US3776078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cutting continuous slide fastener chains into slide fasteners of predetermined length
Assignee: CARBIDE FORM GRINDING Inc
•
Filing: 1972-08-15
•
Granted: 1973-12-04
•
Expires: 1992-08-15
Abstract
Abstract Apparatus for cutting a continuous slide fastener chain in transverse direction at successive portions of the chain which are not provided with coupling elements and in which a gap is formed between inner edges of the two stringers forming the chain to thereby produce individual fasteners from the chain. The apparatus comprises means for moving the chain in longitudinal direction and a stop finger arranged to ride on the engaged coupling elements and to drop into a gap between the edges of the stringers to thereby engage a bottom stop connecting the two stringers at the end of each gap. The stop finger is temporarily maintained in the dropped position to thereby stop further feeding of the chain and to initiate movement of a cutting blade to cut the chain downstream of the finger in transverse direction, whereafter the finger is released and the cycle repeated at the next gap.
Inventors
- 👤 M Perlman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:50
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/42; B; B26; B26D; B26D5/00; B26D5/38; Y; Y10; Y10S; Y10S83/00; Y10S83/921; Y10T; Y10T83/00; Y10T83/444; Y10T83/4458; Y10T83/446; Y10T83/4463; Y10T83/4465; Y10T83/4491; Y10T83/4493; Y10T83/525; Y10T83/541; Y10T83/543
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
463 words
An apparatus for cutting individual slide fasteners from a continouus slide fastener chain having two stringers the inner edges of which are provided along first portions of the chain with interengaged coupling elements and having second portions alternating with said first portions and being free of coupling elements to define a gap between the inner edges of said second portions and in which the two stringers are connected to each other at one end of each gap by a bottom stop, and in which the two stringers of the chain are cut transversely in the region of each gap, said apparatus comprising support means, cutting means on the support means and including a cutting blade movable between a rest position and a cutting position; moving means for moving said blade between said positions thereof; feeding means mounted on said support means for moving the chain in longitudinal direction, said feeding means being arranged adjacent said blade and upstream of the latter, as considered in the direction of movement of the chain; a stop finger movable between an inactive position in which an end of said finger rides on the engaged coupling elements of the first finger portions and a stopping position in which said end has moved into a gap formed between the inner edges of the second stringer portions to thereby engage with a curved front edge thereof a bottom stop at the end of the respective gap, said stop finger being arranged with respect to said feeding means so that the latter engage the stringers downstream of said front edge of said stop finger to pull the respective bottom stop against said curved front edge of said finger so that the latter tends to move back to its inactive position; locking means mounted on said support means movable between an inactive position and a locking position and cooperating in said locking position with said stop finger to prevent the latter after its end has moved into said gap to move to its inactive position; and control means cooperating with said feeding means, said locking means and said moving means for stopping operation of said feeding means when said end of said stop finger after having moved into a gap engages the bottom stop at the end of the stop while said locking means is in said locking position, for then moving said blade from its rest to its active position and back to its rest position and thereafter moving said locking means to its inactive position and simultaneously restarting said drive means so that said curved edge on said stop finger will cause the latter to move to its inactive position, due to the camming action imparted to said curved dege of said stop finger by the bottom stop pulled thereagainst.
Claim 2
Independent Claim
463 words
An apparatus for cutting individual slide fasteners from a continouus slide fastener chain having two stringers the inner edges of which are provided along first portions of the chain with interengaged coupling elements and having second portions alternating with said first portions and being free of coupling elements to define a gap between the inner edges of said second portions and in which the two stringers are connected to each other at one end of each gap by a bottom stop, and in which the two stringers of the chain are cut transversely in the region of each gap, said apparatus comprising support means, cutting means on the support means and including a cutting blade movable between a rest position and a cutting position; moving means for moving said blade between said positions thereof; feeding means mounted on said support means for moving the chain in longitudinal direction, said feeding means being arranged adjacent said blade and upstream of the latter, as considered in the direction of movement of the chain; a stop finger movable between an inactive position in which an end of said finger rides on the engaged coupling elements of the first finger portions and a stopping position in which said end has moved into a gap formed between the inner edges of the second stringer portions to thereby engage with a curved front edge thereof a bottom stop at the end of the respective gap, said stop finger being arranged with respect to said feeding means so that the latter engage the stringers downstream of said front edge of said stop finger to pull the respective bottom stop against said curved front edge of said finger so that the latter tends to move back to its inactive position; locking means mounted on said support means movable between an inactive position and a locking position and cooperating in said locking position with said stop finger to prevent the latter after its end has moved into said gap to move to its inactive position; and control means cooperating with said feeding means, said locking means and said moving means for stopping operation of said feeding means when said end of said stop finger after having moved into a gap engages the bottom stop at the end of the stop while said locking means is in said locking position, for then moving said blade from its rest to its active position and back to its rest position and thereafter moving said locking means to its inactive position and simultaneously restarting said drive means so that said curved edge on said stop finger will cause the latter to move to its inactive position, due to the camming action imparted to said curved dege of said stop finger by the bottom stop pulled thereagainst.
Claim 3
Dependent Claim
62 words
An apparatus as defined in claim 1, and including a support lever tiltably mounted on said support means and carrying at one end thereof said stop finger extending downwardly from said one end, and biasing means connected to the other end of said lever tending to tilt the latter in a direction in which the stop finger is moved into a gap.
Claim 4
Dependent Claim
73 words
An apparatus as defined in claim 2, wherein said lever is a double armed lever pivoted about a pivot axis intermediate its ends and having an upper and a lower edge, said locking means comprising a pin adapted to engage said lower edge of said lever, on the side of the pivot axis which is distant from said one end after said finger connected to said one end has dropped into a gap.
Claim 5
Dependent Claim
92 words
An apparatus as defined in claim 1, wherein said feeding means comprise a first pair of transversely spaced rotatable means and a second pair of transversely spaced rotatable means arranged to engage the stringers of the chain at opposite faces laterally of the engaged coupling elements, one of said pairs of transversely spaced rotatable means being driven, said end of said stop finger being arranged in the inactive position thereof between the other pair of rotatable means and in the stopping position of said finger between said one pair of rotatable means.
Claim 6
Dependent Claim
91 words
An apparatus as defined in claim 4, wherein said first pair of rotatable means comprises a pair of transversely spaced rollers adapted to engage upper faces of the stringers, and wherein said second ppair of rotatable means comprises a pair of transversely spaced rollers and a pair of belts respectively extending in elongated loops partly about said second pair of rollers, and engaging the stringers on the lower faces thereof, and including drive means for driving said belts, and biasing means urging said first pair of rollers towards said second pair.
Claim 7
Dependent Claim
31 words
An apparatus as defined in claim 5, and including manually operable means for moving said first pair of rollers away from said second pair against the force of said biasing means.
Claim 8
Dependent Claim
31 words
Apparatus aS defined in claim 5, wherein the diameter of each of said second pair of rollers is at most 3/4 th of an inch, preferably 5/8 th of an inch.
Claim 9
Dependent Claim
66 words
Apparatus as defined in claim 2, and including means cooperating with said support lever and the stop finger carried thereby to adjust the position of the stop finger in feeding direction of the chain relative to the blade so that the distance between the transverse cut through the chain, produced by the blade, from the bottom stop at the end of each gap may be adjusted.
Claim 10
Dependent Claim
64 words
Apparatus as defined in claim 2, and including a guide lever located beneath said support lever and extending substantially parallel thereto, said guide lever being pivoted at one end and having at the other end a downwardly extending projection adapted to engage the upper faces of said stringers and being formed at said other end with a slot through which said stop finger extends.
Claim 11
Dependent Claim
80 words
Apparatus as defined in claim 1, wherein said support means comprises a base, having an upper face along which the chain is movable, and including elongated weight means removably mounted on said base upstream of said feeding means and having a lower face facing said upper face of said base and being adapted to engage the upper faces of the stringers, said weight means being formed with a guide passage therethrough for guiding the slide fastener chain in longitudinal direction.
Claim 12
Dependent Claim
20 words
Apparatus as defined in claim 1, wherein said moving means for moving said blade comprises pneumatic cylinder and piston means.
Claim 13
Dependent Claim
30 words
Apparatus as defined in claim 1, wherein said moving means for moving said blade comprises motor means and crank means driven by said motor means and connected to said blade.
Claim 14
Dependent Claim
31 words
Apparatus as defined in claim 1, wherein said locking means comprises a pin movable between said inactive and said locking position, and means for moving said pin between said positions thereof.
Claim 15
Dependent Claim
19 words
Apparatus as defined in claim 13, wherein said means for moving said pin comprises pneumatic piston and cylinder means.
Claim 16
Dependent Claim
92 words
Apparatus as defined in claim 13, and including a lever tiltable about an axis substantially normal to that of said pin and carrying said pin at one end thereof, said means for moving said pin between the positions thereof comprises biasing means connected to said lever for biasing the latter in the direction in which said pin is in said locking position and electromagnet means cooperating with the other end of said lever for tilting the latter about said axis to a position in which said pin is in its inactive position.
Claim 17
Dependent Claim
30 words
Apparatus as defined in claim 1, wherein said cutting blade is a pinking blade having in a plane normal to the direction of its movement a zig-zag shaped cutting edge.
Claim 18
Dependent Claim
97 words
Apparatus as defined in claim 2, wherein said slide fastener chain comprises a pair of top stops on the stringers on the other end of each gap and a slider on each of said first portions of the chain, said stop finger riding over each of said sliders during movement of the chain in longitudinal direction and thus senses the presence or absence of a slider on each of said first chain portions, said control means including means for stopping the apparatus when said stop finger senses the absence of a slider on a first chain portion.
References Cited (Backward Citations)
US3190161A
Cited
US3376772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |