warping, cracking and checking.
Step 2. The wood is dried both by natural ventilation and in drying kilns, using waste wood from the manufacturing process as the fuel for the kilns. Moisture in the wood is reduced down to 60-80.
Step 3. The dried boards are delivered from the kilns to the plant, where they are ripped to width. If the end product is to have a nominal width of 2 1/4" the boards are ripped to 2.531". If the end product is to have a nominal width of 3 1/4" the boards are ripped to 3.531". Tolerances in actual as opposed to nominal dimensions is .002".
Step 4. The boards are delivered by conveyor to a knot sawing table where they are inspected for long splits, gouges, knots or other defects. Sections of boards having these defects are removed.

~~0~03~
step 5. The boards which pass inspection form a "blank" from which the flooring strips will be formed. These blanks are delivered to the splitter, which performs the following sequential functions automatically and without intermediate handling.
Step 5A. The blanks are planed bottom and top, removing .090" from bottom and .008" to .446" from top to a thickness at this point of .839". See Figure 5.
Step 58. The sides of the blanks are planed, reducing the width to 2.495" or 3.495", depending on the final width of the strip. See Figure 5.
Step SC. The blanks are planed bottom and top a second time, .020"
is removed from bottom and .35" is removed from top to a thickness at this point of .785". See Figure 5.
Step 5D. The blanks are then "split" by circular saw blades along a horizontal plane into two identical strips, each 2.495" or 3.495"
wide, and .332" thick. See Figure 6. The difference between .664"
(2 x .332") and .789" is .125"--the thickness of the saw cut and hence the amount of material removed from the thickness of the blank by the blades during splitting. The blades are mounted on vertical axes which are spaced-apart along the direction of travel of the strip through the splitter. The blades counter-rotate into the blank. The blades are spaced only a very small distance apart, so that the cuts actually take place almost simultaneously. The adjustment of the saw blades is sufficiently precise that the cut surfaces of the blank are flush to within a +.004" tolerance.
There are several important factors which permit this result to be achieved. First, the use of two blades running at high speed achieves a minimum amount of overhang of the blades outside the stiffening collars. This enhances accuracy with the use of a thinner blade that would normally require the rigidity of a thicker blade. The fact that there is little overhang also increases blade stability by reducing vibration and heating, thereby creating a smoother, more precise cut which can be more closely registered with the cut of the other blade.
Second, use of a single blade to make the entire cut from one side would require three times the horsepower and would place considerably more stress on the blade. In any event, as precise a cut could not be achieved with a single blade cut, since a blade thin enough to avoid excess cutting waste would inherently flex and vibrate enough to create a rougher, less even cut. The cut side of the strip becomes the bottom of the strip when finished. This results from the fact that the moisture in the center of the wood strip is somewhat higher than adjacent~the outer surfaces. Thus, the center, where the cut is made, becomes the bottom to eliminate cupping in the finished flooring strips.
Adjustment of the cut is made by adjustment of the blades, rather than by adjustment of feed rolls.

~~6~d ~~~
As the cut takes place, the blanks are pushed across the top and bottom, respectively, of a receiver plate which is very slightly thicker that the blade. The receiver plate supports the top strip and prevents its weight from causing it to sag, and keeps the bottom strip firmly positioned on the bed of the splitter.
Therefore, pinching of the cutting blades is prevented, and a smoother, more uniform cut is achieved. Processing speed is between 250 and 300 ft/min.
At this point the strips are properly sized, but have no tongue and grooves on the sides or ends, and have not yet been hollow-backed.
Step 6. When the strips leave the splitter they are passed to a finish knot saw station where knots and other defects through the thinner pieces exposed by splitting are removed.
Step 7. The molding process involves a number of steps which put the strips into a condition suitable for finishing.
Step 7A. The strips are trimmed to their final width of 2.25" or 3.25". The tongue length is also trimmed to a length of .120".
This process will straighten a board with a bow up to .060".
Step 7B. The strips are process~:d through an edge shaper where a portion of the groove is routed into one side of the strip, while the top and bottom portions of the opposite side are routed away to reveal a nearly completed mating tongue. The tongue and groove are formed by cutting one-half of the width of the tongue and groove first, and then the other half. There is a relief of .003" below the face of the board above the tongue which insures the face of each board will butt together tightly when installed. The tongue extends outwardly from the side edge of the strip .120" on the side facing the top surface and .140" on the side facing the bottom surface.
Step 7c. The strips move through a second edge shaper where the remainder of the tongue and the groove is formed. The tongue is .110" thick for extending into the .119" groove. Spacing of the bottom of the tongue to the bottom of the flooring strip is the same as the spacing of the bottom of the groove to the bottom of the flooring strip (.065") thus insuring that the groove side of the strip is held down by the nailed tongue side of the previously installed strip.
Step 7D. The nailing groove is routed into the back side of the strips. It is positioned so that the splinters rupturing from the nail protruding through the bottom of the flooring will be in the groove and not between the strip flooring and the sub floor.
step 7E. The bottom of the strips are planed by removing an additional .020", reducing the thickness of the strips down to .312".

.,""
Step 7F. The back side of the strip is printed with manufacturing data and other necessary information.
Step 8. A groove is routed into one end of each strip for being mated with a complementary groove in an adjacent strip during installation.
Step 9. A mating tongue is shaped onto the other end of the strip by removing the top and bottom edges down to the proper depth. The grooves extend into the strip .140" at the top of the groove and .135" at the bottom of the groove. The groove has a width of .119". The distance from the top surface of the strip to the top of the groove is .111".
The tongues extend outwardly from the side edge of the strip .120" on the side facing the top surface and .140" on the side facing the bottom surface. The tongue is .107" thick for extending into the .125" groove. At this point the profile of ends and sides are completed.
Step 10. The strips are drop-sorted by length, so each grader has a steady flow of strips to be graded. The strips are graded by the type of finish they will receive and are then conveyed to a series of round tables.
Step 11. At the round tables open defects are puttied and all of the unfinished flooring is stacked to go to the finish line.

~1~'~C~3~
Step 12. The strips are conveyed to a finishing line, where they are finished and prepared for shipment to the customer, as follows:
Step 12A. The surface of the strips to be finished is sanded, removing .017" from the thickness of the strip, reducing its thickness prior to application of finish to .295". This is somewhat less than 5/16" (.3125"), which is a "nominal" thickness.
Even so, the product is referred to as a "5/16" product. A small portion of the thickness removed by sanding is added back by the finishing process in the thickness of the sealing and finish coats.
Step 12B. The sanded strips are stained by passing them under a stain-coated roller, and are brushed to even the stain, and force it into the grain.
Step 12C. The strips are passed through a high-mass oven to dry the stain.
Step 12D. The strips are "denibbed" to remove fine wood fibers raised from the surface of the wood by wetting with stain.
Step 12E. A first sealing coat of clear W-curable polyurethane sealer is rolled onto the stained surface of the strips.
Step 12F. The strips are passed through a W chamber, where ultraviolet light partially cures the polyurethane sealer.

~16'~0~8 Step 12G. A second sealing coat of clear W-curable polyurethane sealer is rolled onto the stained surface of the strips.
Step 12H. The strips are passed through a W oven, where the polyethylene coats are completely cured.
Step 12I. The strips are denibbed a second time to remove any raised wood fibers.
Step 12J. First top coats of clear W-curable polyurethane are rolled onto the W sealed and cured surface of the strips. A
second top coat is applied to the first wet top coat.
Step 12R. The strips are passed through a W chamber, where ultraviolet light cures the first and second top coats of polyurethane.
Step 13. The strips are quite hot, since W polymerization is an exothermic reaction. The strips are air-cooled by passing them through a cooling tunnel prior to grading and boxing for shipment.
Step 14. The strips are stacked and arranged into a shipping carton, and the carton is strapped shut. Appropriate paperwork is attached to the carton for inventory and shipping purposes. The manufacturing process is complete.

.' , Description of Splitting Process Referring now to Figures 5 and 6, a simplified illustration of the splitting process described in Step 5, above, is illustrated. As is shown in Figure 5, a blank 10 from the knot sawing step (Step 4) is planed bottom and top by a pair of rotating planing heads 11 and 12. Each of the planing heads il and 12 carry a set of radially, outwardly extending planing blades 11A and 12A, respectively. See Step S,A, above.
The sides of the blank 10 are then planed by left and right planing heads 14 and 15. Each of the planing heads 14 and 15 carry a set of radially, outwardly extending planing blades 14A and 15A, respectively. See Step 5B, above. The various conventional pressure and feed rollers which control the movement of the blank 10 have been removed from Figure 5 for clarity.
The blank 10 is ;planed bottom and top a second time, this time by planing heads 17 and 18. Each of the planing heads 17 and 18 carry a set of radially, outwardly extending planing blades 17A
and 18A, respectively. See Step 5C, above. During the steps described above, the blank: 10 is held in position by conventional pressure shoes, beds and fences so that the finish tolerances are very precise, even though the blanks 10 are moving between 250 and 300 feet per minute.
Referring now to Figure 6, the blank 10 is then "split"
by circular splitter blade:a 20 and 21 along a horizontal plane into two identical strips, each .332" thick. The illustration in Figure ~~~~~J~
6 is simplified and schematic, and illustrates the general process by which the blanks 10 are split. This process is actually a "sawing" process, but the term "splitting" is used to emphasize the fact the blanks 10 are being "split" into two equal strips. Each of the splitter blades 20 and 21 are .120" thick and remove .125"
of material from the center of the blank 10. The splitter blades 20 and 21 are mounted on vertical axes which are spaced-apart along the direction of travel of the blank 10 through the splitter. The degree of spacing along the direction of travel between the blades 20 and 21 shown in Figure 6 is substantially exaggerated for clarity. In practice, the amount of downstream offset of the axis of rotatation of one of the blades 20 and 21 relative to the other is approximately 1/8", so that the blades 20 and 21 counter-rotate into the blank 10 such that the cuts actually take place almost simultaneously. .The same blades 20 and 21 are used for producing both 2 1/4" and 3 1/4" strips by adjusting the depth of the cut.
The downstream offset of the axis of rotatation of one of the blades 20 and 21 relative to the other remains approximately 1/8".
The adjustment of the splitter blades 20 and 21 is sufficiently precise that the cut surfaces of the blank 10 are flush or very nearly flush to within a tolerance of ~.004. The blank 10 is cut horizontally cut into two equally-sized strips l0A
and lOB.
As the cut takes place, the strips l0A and 108 are pushed across the top and bottom, respectively, of receiver plates 22 and 23. The receiver plates 22 and 23 move into the saw cut and, ~_ ~1~'~03~
support the top strip l0A and prevent its weight and feed roll pressure from causing it to sag, closing up the cut made by the splitter blades 20 and 21, and pinching the blade. As noted above, the receiver plates 22 and 23 are very slightly thicker (.005") than the splitter blades 20 and 21. Thus, the top strip l0A is lifted .005" to provide some clearance for the splitter blades 20 and 21 and therefore further reduce the possibility of the blades 20 and 21 being pinched.
As is shown in Figure 6, the front of the receiver plates 22 and 23 are forwardly tapered to feed into the saw cut as soon as it is made. Thus, the newly cut strips l0A and lOB are maintained in essentially the same vertical position as the blank 10 entering the splitter, except for a very slight lifting of the top strip 10A, described above. The receiver plates 22 and 23 also keep the bottom strip firmly positioned on the bed 25 of the splitter.
Adjustable fences 26 and 27 on the receiver plates 22 and 23 permit precise guidance of the strips l0A and lOB down the bed 25.
A hold-down shoe 29 prevents the top strip l0A from lifting off of the top of the receiver plates 22 and 23.
The splitter blades 20 and 21 have tungsten carbide cutting edges, and rotate at a speed of 5,400 rpm. Separate 50 horsepower motors power the splitter blades 20, 21 with sufficient torque to permit a clean cut at a through-put rate of between 250 and 300 feet per minute. This speed provides significant manufacturing efficiencies and permits production at a level consistent with the other manufacturing processes.

~16'~03~
At this point the strips l0A and lOB are properly sized, but have no tongue and grooves on the sides or ends, and have not yet been hollow-backed. These steps are carried out downstream in Step 7, above. Both strips l0A and 10B are identically sized and are indistinguishable from each other after manufacture.
Descrit~tion of Finished Low Profile Flooring Strip Referring now to Figures 7 and 8, a finished flooring strip l0A is shown. In Figure 7 the top, finished surface 40 is shown. One end of strip l0A has an interlocking groove 41 (See Step 8) and the other end of the strip l0A has an interlocking tongue 42 (See Step 9). An interlocking tongue 43 extends down one side edge of the strip 10A, while an interlocking groove 44 extends down the opposite side edge. As is shown in Figure 8, the back side surface 46 has three parallel and longitudinally-extending recesses 47, 48 and 49 (referred to as "hollowbacks" in the trade) .
The recess 49 is a nailing recess, and provides a space within which splinters created by nailing the strip l0A to the subfloor can reside. The recesses 47 and 48 are primarily for the purpose of relieving stress in the flooring strip 10A.
Referring now to Figure 9, a section of a floor 50 created from numerous low profile strips l0A and lOB is shown. The floor 50 is visually indistinguishable from a full-thickness floor according to the prior art once installed. As shown, the individual strips l0A and lOB interlock together to create a unitary structure. The individual flooring strips l0A and lOB are carefully interlocked, tongues 41 and 43 in grooves 42 and 44, respectively. The floor 50 is assembled "tongue side out", with the nails being driven into the strip l0A through the top of the tongue 43 at an approximate 45 degree angle so that the nail exits the back side surface 46 in the nailing recess 49 before penetrating into the subfloor.

Claims (23)

1. A method of producing a hardwood flooring product, comprising the steps of:
(a) processing a strip of raw wood into a blank having a predetermined thickness and width, and top and bottom surfaces defining parallel planes relative to each other wherein said step of processing comprises planing said blank;
(b) splitting the blank along the width of the blank from one side to the other to form two low profile flooring strips having the same width as the blank and a thickness less than one-half the thickness of the blank, said splitting step comprising the steps of:
(1) providing first and second circular saw blades mounted on spaced-apart vertical axes for rotation in a single plane intermediates and parallel to the planes of the top and bottom surfaces of the blank;
(2) positioning the blank on conveying means upstream from said saw blades with the plane of rotation of said saw blades intermediate and parallel to the planes of the top and bottom surfaces of the blank for movement of said blank from an upstream position to a downstream position relative to said saw blades; and (3) moving the blank downstream into the plane of rotation of the saw blades during rotation of said saw blades thereby horizontally splitting the blank to form first and second low-profile flooring strips.
2. A method of producing a hardwood flooring strip according to claim 1, and including the steps of molding interlocking members into first and second longitudinally-extending side edges of the flooring strips for securing together flooring strips placed side-to-side to form a floor.
3. A method of producing a hardwood flooring strip according to claim 1, and including the step of counterrotating the saw blades in a direction wherein both first and second saw blades cut into the wood in the upstream direction against the downstream direction of travel of the blank.
4. A method of producing a hardwood flooring strip according to any one of claims 1 to 3, wherein the step of providing first and second saw blades includes the step of positioning said first saw blade upstream from said second saw blade whereby the first saw blade begins its cut before the second saw blade begins its cut.
5. A method of producing a hardwood flooring strip according to any one of claims 1 to 3, wherein said first saw blade is positioned upstream from said second saw blade and therefore begins its cuts before the second saw blade begins its cut, and wherein both the first and second saw blades are positioned relative to the path of travel of the blank to cut into the blank more than one-half the distance of the width of the blank.
6. A method of producing a hardwood flooring strip according to claim 1, wherein the cutting thickness of the first and second saw blades, and thus the cutting waste of the splitting process, is more than 10 percent and less than 20 percent of the thickness of the blank.
7. A method of producing a hardwood flooring strip according to claim 1 or 2, and including the step of increasing the width of the cut in the blank immediately downstream from the first and second saw blades to prevent the blank from pinching the rotating blades, said step of increasing the width comprising introducing a plate into the area of the cut, said plate having a thickness sufficient to increase the width of the cut.
8. A method of producing a hardwood flooring strip according to claim 7, wherein said step of increasing the width of the cut in the blank comprises the step of introducing a plate into the area of the cut in the blank, said plate having a thickness sufficient to increase the width of the cut and thereby spread apart the blank on opposite sides of the cut.
9. A method of producing a hardwood flooring strip according to claim 7, wherein the step of increasing the width of the cut in the blank comprises the step of introducing first and second opposed plates into the area of the cut in the blank from opposite sides of the blank, each of said first and second plates having a thickness sufficient to increase the width of the cut and thereby spread apart the blank on opposite sides of the cut.
10. A method of producing a hardwood flooring strip according to claim 1, and including the step of applying pressure to the top surface of the blank before, during and after the saw blades cut the blank whereby the low profile strip is precisely split while permitting high-speed processing.
11. A method of producing a hardwood flooring strip according to claim 1, wherein said blank is less than one inch in thickness as the method steps begin, and the finished flooring strip in its finished form has a nominal thickness of 5/16 inch.
12. A method of producing a hardwood flooring strip according to claims 1 or 2, wherein the steps take place at a rate of feed of the blank into the saw blades of the splitter at a rate of not less than 200 feet per minute.
13. A hardwood flooring product made according to a method comprising the steps of:
(a) processing a strip of raw wood into a blank having a predetermined thickness and width, and top and bottom surfaces defining parallel planes relative to each other wherein said step of processing comprises planing said blank;
(b) splitting the blank along the width of the dimension from one side to the other to form two low profile flooring strips having the same width as the blank and a thickness less than one ______________________________________ half the thickness of the blank, said splitting step comprising the steps of:
(1) providing first and second circular saw blades mounted on spaced-apart vertical axes for rotation in a single plane intermediate and parallel to the planes of the top and bottom surfaces of the blank;
(2) positioning the blank on conveying means upstream from said saw blades with the plane of rotation of said saw blades intermediate and parallel to the planes of the top and bottom surfaces of the blank for movement of said blank from an upstream position to a downstream position relative to said saw blades;
(3) moving the blank downstream into the plane of rotation of the saw blades during rotation of said saw blades thereby horizontally splitting the blank to form first and second low-profile flooring strips.
14. A hardwood flooring strip according to claim 13, including the steps of molding interlocking members into first and second longitudinally-extending side edges of the flooring strips for securing together flooring strips placed side-to-side to form a floor.
15. A hardwood flooring strip according to claim 13 or 14, and including the step of counterrotating the saw blades in a direction wherein both first and second saw blades cut into the wood in the upstream direction against the downstream direction of travel of the blank.
16. A hardwood flooring strip according to 15, wherein the step of providing first and second saw blades includes the step of positioning said first saw blade upstream from said second saw blade whereby the first saw blade begins its cut before the second saw blade begins its cut.
17. A hardwood flooring strip according to 13 or 14, wherein said first saw blade is positioned upstream from said second saw blade and therefore begins its cut before the second saw blade begins its cut, and wherein both the first and second saw blades are positioned relative to the path of travel of the blank to cut into the blank more than one-half the distance of the width of the blank.
18. A hardwood flooring strip according to claim 13, wherein the cutting thickness of the first and second saw blades, and thus the cutting waste of the splitting process, is more than 10 percent and less than 20 percent of the thickness of the blank.
19. A hardwood flooring strip according to claim 13 or 14, and including the step of increasing the width of the cut in the blank immediately downstream from the first and second saw blades to prevent the blank from pinching the rotating blades, said step of increasing the width comprising introducing a plate into the area of the cut, said plate having a thickness sufficient to increase the width of the cut.
20. A hardwood flooring strip according to claim 19, wherein said step of increasing the width of the cut in the blank comprises the step of introducing a plate into the area of the cut in the blank, said plate having a thickness sufficient to increase the width of the cut and thereby spread apart the blank on opposite sides of the cut.
21. A hardwood flooring strip according to claim 19, wherein the step of increasing the width of the cut in the blank comprises the step of introducing first and second opposed plates into the area of the cut in the blank from opposite sides of the blank, each of said first and second plates having a thickness sufficient to increase the width of the cut and thereby spread apart the blank on opposite sides of the cut.
22. A hardwood flooring strip according to claim 13, and including the step of applying pressure to the top surface of the blank before, during and after the saw blades cut the blank.
23. A hardwood flooring product according to claim 13, including the step of applying a decorative and protective finish to one surface of the flooring strip defined as an exposed surface when installed.
CA002167038A 1995-01-17 1996-01-11 Low profile hardwood flooring strip and method of manufacture Expired - Fee Related CA2167038C (en)

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Families Citing this family (79)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE515210C2 (en) * 2000-04-10 2001-06-25 Valinge Aluminium Ab Locking systems for joining floorboards and floorboards provided with such locking systems and floors formed from such floorboards
SE501014C2 (en) 1993-05-10 1994-10-17 Tony Pervan Grout for thin liquid hard floors
US7775007B2 (en) * 1993-05-10 2010-08-17 Valinge Innovation Ab System for joining building panels
SE509060C2 (en) * 1996-12-05 1998-11-30 Valinge Aluminium Ab Method for manufacturing building board such as a floorboard
US6148884A (en) * 1995-01-17 2000-11-21 Triangle Pacific Corp. Low profile hardwood flooring strip and method of manufacture
SE9500810D0 (en) 1995-03-07 1995-03-07 Perstorp Flooring Ab Floor tile
US7131242B2 (en) * 1995-03-07 2006-11-07 Pergo (Europe) Ab Flooring panel or wall panel and use thereof
US6588166B2 (en) 1995-03-07 2003-07-08 Pergo (Europe) Ab Flooring panel or wall panel and use thereof
US6421970B1 (en) 1995-03-07 2002-07-23 Perstorp Flooring Ab Flooring panel or wall panel and use thereof
US5816304A (en) * 1997-08-04 1998-10-06 Triangle Pacific Corporation Apparatus and method for increasing the flexibility of and straightening flooring strips
US5935668A (en) * 1997-08-04 1999-08-10 Triangle Pacific Corporation Wooden flooring strip with enhanced flexibility and straightness
US5894700A (en) * 1997-08-04 1999-04-20 Triangle Pacific Corporation Glue-down prefinished wood flooring product
US7992358B2 (en) 1998-02-04 2011-08-09 Pergo AG Guiding means at a joint
US7386963B2 (en) * 1998-06-03 2008-06-17 Valinge Innovation Ab Locking system and flooring board
SE512313C2 (en) 1998-06-03 2000-02-28 Valinge Aluminium Ab Locking system and floorboard
SE514645C2 (en) 1998-10-06 2001-03-26 Perstorp Flooring Ab Floor covering material comprising disc-shaped floor elements intended to be joined by separate joint profiles
US7877956B2 (en) * 1999-07-05 2011-02-01 Pergo AG Floor element with guiding means
US6086461A (en) * 1999-10-04 2000-07-11 Harris-Tarkett, Inc. Wood strip sanding machine
SE517183C2 (en) * 2000-01-24 2002-04-23 Valinge Aluminium Ab Locking system for mechanical joining of floorboards, floorboard provided with the locking system and method for making such floorboards
SE518184C2 (en) 2000-03-31 2002-09-03 Perstorp Flooring Ab Floor covering material comprising disc-shaped floor elements which are joined together by means of interconnecting means
US6769218B2 (en) 2001-01-12 2004-08-03 Valinge Aluminium Ab Floorboard and locking system therefor
EP1402128B1 (en) * 2001-06-02 2012-11-28 Deutsche Rockwool Mineralwoll GmbH & Co. OHG Method for producing roof insulation plates, roof insulation plates and device for implementing said method
US8028486B2 (en) * 2001-07-27 2011-10-04 Valinge Innovation Ab Floor panel with sealing means
SE525558C2 (en) 2001-09-20 2005-03-08 Vaelinge Innovation Ab System for forming a floor covering, set of floorboards and method for manufacturing two different types of floorboards
US8250825B2 (en) * 2001-09-20 2012-08-28 Välinge Innovation AB Flooring and method for laying and manufacturing the same
NL1019102C2 (en) * 2001-10-03 2003-04-04 Luxwood Systems B V Multi layer panel production method for making e.g. floor panel sections, involves sawing from both short sides to prevent warping
SE525661C2 (en) * 2002-03-20 2005-03-29 Vaelinge Innovation Ab Floor boards decorative joint portion making system, has surface layer with underlying layer such that adjoining edge with surface has underlying layer parallel to horizontal plane
IL164344A0 (en) 2002-04-03 2005-12-18 Valinge Innovation Ab Mechanical locking system for floorboards
SE525657C2 (en) * 2002-04-08 2005-03-29 Vaelinge Innovation Ab Flooring boards for floating floors made of at least two different layers of material and semi-finished products for the manufacture of floorboards
US8850769B2 (en) * 2002-04-15 2014-10-07 Valinge Innovation Ab Floorboards for floating floors
US7739849B2 (en) * 2002-04-22 2010-06-22 Valinge Innovation Ab Floorboards, flooring systems and methods for manufacturing and installation thereof
DE10252865A1 (en) * 2002-11-12 2004-05-27 Kronotec Ag Process for creating a structured decoration in a wood-based panel
US7617651B2 (en) * 2002-11-12 2009-11-17 Kronotec Ag Floor panel
DE10262235B4 (en) * 2002-11-12 2010-05-12 Kronotec Ag Particle board, in particular floor panel or furniture panel, and method for its production
ES2307840T3 (en) * 2002-11-15 2008-12-01 Flooring Technologies Ltd. EQUIPMENT COMPOSED BY TWO CONSTRUCTION PLATES THAT CAN JOIN BETWEEN YES AND AN INSERTED PIECE TO INTERLOCK THESE CONSTRUCTION PLATES.
DE10306118A1 (en) 2003-02-14 2004-09-09 Kronotec Ag building board
US20040206036A1 (en) * 2003-02-24 2004-10-21 Valinge Aluminium Ab Floorboard and method for manufacturing thereof
US7678425B2 (en) * 2003-03-06 2010-03-16 Flooring Technologies Ltd. Process for finishing a wooden board and wooden board produced by the process
US7845140B2 (en) 2003-03-06 2010-12-07 Valinge Innovation Ab Flooring and method for installation and manufacturing thereof
US7677001B2 (en) * 2003-03-06 2010-03-16 Valinge Innovation Ab Flooring systems and methods for installation
DE20304761U1 (en) * 2003-03-24 2004-04-08 Kronotec Ag Device for connecting building boards, in particular floor panels
DE10362218B4 (en) * 2003-09-06 2010-09-16 Kronotec Ag Method for sealing a building board
DE20315676U1 (en) * 2003-10-11 2003-12-11 Kronotec Ag Panel, especially floor panel
US7886497B2 (en) * 2003-12-02 2011-02-15 Valinge Innovation Ab Floorboard, system and method for forming a flooring, and a flooring formed thereof
US7506481B2 (en) * 2003-12-17 2009-03-24 Kronotec Ag Building board for use in subfloors
US7516588B2 (en) * 2004-01-13 2009-04-14 Valinge Aluminium Ab Floor covering and locking systems
US20050166516A1 (en) 2004-01-13 2005-08-04 Valinge Aluminium Ab Floor covering and locking systems
DE102004005047B3 (en) * 2004-01-30 2005-10-20 Kronotec Ag Method and device for introducing a strip forming the spring of a plate
DE102004011531C5 (en) * 2004-03-08 2014-03-06 Kronotec Ag Wood-based panel, in particular floor panel
DE102004011931B4 (en) * 2004-03-11 2006-09-14 Kronotec Ag Insulation board made of a wood-material-binder fiber mixture
SE527570C2 (en) * 2004-10-05 2006-04-11 Vaelinge Innovation Ab Device and method for surface treatment of sheet-shaped material and floor board
US7841144B2 (en) * 2005-03-30 2010-11-30 Valinge Innovation Ab Mechanical locking system for panels and method of installing same
US7454875B2 (en) * 2004-10-22 2008-11-25 Valinge Aluminium Ab Mechanical locking system for floor panels
US8215078B2 (en) * 2005-02-15 2012-07-10 Välinge Innovation Belgium BVBA Building panel with compressed edges and method of making same
US7680823B2 (en) * 2005-05-17 2010-03-16 International Business Machines Corporation Custom report generation
US8061104B2 (en) 2005-05-20 2011-11-22 Valinge Innovation Ab Mechanical locking system for floor panels
DE102005042657B4 (en) * 2005-09-08 2010-12-30 Kronotec Ag Building board and method of manufacture
US7854986B2 (en) * 2005-09-08 2010-12-21 Flooring Technologies Ltd. Building board and method for production
DE102005042658B3 (en) * 2005-09-08 2007-03-01 Kronotec Ag Tongued and grooved board for flooring has at least one side surface and tongue and/or groove with decorative layer applied
DE102005063034B4 (en) 2005-12-29 2007-10-31 Flooring Technologies Ltd. Panel, in particular floor panel
DE102006006124A1 (en) * 2006-02-10 2007-08-23 Flooring Technologies Ltd. Device for locking two building panels
DE102006007976B4 (en) * 2006-02-21 2007-11-08 Flooring Technologies Ltd. Process for refining a building board
CN101092848A (en) * 2006-06-20 2007-12-26 韦尔蒂奇私人控股有限公司 Engineered wood floor using core material with vertical glue-line position
CA2605215C (en) * 2006-10-02 2014-12-02 Prolam, Societe En Commandite Utilization of coloration to improve the detection of "hit or miss" defects when using scanner equipment and an automated saw to remove defects in wood pieces
US20080099105A1 (en) * 2006-10-12 2008-05-01 Timothy Kelly Method for producing wood flooring
US20080313958A1 (en) * 2007-06-25 2008-12-25 Pachanoor Devanand S Method for drying cane
CA2636544C (en) * 2007-07-05 2014-07-08 Osi Machinerie Inc. Floor planks production machine and method
CN101250938B (en) * 2008-03-21 2011-08-10 陈兆红 Water-proof floor
EA013034B1 (en) * 2008-12-11 2010-02-26 Артур Робертович Кочаров Machine for cutting wood strips
FR2949087B1 (en) * 2009-08-17 2014-09-19 Sermas Ind SAWING INSTALLATION FOR METAL PLATES
DE102010004717A1 (en) 2010-01-15 2011-07-21 Pergo (Europe) Ab Set of panels comprising retaining profiles with a separate clip and method for introducing the clip
CA2906474C (en) 2010-05-10 2018-12-18 Pergo (Europe) Ab Set of panels
CN101973058A (en) * 2010-11-15 2011-02-16 苏州卓识商务咨询有限公司 Wood floor processing and forming device
SE536027C2 (en) * 2011-11-29 2013-04-09 Mattias Bystroem Kantsågmaskin
DE102012200481A1 (en) * 2012-01-13 2013-07-18 Homag Holzbearbeitungssysteme Gmbh Four-sided machining in double end tenoner
CN103507136B (en) * 2013-10-15 2015-09-02 盐城工学院 Full-automatic archaized wood floor processing machine
CN110067358A (en) 2019-06-04 2019-07-30 安徽扬子地板股份有限公司 A kind of production method of quick sideslip installation floor
CN110341050B (en) * 2019-08-16 2024-01-19 吉林大学 Self-balancing self-adaptation stone material saw cuts device
EP3798385A1 (en) * 2019-09-24 2021-03-31 Välinge Innovation AB Building panel

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US338973A (en) * 1886-03-30 johnson
US362896A (en) * 1887-05-10 Foueth to dayid wilson and eben b
US418345A (en) * 1889-12-31 Setts
US932373A (en) * 1909-03-10 1909-08-24 John W Burns Wood-planer cutter-head.
US955379A (en) * 1909-07-24 1910-04-19 John W Burns Separating-plate for board-cutting saws.
US987012A (en) * 1910-04-23 1911-03-14 Joseph D Virdin Planing-machine and attachment.
US1456864A (en) * 1920-07-07 1923-05-29 Woods Machine Co Sa Side-head construction for matchers and the like
GB226529A (en) * 1923-12-18 1925-08-13 Arnold I Van Den Bergh S Embal Improvements in and relating to edge trimming and moulding machines for planks and laths
US1584796A (en) * 1925-03-05 1926-05-18 Stover Lumber Company Resawing machine
US1602040A (en) * 1925-03-05 1926-10-05 Stover Lumber Company Separating device for resawing machines
US1778333A (en) * 1928-06-27 1930-10-14 Frank F Flanner Manufacture of lumber
US1801244A (en) * 1929-04-23 1931-04-14 Woods Machine Co Sa Machine for producing wooden blocks
US3738404A (en) * 1971-02-22 1973-06-12 W Walker Method of producing dressed lumber from logs
US3934630A (en) * 1973-04-16 1976-01-27 Cockle Roy R Method and apparatus for producing rough cut lumber
US4879857A (en) * 1985-06-13 1989-11-14 Sport Floor Design, Inc. Resilient leveler and shock absorber for sport floor
DE3700799A1 (en) * 1987-01-14 1988-07-28 Guenter Grimme Double-shaft multi-blade circular saw for cross-cuts and individual cuts
SE8703354L (en) * 1987-08-31 1989-03-01 Olav Hoel SEAT FOR PREPARATION OF FLOOR BREADS AND ACCORDING TO SATISFACTION
DE3743895A1 (en) * 1987-12-23 1989-07-13 Herm Friedr Kuenne Fa REMOVABLE BRIDGE PROFILE FOR FLOOR JOINTS
DE3936312A1 (en) * 1989-11-01 1991-05-02 Linck Masch Gatterlinck Laminated wood panels formed from narrow laminations - which are glued edge to edge to form sheets which are glued together

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US5823240A (en) 1998-10-20
EP0727292A1 (en) 1996-08-21
CA2167038A1 (en) 1996-07-18
US5597024A (en) 1997-01-28

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