Patent US3435517A successfully refreshed from Google Patents.
Patent US4004327A successfully refreshed from Google Patents.
US4004327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide fastener
Assignee: YKK Corp
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Filing: 1975-07-08
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Granted: 1977-01-25
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Expires: 1995-07-08
Abstract
Abstract There is provided a slide fastener having a pair of oppositely disposed carrier tapes each carrying on and along one longitudinal beaded edge a series of discrete fastener elements. The fastener elements are each provided with a coupling head and a pair of legs extending from the coupling head and having oppositely disposed inner wall portions. There are formed a plurality of ledges integral with the element legs and projecting from the oppositely disposed inner wall portions. The ledges are smaller in thickness than the element legs.
Inventors
- 👤 Takeo Fukuroi
- 👤 Moriyoshi Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:35
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/24; A44B19/40; A44B19/403; A44B19/02; A44B19/04; A44B19/06; Y; Y10; Y10T; Y10T24/00; Y10T24/25; Y10T24/2539; Y10T24/255; Y10T24/2554; Y10T24/2557; Y10T24/2559
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
A slide fastener including a pair of oppositely disposed carrier tapes each carrying on and along one longitudinal beaded edge a series of discrete fastener elements, said fastener elements each comprising a coupling head, a pair of legs extending from the coupling head and having oppositely disposed inner wall portions, and a plurality of teeth formed integral with said legs and projecting from said oppositely disposed inner wall portions, each of said teeth including a pair of inclined faces extending from an outer edge to an inner wall portion and lying in a direction transverse to said longitudinal direction thereby forming a tooth generally triangular in shape, said tooth also having two opposite generally flat faces generally perpendicular to said inner wall, each said flat face lying in a plane generally perpendicular to said longitudinal direction, the thickness between said flat faces being smaller than said legs as measured along the longitudinal direction of said beaded edge, each of said teeth on one leg being staggered and at a predetermined pitch spacing with respect to a corresponding tooth on the other leg as measured along said longitudinal direction, said teeth being disposed in gripping engagement with said beaded edge to secure the fastener elements thereto.
Claim 2
Dependent Claim
205 words
A slide fastener including a pair of oppositely disposed carrier tapes each carrying on and along one longitudinal beaded edge a series of discrete fastener elements, said fastener elements each comprising a coupling head, a pair of legs extending from the coupling head and having oppositely disposed inner wall portions, and a plurality of teeth formed integral with said legs and projecting from said oppositely disposed inner wall portions, each of said teeth including a pair of inclined faces extending from an outer edge to an inner wall portion and lying in a direction transverse to said longitudinal direction thereby forming a tooth generally triangular in shape, said tooth also having two opposite generally flat faces generally perpendicular to said inner wall, each said flat face lying in a plane generally perpendicular to said longitudinal direction, the thickness between said flat faces being smaller than said legs as measured along the longitudinal direction of said beaded edge, each of said teeth on one leg being staggered and at a predetermined pitch spacing with respect to a corresponding tooth on the other leg as measured along said longitudinal direction, said teeth being disposed in gripping engagement with said beaded edge to secure the fastener elements thereto.
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) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |