US3627006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for producing wood veneer
Assignee: Polymer Chemical Co BV
•
Filing: 1970-03-02
•
Granted: 1971-12-14
•
Expires: 1990-03-02
Abstract
Abstract The veneer-cutting procedure involves the new step of supporting the workpiece for slicing for forcing a strong backing board to transfer inherent stress to an inherent warp of the workpiece, so that the backing board takes the warp out of the workpiece as the thickness of the workpiece approaches zero value during slicing.
Inventors
- 👤 Melvin Swillinger
- 👤 Charles F Hobbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:27
CPC Classifications
B; B27; B27L; B27L5/00; B27L5/06
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
257 words
The method of producing a succession of veneer leaves by repeatedly subjecting a log section workpiece to substantially parallel cuts of a slicing tool, said methoD comprising the steps of: establishing upon the workpiece an initially substantially flat and extensive bonding surface; subjecting the workpiece to a treatment which facilitates slicing but warps said bonding surface to produce concavity thereof; superimposing upon the concave bonding surface a substantially flat elongate backing board, with an adhesive material therebetween, said backing board being of limited flexibility and characterized by a strong tendency to return to planar condition after flexing; subjecting the workpiece and the superimposed backing board to the compressive action of a highly pressured matrix which applies to the backing board between its side edges a heavy force sufficient to flex said backing board into firm adhesive contact with the deep areas of said bonding surface concavity, thereby to adhesively maintain the backing board under stress by adhesion to said concaved bonding surface; then removing the matrix pressure; then while said backing board is under stress by adhesion alone, slicing veneer leaves successively from the workpiece in substantial parallelism with the mean plane of the backing board until the warping force in the workpiece is gradually weakened by the removal of workpiece material, and until said warping force is substantially overcome by the force inherent in the backing board acting to restore the backing board and the adherent bonding surface of the workpiece to initial substantially flat condition, said slicing continuing into close proximity to said backing board.
Claim 2
Independent Claim
257 words
The method of producing a succession of veneer leaves by repeatedly subjecting a log section workpiece to substantially parallel cuts of a slicing tool, said methoD comprising the steps of: establishing upon the workpiece an initially substantially flat and extensive bonding surface; subjecting the workpiece to a treatment which facilitates slicing but warps said bonding surface to produce concavity thereof; superimposing upon the concave bonding surface a substantially flat elongate backing board, with an adhesive material therebetween, said backing board being of limited flexibility and characterized by a strong tendency to return to planar condition after flexing; subjecting the workpiece and the superimposed backing board to the compressive action of a highly pressured matrix which applies to the backing board between its side edges a heavy force sufficient to flex said backing board into firm adhesive contact with the deep areas of said bonding surface concavity, thereby to adhesively maintain the backing board under stress by adhesion to said concaved bonding surface; then removing the matrix pressure; then while said backing board is under stress by adhesion alone, slicing veneer leaves successively from the workpiece in substantial parallelism with the mean plane of the backing board until the warping force in the workpiece is gradually weakened by the removal of workpiece material, and until said warping force is substantially overcome by the force inherent in the backing board acting to restore the backing board and the adherent bonding surface of the workpiece to initial substantially flat condition, said slicing continuing into close proximity to said backing board.
Claim 3
Dependent Claim
25 words
The method as defined by claim 1, which includes holding the workpiece while undergoing slicing, by clamping the adhesively attached backing board to a support.
Claim 4
Dependent Claim
17 words
The method as defined by claim 1, wherein said treatment to facilitate slicing includes moisturizing the workpiece.
Claim 5
Dependent Claim
29 words
The method as defined by claim 3, which includes the step of removing some of the moisture from the bonding surface of the workpiece prior to applying the adhesive.
Claim 6
Dependent Claim
23 words
The method as defined by claim 1, wherein said backing board is flexed into firm adhesive contact with said bonding surface by rolling.
Claim 7
Dependent Claim
25 words
The method as defined by claim 4, which includes holding the workpiece while undergoing slicing, by clamping the adhesively attached backing board to a support.
Claim 8
Dependent Claim
24 words
The method as defined by claim 6, wherein the clamping is effected at the side edges of the backing board throughout the veneer-cutting operation.
Claim 9
Independent Claim
130 words
The method of preparing for veneer cutting a loglike workpiece which has a bonding surface planed and subsequently warped to concavity, said method comprising: superposing upon said bonding surface a flat elongate backing board with an adhesive between said board and said bonding surface; said backing board being of limited flexibility and characterized by a strong tendency to return to planar condition after flexing; then subjecting the workpiece and the superposed backing board to the compressive action of a highly pressured matrix which applies to the backing board between its side edges a heavy force sufficient to flex said backing board into firm adhesive contact with the deep areas of said bonding surface concavity, thereby to adhesively maintain the backing board under stress by adhesion to said concaved bonding surface.
Claim 10
Independent Claim
130 words
The method of preparing for veneer cutting a loglike workpiece which has a bonding surface planed and subsequently warped to concavity, said method comprising: superposing upon said bonding surface a flat elongate backing board with an adhesive between said board and said bonding surface; said backing board being of limited flexibility and characterized by a strong tendency to return to planar condition after flexing; then subjecting the workpiece and the superposed backing board to the compressive action of a highly pressured matrix which applies to the backing board between its side edges a heavy force sufficient to flex said backing board into firm adhesive contact with the deep areas of said bonding surface concavity, thereby to adhesively maintain the backing board under stress by adhesion to said concaved bonding surface.
Claim 11
Dependent Claim
32 words
The method as defined by claim 8, wherein the matrix is in the form of an elongate member having a convex pressure face substantially complementary to the surface concavity of the workpiece.
Claim 12
Dependent Claim
34 words
The method as defined by claim 9, wherein said elongate member is a pressure roll whose diametral dimension diminishes gradually from the midpoint of the pressure face toward the opposite ends of the roll.
Claim 13
Dependent Claim
22 words
The method as defined by claim 10, wherein the backing board has a width dimension approximating the width dimension of the workpiece.
Claim 14
Dependent Claim
22 words
The method as defined by claim 8, wherein the backing board has a width dimension approximating the width dimension of the workpiece.
Claim 15
Dependent Claim
70 words
The method as defined by claim 8, which inclUdes the steps of clamping said backing board in a veneer-cutting machine, and slicing veneer leaves successively from the workpiece to diminish the thickness of the workpiece, thereby to weaken the force of the warp thereof and enable the strong tendency of the backing board to return to planar condition, to substantially overcome the warp of the workpiece during the slicing operation.
Claim 16
Dependent Claim
32 words
The method as defined by claim 13, wherein the matrix is in the form of an elongate member having a convex pressure face substantially complementary to the surface concavity of the workpiece.
Claim 17
Dependent Claim
34 words
The method as defined by claim 14, wherein said elongate member is a pressure roll whose diametral dimension diminishes gradually from the midpoint of the pressure face toward the opposite ends of the roll.
Claim 18
Dependent Claim
22 words
The method as defined by claim 15, wherein the backing board has a width dimension approximating the width dimension of the workpiece.
Claim 19
Dependent Claim
33 words
The method as defined by claim 8, wherein said adhesive constitutes one coating applied to the warped bonding surface of the workpiece, and another coating applied to one face of the backing board.
Claim 20
Dependent Claim
70 words
The method as defined by claim 17, which includes the steps of clamping said backing board in a veneer-cutting machine, and slicing veneer leaves successively from the workpiece to diminish the thickness of the workpiece, thereby to weaken the force of the warp thereof and enable the strong tendency of the backing board to return to planar condition, to substantially overcome the warp of the workpiece during the slicing operation.
Claim 21
Dependent Claim
31 words
The method as defined by claim 18, wherein the matrix is in the form of an elongate member having a convex face substantially complementary to the surface concavity of the workpiece.
Claim 22
Dependent Claim
33 words
The method as defined by claim 19, wherein said elongate member is a pressure roll whose diametral dimension diminishes from the midpoint of the pressure face toward the opposite ends of the roll.
Claim 23
Dependent Claim
22 words
The method as defined by claim 19, wherein the backing board has a width dimension approximating the width dimension of the workpiece.
Claim 24
Dependent Claim
216 words
Mechanism for producing veneer from an elongate loglike workpiece having an initially substantially flat and extensive bonding surface, said means comprising in combination; means for subjecting the workpiece to moisture sufficient to warp said bonding surface and impart concavity thereto; an elongate substantially flat backing board of limited flexibility and characterized by a strong tendency thereof to return to planar condition after flexing; means for pressing said board onto the concave bonding surface of said workpiece with an adhesive interposed, said means comprising an elongate pressure member having a convex pressure face substantially complementary to the surface concavity of the workpiece, said pressure member applying heavy force mainly to that area of the backing board which is intermediate the side edges of said board, thereby to flex said backing board into firm adhesive contact with the deep areas of said bonding surface concavity to maintain the backing board under stress by adhesion to said concaved bonding surface; clamp means operative upon termination of the pressing operation, to grip the backing board; and means including a cutter for successively slicing veneer leaves from the workpiece while held by the clamp means and maintained under stress by the adherent stressed backing board, the slicing being performed in planes substantially parallel to the mean plane of the backing board.
Claim 25
Dependent Claim
216 words
Mechanism for producing veneer from an elongate loglike workpiece having an initially substantially flat and extensive bonding surface, said means comprising in combination; means for subjecting the workpiece to moisture sufficient to warp said bonding surface and impart concavity thereto; an elongate substantially flat backing board of limited flexibility and characterized by a strong tendency thereof to return to planar condition after flexing; means for pressing said board onto the concave bonding surface of said workpiece with an adhesive interposed, said means comprising an elongate pressure member having a convex pressure face substantially complementary to the surface concavity of the workpiece, said pressure member applying heavy force mainly to that area of the backing board which is intermediate the side edges of said board, thereby to flex said backing board into firm adhesive contact with the deep areas of said bonding surface concavity to maintain the backing board under stress by adhesion to said concaved bonding surface; clamp means operative upon termination of the pressing operation, to grip the backing board; and means including a cutter for successively slicing veneer leaves from the workpiece while held by the clamp means and maintained under stress by the adherent stressed backing board, the slicing being performed in planes substantially parallel to the mean plane of the backing board.
Claim 26
Dependent Claim
30 words
The combination as defined by claim 22, wherein the combination includes means for surface drying the bonding surface of the moisturized workpiece, and for applying adhesive to said dried surface.
Claim 27
Dependent Claim
22 words
The combination as defined by claim 22, wherein the backing board has a width dimension approximating the width dimension of the workpiece.
Claim 28
Dependent Claim
35 words
The combination as defined by claim 22, wherein said elongate member is a rotary pressure roll for applying force upon said backing Board; and means for progressively advancing the workpiece relative to said pressure roll.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |