Pultrusion machine
Abstract
Abstract THE INVENTION IS EMBODIED IN A DEVICE FOR CONTINUOUSLY FORMING STOCK MATERIAL FROM A COMBINATION OF FILAMENTS IMPREGNATED WITH SYNTHETIC THERMOSETTING PLASTIC RESIN INTO WHICH AN APPROPRIATE HARDENER IS ENTRAINED, FOLLOWED BY WHAT AMOUNTS TO EXTREMELY RAPID CURING WHILE THE STOCK PASES THROUGH A FORMING DIE THROUGH WHICH IT IS PULLED BY A HAND-OVER-HAND TYPE OF PULLING DEVICE. AN IMPREGNATING OR COMPOSING TUBE WHEREIN THE FILAMENT IS IMPREG- NATED WITH CATALYZED RESIN, HEREINAFTER TERMED A COMPOSING TUBE, IS OF SUCH DESIGN AND CONSTRUCTION THAT THE ACTION ASSITS IN PUSHING THE STOCK THROUGH THE PROCESS PROVIDING A COMBINED ACTION WHICH GIVES RISE TO THE DESIGNATION "PULTRUSION MACHINE".
Inventors
- 👤 William Brandt Goldsworthy
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |