Method of making a mold
Abstract
Abstract THE METHOD COMPRISES MAKING A RIGID MOLD FROM A RIGID PATTERN, WITHOUT, IN THE COURSE OF MAKING THE RIGID MOLD, DESTROYING THE RIGID PATTERN. IN THE METHOD, THE RIGID PATTERN IS FIRST FORMED OF A MATERIAL SUCH AS WOOD. IT IS DESIRED THAT THE FINAL MOLD HAVE A CAVITY WITH A TEXTURED SURFACE TO SIMULATE A MATERIAL SUCH AS GRAINED LEATHER. CONSEQUENTLY, A SHEET OF PLASTIC MATERIAL HAVING THE DESIRED TEXTURED SURFACE ON ONE FACE THEREOF IS FORMED AROUND THE PATTERN BY USE OF HEAT AND ALLOWED TO SET TO FORM THE DESIRED TEXTURED SURFACE EXTERIORLY OF THE PATTERN. A FLEXIBLE MOLD OF A MATERIAL SUCH AS RUBBER IS THEN FORMED AROUND THE PATTERN. THE PATTERN IS REMOVED FROM THE FLEXIBLE MOD WITHOUT DAMAGE TO EITHER THE PATTERN OR THE MOLD. A SECOND PATTERN OF FLEXIBLE MATERIAL SUCH AS RUBBER IS THEN FORMED IN THE FIRST MOLD. THE FLEXIBLE PATTERN AND FLEXIBLE MOLD MAY BE SEPARATED WITHOUT DESTROYING EITHER. FINALLY, A DESIRED RIGID MOLD IS FORMED AROUND THE FLEXIBLE PATTERN BY LAMINATING ALTERNATE LAYERS OF RESIN AND GLASS FIBRE THEREON. THE FLEXIBLE PATTERN IS REMOVABLE FROM THE RIGID MOLD WHEREUPON THE RIGID MOLD IS READY FOR USE IN CASTING.
Inventors
- 👤 Richard G Maher
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |