US4333903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Row of continuous slide fastener coupling elements and method of making the same
Assignee: YKK Corp
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Filing: 1979-01-31
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Granted: 1982-06-08
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Expires: 1999-01-31
Abstract
Abstract A row of continuous slide fastener coupling elements is in the form of a filamentary coil or zigzag made of thermoplastic synthetic resin. Each coupling element includes a coupling head, a pair of legs extending from the coupling head, and a connector located remotely from the coupling head and extending between one of the legs and a leg of an adjacent coupling head. The connector is heat-set intensely by being heated concentratedly for increased dimensional stability. A method of manufacturing a row of such continuous slide fastener coupling elements includes the step of heating the connectors at a temperature close to the melting point of the monofilament.
Inventors
- 👤 Hiroshi Yoshida
- 👤 Isao Hagiwara
- 👤 Shigeyuki Oodera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:22
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/10; A44B19/12; B; B29; B29D; B29D5/00; B29D5/06; Y; Y10; Y10T; Y10T24/00; Y10T24/25; Y10T24/2518; Y10T24/2523
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
143 words
A method of manufacturing a row of continuous slide fastener coupling elements, comprising the steps of: (a) transporting and bending a monolfilament of thermosplastic synthetic resin successively into a plurality of continuous turns each including a coupling head, a pair of spaced legs extending from said coupling head, and a connector located remotely from said coupling head and extending between one of said legs and a leg of an adjacent coupling element; and (b) substantially during said bending, permanently heat-setting only each said connector at least at a surface layer thereof which faces away from said coupling head at a temperature slightly below the melting point of the monofilament, and while said turns are still being transported, providing said turns a temporary heat-set at a relatively low temperature, whereby the temporarily heat-set coupling heads are stabilized in pitch by the permanently heat-set connectors.
Claim 2
Independent Claim
143 words
A method of manufacturing a row of continuous slide fastener coupling elements, comprising the steps of: (a) transporting and bending a monolfilament of thermosplastic synthetic resin successively into a plurality of continuous turns each including a coupling head, a pair of spaced legs extending from said coupling head, and a connector located remotely from said coupling head and extending between one of said legs and a leg of an adjacent coupling element; and (b) substantially during said bending, permanently heat-setting only each said connector at least at a surface layer thereof which faces away from said coupling head at a temperature slightly below the melting point of the monofilament, and while said turns are still being transported, providing said turns a temporary heat-set at a relatively low temperature, whereby the temporarily heat-set coupling heads are stabilized in pitch by the permanently heat-set connectors.
Claim 3
Dependent Claim
23 words
A method according to claim 1, said heat-setting of said connector being accomplished by application of a heated medium to each said connector.
Claim 4
Dependent Claim
12 words
A method according to claim 2, said heated medium being hot air.
Claim 5
Dependent Claim
29 words
A method according to claim 1, further including the step of inserting an elongate thermoplastic core through the row of the coupling elements simultaneously with the monofilament bending step.
Claim 6
Dependent Claim
16 words
A method according to claim 1, said heat-setting of said connector also roughening said surface layer.
Claim 7
Dependent Claim
19 words
A method according to claim 1, said heat-setting of said connector also roughening the entire body of the connector.
Claim 8
Dependent Claim
19 words
A method according to claim 1, said heat-setting of said connector extending throughout the entire body of said connector.
References Cited (Backward Citations)
US3267514A
Cited
US3262157A
Cited
US3336640A
Cited
US3412438A
Cited
GB1161016A
Cited
US3546329A
Cited
US3555135A
Cited
US3730817A
Cited
US3855671A
Cited
JPS4923874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-07 | 1989-12-07 | 1990-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-07 | 1993-12-07 | 1994-06-08 | $7700.00 | Window Closed / Lapsed |