US3756587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabric pick-up mechanism
Assignee: USM Corp
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Filing: 1971-12-23
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Granted: 1973-09-04
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Expires: 1991-12-23
Abstract
Abstract A versatile mechanism is provided for successively seizing and removing single plies of fabric and the like. A pair of pick-up devices, employing suction holding and friction separating means and without the aid of a hold-down mechanism, cooperate to locally contort and separate a ply from its stack by relative offset pivotal movement whereupon the devices can reliably transfer the single separated work piece.
Inventors
- 👤 C Lutts
- 👤 J Brennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:43
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/08; B65H3/0808; B65H3/0816; B65H3/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A device for picking up successive single top-most plies from a stack comprising a pair of cooperative heads having their respective ply-engaging ends provided with high friction means, means mounting the heads respectively for pivotal movement about horizontal axes and in laterally offset planes between initial spaced apart ply engaging positions and closer positions whereby a localized portion of the engaged ply is contorted and lifted, said friction means being disposed transversely of said offset planes, and means for moving the heads to transfer the locally contorted ply to a delivery point where the ply may be released.
Claim 2
Independent Claim
98 words
A device for picking up successive single top-most plies from a stack comprising a pair of cooperative heads having their respective ply-engaging ends provided with high friction means, means mounting the heads respectively for pivotal movement about horizontal axes and in laterally offset planes between initial spaced apart ply engaging positions and closer positions whereby a localized portion of the engaged ply is contorted and lifted, said friction means being disposed transversely of said offset planes, and means for moving the heads to transfer the locally contorted ply to a delivery point where the ply may be released.
Claim 3
Independent Claim
100 words
A device for picking up successive single top-most plies from a vertical stack comprising a pair of tubular, cooperative suction heads having their respeCtive ply-engaging ends provided with high friction means, means mounting the heads respectively for pivotal movement about horizontal axes and in laterally offset planes between initial spaced apart ply engaging positions and closer positions whereby a localized portion of the engaged ply is contorted and lifted, said friction means being disposed transversely of said planes, and means for moving the heads to transfer the locally contorted ply to a delivery point where the ply may be released.
Claim 4
Independent Claim
100 words
A device for picking up successive single top-most plies from a vertical stack comprising a pair of tubular, cooperative suction heads having their respeCtive ply-engaging ends provided with high friction means, means mounting the heads respectively for pivotal movement about horizontal axes and in laterally offset planes between initial spaced apart ply engaging positions and closer positions whereby a localized portion of the engaged ply is contorted and lifted, said friction means being disposed transversely of said planes, and means for moving the heads to transfer the locally contorted ply to a delivery point where the ply may be released.
Claim 5
Dependent Claim
51 words
A device as set forth in claim 1 wherein the high friction means includes pointed work engaging elements yieldable heightwise, the pointed elements of one head being angularly biased toward those of the other head relatively to slide portions of the top ply on the under ply without disturbing the latter.
Claim 6
Dependent Claim
46 words
A device as set forth in claim 1 wherein each of the heads is provided with a ply stripping member, and mechanism for yieldably operating said members simultaneously at the delivery point to overcome the combined work holding effect of the suction and said friction means.
Claim 7
Dependent Claim
38 words
A device as set forth in claim 1 wherein mechanism is provided for pivoting said heads in counter rotating directions at a pick-up zone and oppositely counter rotating the heads to release the work at said delivery point.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |