Patent US3704490A successfully refreshed from Google Patents.
US3704490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling element for slide fasteners
Assignee: Opti Holding AG
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Filing: 1971-10-12
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Granted: 1972-12-05
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Expires: 1991-10-12
Abstract
Abstract A coupling element for a slide fastener consists of a strip of thermoplastic synthetic resin material bent or folded about a longitudinal axis into a U-section or J-section so that a wide leg directly overlies a narrow leg and overhangs the latter to form a guiding edge of the slider. The bight of the folded strip is provided with spaced-apart coupling formations or heads matingly engageable with the heads of the opposing coupling element in a slide-fastener stringer. Openings in the strip are provided to clear a needle which serves to stitch the coupling element to a support tape or directly onto the fabric of the garment, while formations around these openings on the underside of the folded strip engage the fabric to prevent shifting of the coupling element relative to the fabric.
Inventors
- 👤 Harry Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:58
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/10; A44B19/14; Y; Y10; Y10T; Y10T24/00; Y10T24/25; Y10T24/2536; Y10T24/2539; Y10T24/2557
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
169 words
In a slide fastener having a support layer, the improvement which comprises a coupling element overlying a surface of said layer and including a continuous synthetic-resin strip folded about a longitudinal axis to form a relatively narrow leg engaging said layer and a relatively wide leg overlying said narrow leg and joined thereto along a bight of said strip; a multiplicity of coupling formations formed along said bight in longitudinally equispaced relationship for interengagement with corresponding coupling formations of a mating coupling element; a slider guide flange formed by a portion of said wide leg overhanging said narrow leg on a side of said strip opposite said bight, said strip being formed inwardly of said bight with a row of longitudinally spaced needle-passing openings; anchoring formations provided on said narrow leg in the region of said window and engaging said layer for limiting relative displacement of said layer and said coupling element; and a row of stitching fastening said coupling element to said layer and passing through said window.
Claim 2
Dependent Claim
169 words
In a slide fastener having a support layer, the improvement which comprises a coupling element overlying a surface of said layer and including a continuous synthetic-resin strip folded about a longitudinal axis to form a relatively narrow leg engaging said layer and a relatively wide leg overlying said narrow leg and joined thereto along a bight of said strip; a multiplicity of coupling formations formed along said bight in longitudinally equispaced relationship for interengagement with corresponding coupling formations of a mating coupling element; a slider guide flange formed by a portion of said wide leg overhanging said narrow leg on a side of said strip opposite said bight, said strip being formed inwardly of said bight with a row of longitudinally spaced needle-passing openings; anchoring formations provided on said narrow leg in the region of said window and engaging said layer for limiting relative displacement of said layer and said coupling element; and a row of stitching fastening said coupling element to said layer and passing through said window.
Claim 3
Dependent Claim
22 words
The improvement defined in claim 1, further comprising a channel formed in said wide leg between said windows and receiving said stitching.
Claim 4
Dependent Claim
20 words
The improvement defined in claim 2 wherein said windows have outwardly divergent flanks for guiding a needle into said windows.
Claim 5
Dependent Claim
23 words
The improvement defined in claim 3 wherein said anchoring formations are rows of beveled ridges defining edges on opposite sides of said windows.
Claim 6
Dependent Claim
32 words
The improvement defined in claim 1 wherein said coupling formations include coupling heads and recesses complementary to said heads and formed in said strip between them, said windows opening into said recesses.
Claim 7
Dependent Claim
28 words
The improvement defined in claim 1 wherein said windows are of generally rectangular configuration and are aligned along their diagonals in the longitudinal direction of the coupling element.
Claim 8
Dependent Claim
26 words
The improvement defined in claim 1 wherein said wide and narrow legs are provided with formfitting members remote from said bight and defining said guide flange.
Claim 9
Dependent Claim
14 words
The improvement defined in claim 7 wherein said formfitting members are of generally Z-shape.
Claim 10
Dependent Claim
19 words
The improvement defined in claim 1 wherein said coupling element is composed of a thermoplastic extrudable or moldable material.
Claim 11
Dependent Claim
17 words
The improvement defined in claim 1, further comprising a slider having a ledge engageable beneath said flange.
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |