Hooked surface of a hook and loop type fastener
Abstract
Abstract A METHOD IS DISCLOSED FOR PRODUCING THE HOOKED SURFACE OF A HOOK AND LOOP TYPE FASTENER BY TREATING A STARTING FABRIC MATERIAL HAVING A PILE OF UPSTANDING THREADS. THE TREATMENT COMPRISES IMPREGNATING THE TREADS AND PILE WITH A LIQUID PLASTIC MONOMER WHAVING THE CAPABLILITY OF BEING CONVERTED BY THE APPLICATION THERETO OF A SUITABLE FORM OF ENERGY TO A FLEXIBLE SOLID, APPLYING HEAT OR OTHER SUITABLE FORM OF ENERGY TO THE UNDERSIDE OF THE STARTING MATERIAL TO SET THE LOWER PORTION OF THE THREADS INTO A RELATIVELY PERMANENT AND STIFFENED SHAPE AND THEN SUB- JECTING THE OTHER SIDE OF SAID STARTING MATERIAL SIMULTANEOUSLY TO A PRESSURE AND HEAT OR OTHER SUITABLE FORM OF ENERGY TO BEND AND SET THE UPPER PORTIONS OF THE THREADS INTO THE FORM OF HOOKING ELEMENTS.
Inventors
- 👤 G Erb
Bibliographic Details
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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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |