Patent US3925857A successfully refreshed from Google Patents.
US3925857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slider for a slide fastener
Assignee: YKK Corp
•
Filing: 1974-08-08
•
Granted: 1975-12-16
•
Expires: 1994-08-08
Abstract
Abstract A slider is provided for use in a slide fastener including a pair of stringer tapes of a warp-knitted fabric each carrying a row of interlocking fastener elements on one surface thereof and having wales formed longitudinally on the other surface in parallel spaced relationship. The slider includes at least a pair of guide ridges formed on the inside surface of one of the wings of its body, the guide ridges being arranged along the respective guide channels of the slider body so as to be slidably received in the spacings between the wales of the stringer tapes. Hence, as the slider is moved along the rows of fastener elements, the element supporting portions of the stringer tapes are guided through the slider by the guide ridges sliding through the spacings between their wales.
Inventors
- 👤 Toshiyuki Kihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:48
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/24; A44B19/26; Y; Y10; Y10T; Y10T24/00; Y10T24/25; Y10T24/2561; Y10T24/2582
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
146 words
In a slide fastener having a pair of stringer tapes, rows of interlockable fastener elements each connected to a corresponding stringer tape, and a slider having guide channels therethrough for receiving said rows of fastener elements and respective adjoining portions of said stringer tapes, said slider being moveable along said rows of fastener elements and stringer tape portions to selectively couple and uncouple the fastener elements, the improvement which comprises a plurality of alternate ridges and grooves in each of said stringer tapes; and at least a pair of guide ridges disposed within said slider to extend along respective guide channels thereof, said guide ridges being positioned for sliding contact with corresponding grooves of the stringer tapes to maintain a given spacing of said tapes and fastener element rows assuring correct coupling and uncoupling of said rows of fastener elements as the slider is moved therealong.
Claim 2
Dependent Claim
146 words
In a slide fastener having a pair of stringer tapes, rows of interlockable fastener elements each connected to a corresponding stringer tape, and a slider having guide channels therethrough for receiving said rows of fastener elements and respective adjoining portions of said stringer tapes, said slider being moveable along said rows of fastener elements and stringer tape portions to selectively couple and uncouple the fastener elements, the improvement which comprises a plurality of alternate ridges and grooves in each of said stringer tapes; and at least a pair of guide ridges disposed within said slider to extend along respective guide channels thereof, said guide ridges being positioned for sliding contact with corresponding grooves of the stringer tapes to maintain a given spacing of said tapes and fastener element rows assuring correct coupling and uncoupling of said rows of fastener elements as the slider is moved therealong.
Claim 3
Dependent Claim
65 words
The improvement according to claim 1 wherein said stringer tapes are made of a warp-knitted fabric each having an upper flat surface and a lower surface, said lower surface having a plurality of wales extending longitudinally in parallel spaced relation to one another, said wales defining the ridges of the stringer tapes and the spacings between adjacent wales defining the grooves of the stringer tapes.
Claim 4
Dependent Claim
23 words
The improvement according to claim 1 wherein said guide ridges are disposed on the inner surface of a bottom wing of the slider.
Claim 5
Dependent Claim
44 words
The improvement according to claim 1 wherein said slider has a single slot opening through which both of said stringer tapes extend to define a concealed type slide fastener, said slot being defined by inwardly projecting portions of the slider bearing said guide ridges.
References Cited (Backward Citations)
US2596861A
Cited
US2888727A
Cited
US2870507A
Cited
US3002245A
Cited
US3490108A
Cited
US3714683A
Cited
US3618178A
Cited
US3820202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |