Patent US4250781A successfully refreshed from Google Patents.
US4250781A
Expired / Lapsed
US
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Apparatus for cutting off a pair of slide fastener stringers
Assignee: YKK Corp
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Filing: 1979-04-13
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Granted: 1981-02-17
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Expires: 1999-04-13
Abstract
Abstract A pair of interlocked slide fastener stringers having a plurality of sliders respectively on their longitudinally spaced chains of coupling elements fed over a guide table as the sliders are sensed one at a time by a feeler lever pivotally mounted on the guide table. A stop lever pivotable with respect to the guide table has a stop finger that projects into one of element-free spaces between the chains in response to the pivotal movement of the feeler lever due to engagement thereof with the slider. The stop finger, while not actuated, is withdrawn out of the way, and thus does not interfere with the sliders moving with the slide fastener stringers.
Inventors
- 👤 Hiroshi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:15
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/42; B; B26; B26D; B26D5/00; B26D5/20; B26D5/30; B26D5/32; Y; Y10; Y10S; Y10S83/00; Y10S83/921; Y10T; Y10T83/00; Y10T83/444; Y10T83/4458; Y10T83/446; Y10T83/4463; Y10T83/4493; Y10T83/463; Y10T83/4632; Y10T83/525; Y10T83/531; Y10T83/541; Y10T83/543
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
271 words
An apparatus for cutting off a pair of interlocked fastener stringers including a plurality of longitudinally spaced chains of coupling elements with a plurality of sliders mounted respectively thereon, there being a plurality of element-free spaces between the longitudinally spaced chains, said apparatus comprising: a guide table for supporting the slide fastener stringers thereon; means for feeding the slide fastener stringers longitudinally over said guide table; slider sensing means on said guide table for sensing one of the sliders at a time; space sensing means on said guide table for sensing one of the element-free spaces at a time in response to the actuation of said slider sensing means, so as to stop the slide fastener stringers; means for cutting off the slide fastener stringers across said one of the spaces upon stoppage of said slide fastener stringers; said slider sensing means comprising a support mounted on said guide table; a feeler lever pivotally mounted on said support; spring means acting between said support and said feeler lever for normally biasing said feeler lever against the slide fastener stringers; switch means actuatable in response to pivotal movement of said feeler lever due to engagement thereof with said one of said sliders; said space sensing means comprising a stop lever pivotable with respect to said guide table; stop lever actuating means for actuating said stop lever; said stop lever having means insertable into said one of the spaces in response to the energization of said stop lever actuating means; and a time switch for energizing said stop lever actuating means a predetermined interval of time after the actuating of said switch means.
Claim 2
Independent Claim
271 words
An apparatus for cutting off a pair of interlocked fastener stringers including a plurality of longitudinally spaced chains of coupling elements with a plurality of sliders mounted respectively thereon, there being a plurality of element-free spaces between the longitudinally spaced chains, said apparatus comprising: a guide table for supporting the slide fastener stringers thereon; means for feeding the slide fastener stringers longitudinally over said guide table; slider sensing means on said guide table for sensing one of the sliders at a time; space sensing means on said guide table for sensing one of the element-free spaces at a time in response to the actuation of said slider sensing means, so as to stop the slide fastener stringers; means for cutting off the slide fastener stringers across said one of the spaces upon stoppage of said slide fastener stringers; said slider sensing means comprising a support mounted on said guide table; a feeler lever pivotally mounted on said support; spring means acting between said support and said feeler lever for normally biasing said feeler lever against the slide fastener stringers; switch means actuatable in response to pivotal movement of said feeler lever due to engagement thereof with said one of said sliders; said space sensing means comprising a stop lever pivotable with respect to said guide table; stop lever actuating means for actuating said stop lever; said stop lever having means insertable into said one of the spaces in response to the energization of said stop lever actuating means; and a time switch for energizing said stop lever actuating means a predetermined interval of time after the actuating of said switch means.
Claim 3
Dependent Claim
64 words
An apparatus according to claim 1, said cutting means comprising a fixed blade and a movable blade between which the slide fastener stringers are movable, and switch means energizable in response to the coaction of said movable blade with said fixed blade to cut off the slide fastener stringers, said space sensing means being de-energizable in response to the actuation of said switch means.
Claim 4
Dependent Claim
57 words
An apparatus according to claim 1, for cutting off a pair of interlocked slide fastener stringers with a pair of end stops mounted on the ends of each chain, further including means on said guide table for holding one of the sliders at a time against one of the end stops on corresponding one of the chains.
Claim 5
Dependent Claim
47 words
An apparatus according to claim 3, said slider holding means comprising a housing mounted on said guide table, a pair of spaced fingers slidably mounted in said housing for jointly gripping said one of the sliders therebetween, and spring means normally biasing said fingers toward each other.
Claim 6
Dependent Claim
70 words
An apparatus according to claim 1, said space sensing means further including slide means slidable with respect to said guide table, said stop lever being pivotally mounted on said slide means, said slide means being slidable when said stop means engages said one end of the chain, and actuator means on said slide means for acting on said switch means in response to the sliding movement of said slide means.
Claim 7
Dependent Claim
30 words
An apparatus according to claim 5, said space sensing means further including spring means acting on said slide means for normally urging said actuator means away from said switch means.
Claim 8
Dependent Claim
41 words
An apparatus according to claim 6, said space sensing means further including a block fixed with respect to said guide table, said slide means being slidably supported by said block, said spring means acting between said block and said slide means.
References Cited (Backward Citations)
US3776078A
Cited
US4043232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |