Method for producing laminated structures
Abstract
Abstract POSTFORMING FACING SHEETS SUCH AS THE C-STAGE LAMINATES ARE BONDED TO AND AROUND THE RETURNING PERIPHERAL EDGES OF A PLANAR POLYGONAL CORE BY A PROCESS INVOLVING HEATING ONLY THE PERIPHERAL OUTER PORTIONS OF THE SHEET AND BONDING THE OUTER PORTIONS OF THE SHEET TO THE CORE WITH A HEAT ACTIVATED ADHESIVE WHILE THE MAIN PORTION OF THE SHEET IS BONDED TO THE CORE BY A CONTACT ADHESIVE. THE APPARATUS FOR THIS METHOD HAS A SUPPORT SURFACE SURROUNDED BY TWO SETS OF HEATING BARS WHICH HEAT ONLY THE OUTER PORTIONS OF THE SHEET WITH THE OUTER SET OF HEATING BARS BEING MOVABLE RELATIVE TO THE CORE TO WIPE THE SHEET AROUND THE CORE AFTER THE SHEET IS HEATED TO POSTFORMING TEMPERATURE BY THE HEATER BARS. THE APPARATUS HAS A LOWER MECHANISM COMPRISING THE SUPPORT AND HEATERS AND AN UPPER MECHANISM HAVING ELEMENTS WHICH EXERT DOWNWARD PRESSURE TO ENABLE POSITIONING HEATING AND BENDING OF THE SHEET TO THE CORE.
Inventors
- 👤 Gilford E Dyal
Bibliographic Details
Claims Analysis
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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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |