US4504347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of hot pressing a synthetic-resin laminate
Assignee: Furnier und Sperrholzwerk JF Werz Jr KG Werzalit Pressholzwerk
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Filing: 1981-04-24
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Granted: 1985-03-12
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Expires: 2001-04-24
Abstract
Abstract A nonswelling mass of fibers and a thermosetting synthetic resin are cold pressed into a preform body having a predetermined primary volume. This preform body is then hot pressed into an intermediate body having a secondary volume smaller than the primary volume. The press is then opened and a thermosetting synthetic-resin skin is applied to at least a portion of the surface of the intermediate body. Thereafter the skin and body are together pressed into a final integrated body having a volume smaller than the secondary volume. The skin is applied to the intermediate body as a foil.
Inventors
- 👤 Edmund Munk
- 👤 Herbert Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:02
CPC Classifications
B; B27; B27N; B27N5/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
201 words
A method of making a shaped body with a skin, comprising the following steps in the order named: cold pressing a mass of fibers and a thermosetting binder between a pair of mold halves to form a preform body of a predetermined volume; placing said preform body between a pair of hot mold halves; introducing a spacer between said hot mold halves to define a predetermined distance between said hot mold halves; hot pressing said preform body between said hot mold halves at a temperature above the thermal activation temperature of the binder to convert said preform body into an intermediate body having a secondary volume and a thickness which is smaller than that of said preform body and defined in accordance with said predetermined distance, the thickness of said intermediate body being greater than that of a final integrated body; opening said hot mold halves so as to at least partly dry and degas the intermediate body; removing said spacer from said hot mold halves; placing a skin onto at least a portion of one of the end faces of said intermediate body; and hot pressing said skin and thus degassed intermediate body together to form the final integrated body.
Claim 2
Independent Claim
201 words
A method of making a shaped body with a skin, comprising the following steps in the order named: cold pressing a mass of fibers and a thermosetting binder between a pair of mold halves to form a preform body of a predetermined volume; placing said preform body between a pair of hot mold halves; introducing a spacer between said hot mold halves to define a predetermined distance between said hot mold halves; hot pressing said preform body between said hot mold halves at a temperature above the thermal activation temperature of the binder to convert said preform body into an intermediate body having a secondary volume and a thickness which is smaller than that of said preform body and defined in accordance with said predetermined distance, the thickness of said intermediate body being greater than that of a final integrated body; opening said hot mold halves so as to at least partly dry and degas the intermediate body; removing said spacer from said hot mold halves; placing a skin onto at least a portion of one of the end faces of said intermediate body; and hot pressing said skin and thus degassed intermediate body together to form the final integrated body.
Claim 3
Dependent Claim
50 words
The method as defined in claim 1, wherein said step of placing a skin on at least a portion of said end face of said intermediate body comprises the steps of placing a decorative sheet onto said end face and placing a sheet of thermosetting resin over said decorative sheet.
Claim 4
Dependent Claim
23 words
The method defined in claim 1, wherein said skin is of synthetic-resin material and is applied to said intermediate body as a foil.
Claim 5
Dependent Claim
29 words
The method defined in claim 1, wherein said skin is a pair of sheets, at least one of which is at least partially composed of a thermosetting synthetic resin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |