US3715257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a flat particle-faced plywood panel
Assignee: Potlatch Forests Inc
•
Filing: 1971-02-26
•
Granted: 1973-02-06
•
Expires: 1991-02-26
Abstract
Abstract A method for minimizing warpage of a plywood assembly having a bonded face of wood particle board or similar material. This is accomplished by curing the particle board layer on a single sheet of veneer, which consequently is used in place of a conventional face veneer in a plywood layup.
Inventors
- 👤 J Dunaway
- 👤 M Woodland
- 👤 B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:55
CPC Classifications
B; B32; B32B; B32B21/00; B32B21/10; B32B7/00; B32B7/03; B27; B27D; B27D1/00; B32B21/04; B32B21/042; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/1092; Y10T156/1093
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
89 words
A method of producing a flat laminated wood product having single facing of resin-impregnated wood particles comprising: first pressing a relatively thick wet mat of resin-impregnated wood particles upon one surface of a wood veneer sheet under sufficient pressure and heat to cure the resin and bond it and the particles to the wood veneer to form a composite sheet; subsequently bonding the composite sheet to a backing of wood veneer material, using conventional laminating techniques, the particle face being directed outward at one face of the resulting lamination.
Claim 2
Independent Claim
89 words
A method of producing a flat laminated wood product having single facing of resin-impregnated wood particles comprising: first pressing a relatively thick wet mat of resin-impregnated wood particles upon one surface of a wood veneer sheet under sufficient pressure and heat to cure the resin and bond it and the particles to the wood veneer to form a composite sheet; subsequently bonding the composite sheet to a backing of wood veneer material, using conventional laminating techniques, the particle face being directed outward at one face of the resulting lamination.
Claim 3
Dependent Claim
100 words
A method as set out in claim 1 wherein the step of bonding the composite sheet to a backing of wood veneer material comprises: laying up a plurality of layers of wood veneer with a resin coating applied between adjacent wood veneer surfaces; laying up the composite sheet as an outer or face veneer at one side of said layers of wood veneer with a similar resin coating applied between the adjacent wood veneer surfaces; and subjecting the layers of wood veneer and composite sheet to sufficient heat and pressure perpendicular to the veneer surfaces to cure the resin coatings.
Claim 4
Dependent Claim
118 words
A method as set out in claim 1 wherein the step of bonding the composite sheet to a backing of wood material comprises: laying up a plurality of alternately oriented veneers in an assembly comprising a back veneer and core stock assembled thereon; applying a resin coating to the abutting veneer surfaces of the assembly; laying up the composite sheet by placement of its veneer surface in abutment with the side of the core stock opposite to the back veneer; applying a resin coating to the abutting veneer surfaces of the core stock and composite sheet; and subjecting the assembly and composite sheet to sufficient heat and pressure perpendicular to the veneer surfaces to cure the resin coatings.
Claim 5
Dependent Claim
29 words
A method as set out in claim 1, wherein the pressing of the mat and wood veneer is carried out with a cushioned caul abutting the mat material surfaces.
Claim 6
Dependent Claim
34 words
A method as set out in claim 1, wherein the pressing of the mat is carried out by pressing oppositely facing composite sheet layups separated by a resilient parting sheet separating their respective mats.
Claim 7
Dependent Claim
30 words
A method as set out in claim 1 wherein the mat of particles is placed upon the tight side of the wood veneer sheet in forming of the composite sheet.
Claim 8
Dependent Claim
15 words
A method as set out in claim 1, wherein the wood particles comprise wood shavings.
Claim 9
Independent Claim
133 words
A method of producing flat laminated veneer assemblies having one face comprising fibrous wood particles bonded by a resin binder, comprising the following steps: laying up the fibrous wood particles and resin binder as a relatively thick mat on the tight surface of a first layer of wood veneer; subjecting the wood veneer and mat to sufficient pressure and heat to cure the resin and bond the cured particle mat to the wood veneer; subsequently laying up additional layers of wood veneer and laminating resin, using the first layer of wood veneer and cured mat as a face veneer with the mat facing outwardly in the assembly, the laminating resin being applied to abutting wood veneer surfaces in each layer; and curing the laminating resin by subjecting the assembly to pressure and heat.
Claim 10
Independent Claim
133 words
A method of producing flat laminated veneer assemblies having one face comprising fibrous wood particles bonded by a resin binder, comprising the following steps: laying up the fibrous wood particles and resin binder as a relatively thick mat on the tight surface of a first layer of wood veneer; subjecting the wood veneer and mat to sufficient pressure and heat to cure the resin and bond the cured particle mat to the wood veneer; subsequently laying up additional layers of wood veneer and laminating resin, using the first layer of wood veneer and cured mat as a face veneer with the mat facing outwardly in the assembly, the laminating resin being applied to abutting wood veneer surfaces in each layer; and curing the laminating resin by subjecting the assembly to pressure and heat.
Claim 11
Dependent Claim
52 words
A method as set out in claim 8 wherein the additional layers of wood veneer comprise conventional plywood face veneers and core stock laid up in a balanced assembly, the first layer of wood veneer and bonded particle mat substituting for one of the conventional face veneers in such a plywood assembly.
References Cited (Backward Citations)
US2606138A
Cited
US2343740A
Cited
US2419614A
Cited
US2804418A
Cited
US3371003A
Cited
US3563844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |