Patent US3855671A successfully refreshed from Google Patents.
US3855671A
Expired / Lapsed
US
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Zip fastener construction
Assignee: YKK Corp
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Filing: 1972-07-26
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Granted: 1974-12-24
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Expires: 1992-07-26
Abstract
Abstract A zip fastener construction is provided with a stiffening or holding core member extending longitudinally through a row of interlocking elements in the form of a spring coil, said core being securely retained in place against displacement particularly in the transverse direction. The coil element is provided with a space between its arm portions, which space is reduced immediately adjacent the core to hold the latter in abutting engagement with the inner wall of a base portion of the element.
Inventors
- 👤 Y Fujisaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:39
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/24; A44B19/40; A44B19/406; Y; Y10; Y10T; Y10T24/00; Y10T24/25; Y10T24/2518; Y10T24/2523; Y10T24/2525
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
196 words
In a slide fastener, a. a stringer; b. a row of coupling elements comprising, a plurality of coupling elements each having a coupling head and a pair of arms extending from said coupling head in a common direction transverse to a longitudinal direction of said row of coupling elements and defining a space therebetween, and a plurality of base portions connecting next adjacent coupling elements at ends of said arms remote from said coupling heads, one of said arms of each of said coupling elements having an inwardly bulging portion to define a narrow region more narrow than a portion adjacent said base portions of each of the spaces between each of said pair of arms; c. an elongated core having a transverse width greater than the narrow regions of the spaces between said pairs of arms, said core being disposed in and solely at one end of each of said spaces between each of said pair of arms adjacent said base portions and maintained engaged with said base portions by said bulging portions of said pairs of arms to maintain alignment between said coupling elements; and d. threads securing said coupling elements to said stringers.
Claim 2
Dependent Claim
196 words
In a slide fastener, a. a stringer; b. a row of coupling elements comprising, a plurality of coupling elements each having a coupling head and a pair of arms extending from said coupling head in a common direction transverse to a longitudinal direction of said row of coupling elements and defining a space therebetween, and a plurality of base portions connecting next adjacent coupling elements at ends of said arms remote from said coupling heads, one of said arms of each of said coupling elements having an inwardly bulging portion to define a narrow region more narrow than a portion adjacent said base portions of each of the spaces between each of said pair of arms; c. an elongated core having a transverse width greater than the narrow regions of the spaces between said pairs of arms, said core being disposed in and solely at one end of each of said spaces between each of said pair of arms adjacent said base portions and maintained engaged with said base portions by said bulging portions of said pairs of arms to maintain alignment between said coupling elements; and d. threads securing said coupling elements to said stringers.
Claim 3
Dependent Claim
60 words
In a slide fastener according to claim 1, wherein one of said arms of each of said pairs of arms is flexible, and wherein said threads comprise means inwardly flexing said flexible arms of each of said pairs of arms to form said inwardly bulging portions defining the narrow region of the space between each of said pair of arms.
Claim 4
Dependent Claim
40 words
In a slide fastener according to claim 2, wherein the other of said arms of each of said pairs of arms is flexible, and said threads comprise means inwardly flexing both flexible arms of each of said pair of arms.
Claim 5
Dependent Claim
42 words
In a slide fastener according to claim 1, wherein one arm of each of said pair of arms is provided with a recess in a surface opposite said space between said pair of arms, and said threads being received in said recess.
Claim 6
Dependent Claim
38 words
In a slide fastener according to claim 1, wherein both arms of said pairs of arms are provided with an inwardly bulging portion to define the narrow region of the space between each of said pair of arms.
Claim 7
Dependent Claim
16 words
In a slide fastener according to claim 1, wherein said core is made of thermosetting plastic.
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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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |