US3977053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide fastener stringer
Assignee: YKK Corp
•
Filing: 1974-09-24
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Granted: 1976-08-31
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Expires: 1994-09-24
Abstract
Abstract In a slide fastener stringer having a row of discrete fastener elements arranged along one longitudinal edge thereof and each comprising a coupling head at its front end and a pair of parallel spaced legs extending rearwardly from the coupling head, the rear end portions of the legs of each fastener element are flattened into plate-like shape, with steps formed between these flattened rear end portions of the respective legs and their remaining portions. The flattened rear end portions of the legs of each fastener element are embedded into the stringer tape from both surfaces thereof, to such a degree that the outer surfaces of the flattened rear end portions are flush with the corresponding surfaces of the stringer tape, thereby providing slideways for the marginal guide flanges of a slider traveling along the fastener elements.
Inventors
- 👤 Ikuo Takamatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:23
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/24; A44B19/40; A44B19/403; A44B19/02; A44B19/04; A61; A61P; A61P35/00; Y; Y10; Y10T; Y10T24/00; Y10T24/25; Y10T24/2539; Y10T24/2557
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
167 words
In a slide fastener having a pair of opposed stringer tapes each bearing a row of fastener elements and a slider moveable along such rows of fastener elements to put same into and out of interengagement, the improvement which comprises each of said fastener elements including a coupling head at its front end and a pair of substantially parallel spaced legs extending rearwardly from said coupling head, flattened portions formed at the rear ends of said legs of each of said fastener elements to provide slideways for a slider, said flattened portions being buried into said stringer tape from both surfaces thereof to such an extent that the outer surfaces of the respective flattened portions are in substantially coplanar relationship to corresponding surfaces of said stringer tape adjacent said flattened portions, and steps formed between said flattened portions of the respective legs of each of said fastener elements and the remaining portions thereof, and marginal flanges on said slider disposed for sliding contact engagement with said slideways.
Claim 2
Dependent Claim
167 words
In a slide fastener having a pair of opposed stringer tapes each bearing a row of fastener elements and a slider moveable along such rows of fastener elements to put same into and out of interengagement, the improvement which comprises each of said fastener elements including a coupling head at its front end and a pair of substantially parallel spaced legs extending rearwardly from said coupling head, flattened portions formed at the rear ends of said legs of each of said fastener elements to provide slideways for a slider, said flattened portions being buried into said stringer tape from both surfaces thereof to such an extent that the outer surfaces of the respective flattened portions are in substantially coplanar relationship to corresponding surfaces of said stringer tape adjacent said flattened portions, and steps formed between said flattened portions of the respective legs of each of said fastener elements and the remaining portions thereof, and marginal flanges on said slider disposed for sliding contact engagement with said slideways.
Claim 3
Dependent Claim
28 words
A slide fastener stringer as set forth in claim 1, further including at least a row of stitches adapted to secure said fastener elements to said stringer tape.
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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) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |