US3878015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of molding curved veneer laminated stock
Assignee: Sterling-Bruce Inc
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Filing: 1972-08-01
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Granted: 1975-04-15
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Expires: 1992-08-01
Abstract
Abstract Disclosed is a method of manufacturing a laminated veneer stock that is dimensionally stable, resistant to splitting, cracking and checking. The method disclosed calls for providing at least one innermost and two outermost veneer sheets each having a grain and two major surface areas. A coating of polyvinyl acetate is applied to both major surfaces of the innermost sheet or sheets and one of the major surfaces of both of the outermost sheets. After assembling the coated veneer sheets into a pile - with the sheets having a coating-to-coating relationship between all major surfaces save for one surface each of the outermost veneer sheets and the grain of each sheet extending in a common direction - the pile is pressed into a consolidated composite. The pressing takes place at room temperature between spaced-apart first and second pressing surfaces, at least a part of one of which is curved. The pressing surfaces are moved into a pressing position where all points on one of the pressing surfaces are equal distances from corresponding opposite points on the other second pressing surface, and maintained in this position for at least eighteen minutes. The veneer sheets thus pressed conform to the curved surfaces of the pressing surfaces and are consolidated into a composite that is resistent to cracking, splitting and checking when worked with conventional woodworking machinery.
Inventors
- 👤 Ervin R Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:24
CPC Classifications
B; B27; B27D; B27D1/00; B27D1/04; B27D1/08; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T156/1044; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
188 words
A METHOD OF MANUFACTURING A LAMINATED WOOD VENEER STOCK COMPRISING A. PROVIDING AT LEAST ONE INNERMOST AND TWO OUTERMOST WOOD VENEER SHEETS EACH HAVING A GRAIN AND TWO MAJOR SURFACE AREAS; B. COATING SAID INNERMOST SHEET OR SHEETS ON BOTH OF SAID MAJOR SURFACE THEREOF AND ONE OF THE MAJOR SURFACES OF BOTH OF SAID OUTERMOST SHEETS WITH POLYVINYL ACETATE; THAT SAID SHEETS HAVE A POLYVINYL ACETATE COATING-TO-COATING RELATIONSHIP BETWEEN ALL OF SAID MAJOR SURFACES, SAVE FOR ONE SURFACE OF EACH SAID OUTERMOST VENEER SHEETS, AND THE GRAIN OF SUCH SHEETS EXTENDING IN A COMMON DIRECTION; AND, D. AT ROOM TEMPERATURE, CONSOLIDATING SAID PILE INTO A COMPOSITE OF PREDETERMINED THICKNESS BY PRESSING SAME INTO FINAL SHAPE, FOR AT LEAST EIGHTEEN MINUTES, BETWEEN FIRST AND SECOND SPACED-APART CURVED PRESSIBNG SURFACES WHICH ARE NON-CONFORMING IN CLOSED CONTACTING POSITIONS AND WHICH ARE SO CONFIGURED THAT ALL POINTS ON SAID FIRST PRESSING SURFACE ARE EQUIDISTANT FORM CORRESPONDING OPPOSITE POINTS ON SAID SECOND PRESSING SURFACE WHEN THE SPACING BETWEEN SAID PRESSING SURFACES IN EQUAL TO SAID PREDETERMINED THICKNESS OF SAID COMPOSITE, THEREBY CONFORMING SAID VENEER SHEETS TO THE CONFIGURATION OF SAID PRESSING SURFACES.
Claim 2
Independent Claim
188 words
A METHOD OF MANUFACTURING A LAMINATED WOOD VENEER STOCK COMPRISING A. PROVIDING AT LEAST ONE INNERMOST AND TWO OUTERMOST WOOD VENEER SHEETS EACH HAVING A GRAIN AND TWO MAJOR SURFACE AREAS; B. COATING SAID INNERMOST SHEET OR SHEETS ON BOTH OF SAID MAJOR SURFACE THEREOF AND ONE OF THE MAJOR SURFACES OF BOTH OF SAID OUTERMOST SHEETS WITH POLYVINYL ACETATE; THAT SAID SHEETS HAVE A POLYVINYL ACETATE COATING-TO-COATING RELATIONSHIP BETWEEN ALL OF SAID MAJOR SURFACES, SAVE FOR ONE SURFACE OF EACH SAID OUTERMOST VENEER SHEETS, AND THE GRAIN OF SUCH SHEETS EXTENDING IN A COMMON DIRECTION; AND, D. AT ROOM TEMPERATURE, CONSOLIDATING SAID PILE INTO A COMPOSITE OF PREDETERMINED THICKNESS BY PRESSING SAME INTO FINAL SHAPE, FOR AT LEAST EIGHTEEN MINUTES, BETWEEN FIRST AND SECOND SPACED-APART CURVED PRESSIBNG SURFACES WHICH ARE NON-CONFORMING IN CLOSED CONTACTING POSITIONS AND WHICH ARE SO CONFIGURED THAT ALL POINTS ON SAID FIRST PRESSING SURFACE ARE EQUIDISTANT FORM CORRESPONDING OPPOSITE POINTS ON SAID SECOND PRESSING SURFACE WHEN THE SPACING BETWEEN SAID PRESSING SURFACES IN EQUAL TO SAID PREDETERMINED THICKNESS OF SAID COMPOSITE, THEREBY CONFORMING SAID VENEER SHEETS TO THE CONFIGURATION OF SAID PRESSING SURFACES.
Claim 3
Independent Claim
194 words
A method of manufacturing a laminated wood veneer stock comprising: a. providing at least one innermost and two outermost wood veneer sheets each having a grain and two major surface areas; b. coating said innermost sheet or sheets on both of said major surfaces thereof and one of the major surfaces of both of said outermost sheets with polyvinyl acetate; c. assembling said coating veneer sheets into a pile so that said sheets have a polyvinyl acetate coating-to-coating relationship between all of said major surfaces, save for one surface of each of said outermost veneer sheets, and the grain of such sheets extending in a common direction; and d. at room temperature, consolidating said pile into a composite of predetermined thickness by pressing same into final shape between first and second spaced-apart curved pressing surfaces which are non-conforming in closed, contacting positions and which are so configured that all points on said first pressing surface are equidistant from corresponding opposite points on said second pressing surface when the spacing between said pressing surfaces is equal to said predetermined thickness of said composite, thereby conforming said veneer sheets to the configuration of said pressing surfaces.
Claim 4
Independent Claim
194 words
A method of manufacturing a laminated wood veneer stock comprising: a. providing at least one innermost and two outermost wood veneer sheets each having a grain and two major surface areas; b. coating said innermost sheet or sheets on both of said major surfaces thereof and one of the major surfaces of both of said outermost sheets with polyvinyl acetate; c. assembling said coating veneer sheets into a pile so that said sheets have a polyvinyl acetate coating-to-coating relationship between all of said major surfaces, save for one surface of each of said outermost veneer sheets, and the grain of such sheets extending in a common direction; and d. at room temperature, consolidating said pile into a composite of predetermined thickness by pressing same into final shape between first and second spaced-apart curved pressing surfaces which are non-conforming in closed, contacting positions and which are so configured that all points on said first pressing surface are equidistant from corresponding opposite points on said second pressing surface when the spacing between said pressing surfaces is equal to said predetermined thickness of said composite, thereby conforming said veneer sheets to the configuration of said pressing surfaces.
Claim 5
Independent Claim
201 words
A method of manufacturing a laminated wood veneer stock comprising: a. providing at least one innermost and two outermost wood veneer sheets each having a grain and two major surface areas; b. coating said innermost sheet or sheets on both of said major surfaces thereon and one of the major surfaces of both of said outermost sheets with an adhesive consisting essentially of polyvinyl acetate; c. assembling said coated veneer sheets into a pile, so that said sheets have a polyvinyl acetate coating-to-coating relationship between all of said major surfaces, save for one surface of each of said outermost veneer sheets and the grain of such sheets extending in a common direction; and, d. at room temperature, consolidating said pile into a composite of predetermined thickness by pressing same into final shape between first and second spaced-apart curved pressing surfaces which are non-conforming and non-complimentary in closed contacting positions and which are so configured that all points on said first pressing surface are equidistant from corresponding opposite points on said second pressing surface when the spacing between said pressing surfaces is equal to said predetermined thickness of said composite, thereby conforming said veneer sheets to the configuration of said pressing surfaces.
Claim 6
Independent Claim
201 words
A method of manufacturing a laminated wood veneer stock comprising: a. providing at least one innermost and two outermost wood veneer sheets each having a grain and two major surface areas; b. coating said innermost sheet or sheets on both of said major surfaces thereon and one of the major surfaces of both of said outermost sheets with an adhesive consisting essentially of polyvinyl acetate; c. assembling said coated veneer sheets into a pile, so that said sheets have a polyvinyl acetate coating-to-coating relationship between all of said major surfaces, save for one surface of each of said outermost veneer sheets and the grain of such sheets extending in a common direction; and, d. at room temperature, consolidating said pile into a composite of predetermined thickness by pressing same into final shape between first and second spaced-apart curved pressing surfaces which are non-conforming and non-complimentary in closed contacting positions and which are so configured that all points on said first pressing surface are equidistant from corresponding opposite points on said second pressing surface when the spacing between said pressing surfaces is equal to said predetermined thickness of said composite, thereby conforming said veneer sheets to the configuration of said pressing surfaces.
Claim 7
Dependent Claim
38 words
A method as set forth in claim 3 wherein that pressing position where all points on said first pressing surfaces are equidistant from corresponding opposite points on said second pressing surface is maintained for at least eighteen minutes.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |