Patent US3718725A successfully refreshed from Google Patents.
US3718725A
Expired / Lapsed
US
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Method for making hook fabric material for fasteners
Assignee: Velcro Industries BV
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Filing: 1970-11-17
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Granted: 1973-02-27
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Expires: 1990-11-17
Abstract
Abstract Methods are disclosed including the use of heat and chemicals for converting loops upstanding from a base fabric into hook members suitable for use in hook and loop fasteners.
Inventors
- 👤 H Hamano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:00
CPC Classifications
D; D06; D06C; D06C29/00; A; A44; A44B; A44B18/00; A44B18/0046; A44B18/0061; A44B18/0065; B; B29; B29C; B29C59/00; B29C59/02; B29C59/022; B29C59/025; B29C67/00; B29C67/0044; D04; D04B; D04B21/00; D04B21/02; D04B21/04; D04B21/20; D04B35/00; D06C13/00; D06C13/08; B29C2793/00; B29L; B29L2031/00; B29L2031/727; B29L2031/729; B29L2031/765; D10; D10B; D10B2501/00; D10B2501/06; D10B2501/063; D10B2501/0632; Y; Y10; Y10S; Y10S425/00; Y10S425/041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
The method according to claim 1 wherein the step of applying heat and pressure is accomplished by passing a heated platen linearly along said rows of loops and the step of cooling and pressing is accomplished by passing a cooling platen linearly along said rows of loops.
Claim 2
Independent Claim
106 words
The method of forming knob-like projections from a multiplicity of pile loops upstanding from a flat base material to form a hooked pile surface suitable for use as a fastener element comprising, taking a base sheet material having rows of upstanding loops made of a chemically deformable material, dipping the ends of said loops into a chemical solvent to cause separation of the summits of said loops into separate upstanding legs while simultaneously forming the ends of said upstanding legs into softened partially formed knob-like projections and applying pressure to the ends of said legs to crush and to form the softened ends into knob-like projections.
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |