US3971868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabric tape for slide fastener stringers with means to prevent unraveling at its severed ends
Assignee: YKK Corp
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Filing: 1975-02-04
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Granted: 1976-07-27
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Expires: 1995-02-04
Abstract
Abstract A stringer tape is made of a woven fabric the warp and/or weft of which is constituted of yarns composed of synthetic fibers or filaments or of blends of synthetic and other fibers or filaments. At each end of the stringer tape, formed by severance of the tape from a continuous length of such fabric tape, there are formed a plurality of thermally fused regions to prevent the unraveling of the fabric. The thermally fused regions are spaced from each other in the transverse direction of the tape.
Inventors
- 👤 Ryukichi Murai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:54
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/24; A44B19/34; A44B19/38; Y; Y10; Y10T; Y10T24/00; Y10T24/25; Y10T428/00; Y10T428/24; Y10T428/24777; Y10T428/24793
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
100 words
In a slide fastener stringer tape which is made of a fabric at least partly including synthetic fibers and which has at least one end formed by severance of the stringer tape from a continuous length of such tape, the improvement comprising a plurality of separated thermally fused regions formed at the severed end portion of said stringer tape to prevent the unraveling of the fabric, said thermally fused regions being spaced apart from each other in the transverse direction of said stringer tape, in each thermally fused region, the synthetic fibers therewithin being fused to bond the fabric together.
Claim 2
Dependent Claim
100 words
In a slide fastener stringer tape which is made of a fabric at least partly including synthetic fibers and which has at least one end formed by severance of the stringer tape from a continuous length of such tape, the improvement comprising a plurality of separated thermally fused regions formed at the severed end portion of said stringer tape to prevent the unraveling of the fabric, said thermally fused regions being spaced apart from each other in the transverse direction of said stringer tape, in each thermally fused region, the synthetic fibers therewithin being fused to bond the fabric together.
Claim 3
Dependent Claim
22 words
The improvement of claim 1, wherein each of said thermally fused regions is elongated in the longitudinal direction of 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) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |