US3616012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic laminates bending method
Assignee: SALVARANI SOC IN NOME COLLETTI
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Filing: 1968-02-14
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Granted: 1971-10-26
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Expires: 1988-02-14
Abstract
Abstract This invention refers to a method and machine for producing plastic laminate elements having a plurality of flat faces at substantially right angles to each other and with sharp corners, said method consisting in forming said flat faces on wide radius arcuate moulding surfaces.
Inventors
- 👤 Antonio Salvarani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:25
CPC Classifications
B; B32; B32B; B32B27/00; B29; B29C; B29C43/00; B29C43/02; B29C53/00; B29C53/02; B29C53/04; B29C67/00; B29C67/0011; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T156/1044
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
A method of producing in a single operation substantially U-shaped plastic laminate coatings in a die having two mating parts each having a central portion of a large radius arcuate configuration terminating at portions in which the tangential plane form an angle of about 45* with the pressing axis and adjacent planar end and portions forming an angle of about 45* with said axis and symmetrical with the ends of said arcuate surface, comprising the steps of placing an overlapping stack of resin impregnated fiborous sheets between said die parts, and pressing said sheets between said die parts at high temperature and pressure to form said shaped plastic laminate.
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |