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Patent US4340439A successfully refreshed from Google Patents.
US4340439A
Expired / Lapsed
US
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Process of using a cushion for laminating operations
Assignee: Formica Technology Inc
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Filing: 1981-02-10
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Granted: 1982-07-20
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Expires: 2001-02-10
Abstract
Abstract Cellulosic paper sheets interleaved with sheets of a thermoplastic material having a glass transition point below about 100° C. and a melting point of about 125° C. or more provide a cushion for use in laminating operations. The thermoplastic sheets employed in the cushion have an individual thickness ranging from about 2 to 20 mils and a combined thickness of at least 5 mils. Such a cushion provides a long-term, reuseable cushion for laminating operations.
Inventors
- 👤 Harold C. Giesler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:23
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/06; B30B15/061; Y; Y10; Y10T; Y10T156/00; Y10T156/16; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24959; Y10T428/26; Y10T428/269; Y10T428/31504; Y10T428/31507; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A process for producing a heat and pressure consolidated laminate which comprises heat and pressure consolidating a laminate assembly while employing, as a pressure cushion, at least two cellulosic sheets and at least one thermoplastic sheet having a glass transition point below 100° C. and a melting point of about 125° C. or more wherein the thermoplastic sheet or sheets have an individual thickness ranging from about 2 to 20 mils and a combined thickness greater than about 5 mils and wherein the individual thermoplastic sheets are interleaved between the cellulosic paper sheets.
Claim 2
Dependent Claim
93 words
A process for producing a heat and pressure consolidated laminate which comprises heat and pressure consolidating a laminate assembly while employing, as a pressure cushion, at least two cellulosic sheets and at least one thermoplastic sheet having a glass transition point below 100° C. and a melting point of about 125° C. or more wherein the thermoplastic sheet or sheets have an individual thickness ranging from about 2 to 20 mils and a combined thickness greater than about 5 mils and wherein the individual thermoplastic sheets are interleaved between the cellulosic paper sheets.
References Cited (Backward Citations)
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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) | 1985-07-19 | 1986-01-18 | 1986-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-19 | 1990-01-18 | 1990-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-19 | 1994-01-18 | 1994-07-20 | $7700.00 | Window Closed / Lapsed |