Patent US4466847A successfully refreshed from Google Patents.
US4466847A
Expired / Lapsed
US
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Method for the continuous production of laminates
Assignee: Individual
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Filing: 1983-05-06
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Granted: 1984-08-21
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Expires: 2003-05-06
Abstract
Abstract A method for continuously producing endless laminates from paper fiber layers consisting of saturating fiber layers with hardenable heat-setting resins followed by drying said saturated fiber layers in a drying tunnel and immediately followed by passing said fiber layers through double-belt press laminating means for curing and further drying to harden said impregnated fiber layers.
Inventors
- 👤 Kurt Held
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:10
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B31; B31F; B31F5/00; B32B29/00; B32B29/002; B32B29/005; B32B37/00; B32B37/10; B32B37/1027; B32B38/00; B32B38/08; B32B38/16; B32B2260/00; B32B2260/02; B32B2260/028; B32B2260/04; B32B2260/046; B32B2317/00; B32B2317/12; B32B2433/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A method for continuously producing endless laminates from paper fiber layers consisting essentially of the sequence of (a) employing an impregnator means for saturating fiber layers with hardenable heat-setting resins so that 50-70% resins relative to the drypaper weight are absorbed immediately followed by; (b) drying said saturated fiber layers in a drying tunnel by means of highly heated ambient air, infrared or microwave radiations for minimum pre-condensation to reduce moisture content to 10-12% to result in a flexible soft paper fiber and then immediately followed by; (c) passing said fiber layers through double-belt press laminating means for curing and further drying under surface pressure of 100 to 200 Newtons/cm 2 for a sufficient period of time depending on transport speed with said pressure being simultaneously applied over a substantially large area for a pre-determined time interval while applying heat to harden said impregnated fiber.
Claim 2
Independent Claim
145 words
A method for continuously producing endless laminates from paper fiber layers consisting essentially of the sequence of (a) employing an impregnator means for saturating fiber layers with hardenable heat-setting resins so that 50-70% resins relative to the drypaper weight are absorbed immediately followed by; (b) drying said saturated fiber layers in a drying tunnel by means of highly heated ambient air, infrared or microwave radiations for minimum pre-condensation to reduce moisture content to 10-12% to result in a flexible soft paper fiber and then immediately followed by; (c) passing said fiber layers through double-belt press laminating means for curing and further drying under surface pressure of 100 to 200 Newtons/cm 2 for a sufficient period of time depending on transport speed with said pressure being simultaneously applied over a substantially large area for a pre-determined time interval while applying heat to harden said impregnated fiber.
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) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |