US3747919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable work pick-up device
Assignee: USM Corp
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Filing: 1972-06-06
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Granted: 1973-07-24
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Expires: 1992-06-06
Abstract
Abstract A device for picking up and transferring single plies of sheet material, especially a wide variety of fabric and the like which may be in a stack, comprising a presser foot, a relatively movable work-pinching member cooperative with the presser foot, and means for adjusting the nip of the member and the foot. Threaded means adjustably limits the extent of initial separation of the pinching member and the foot whereby appropriate nipping of different thicknesses and types of material is obtained.
Inventors
- 👤 J Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:24
CPC Classifications
A; A41; A41H; A41H43/00; A41H43/02; B; B65; B65H; B65H3/00; B65H3/22; B65H7/00; B65H7/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
148 words
A pick-up device for transferring single plies of flexible fabric or the like from a stack, comprising a presser foot, a mounting means yieldingly holding the presser foot for relative movement toward and from a surface of the stack, a work engaging pincer pawl movably supported by the presser foot for cooperation therewith, the pawl having operative connection with the presser foot and having convexly disposed work-engageable teeth, spring means biasing the pawl teeth laterally away from the presser foot to allow a localized portion of an external ply of the stack to enter therebetween, and a pinch adjusting nut threaded on said mounting means and engageable with the pawl to limit lateral spacing of the pawl teeth from the presser foot, said nut being arranged during relative movement of the stack surface and the pawl to cam the pawl toward work pinching relation on the presser foot.
Claim 2
Dependent Claim
148 words
A pick-up device for transferring single plies of flexible fabric or the like from a stack, comprising a presser foot, a mounting means yieldingly holding the presser foot for relative movement toward and from a surface of the stack, a work engaging pincer pawl movably supported by the presser foot for cooperation therewith, the pawl having operative connection with the presser foot and having convexly disposed work-engageable teeth, spring means biasing the pawl teeth laterally away from the presser foot to allow a localized portion of an external ply of the stack to enter therebetween, and a pinch adjusting nut threaded on said mounting means and engageable with the pawl to limit lateral spacing of the pawl teeth from the presser foot, said nut being arranged during relative movement of the stack surface and the pawl to cam the pawl toward work pinching relation on the presser foot.
Claim 3
Dependent Claim
44 words
A device as in cLaim 1 wherein the nut has circumferentially spaced formations respectively mateable with a complemental recess in the mounting means, and a locking pin detachably receivable in the respective formations and said recess to adjustably determine the nip of the pawl.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |