Patent US3595562A successfully refreshed from Google Patents.
US3595562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for picking up pieces of sheet material from a stack of pieces
Assignee: Individual
•
Filing: 1969-05-13
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Granted: 1971-07-27
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Expires: 1989-05-13
Abstract
Abstract A device for picking up pieces of sheet material from a stack of such pieces which includes a tubular means for piercing a top piece of the sheet material of the stack and for introducing a gaseous medium between that top piece and the next lower piece, and cooperant gripping means for gripping the top piece and lifting same from the stack.
Inventors
- 👤 David Oldroyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:58
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/46; B65H3/48; B65H3/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
A device for picking up pieces of sheet material from a stack of such pieces and comprising: tubular means for piercing a top piece of the sheet material of the stack and introducing a gaseous medium between the top piece and the next lower piece, and gripping means for gripping the top piece and lifting the top piece from the stack.
Claim 2
Independent Claim
61 words
A device for picking up pieces of sheet material from a stack of such pieces and comprising: tubular means for piercing a top piece of the sheet material of the stack and introducing a gaseous medium between the top piece and the next lower piece, and gripping means for gripping the top piece and lifting the top piece from the stack.
Claim 3
Dependent Claim
66 words
A device according to claim 1 wherein the gripping means comprise two series of teeth arranged for cooperation with one another and movable relative to one another along the direction of the series whereby, when the teeth are placed on a piece of material and the series of teeth are moved relative to one another, the piece is gripped by the teeth for a lifting motion.
Claim 4
Dependent Claim
16 words
A device according to claim 2 wherein the teeth are inclined along the direction of movement.
Claim 5
Dependent Claim
26 words
A device according to claim 2 wherein said teeth of one of said series are inclined oppositely to said teeth of the other of said series.
Claim 6
Dependent Claim
50 words
A device according to claim 1 wherein the gripping means comprises a vacuum chamber having an open end which when placed with the open end resting on the top piece may be evacuated to exert a suction effect on the top piece and thereby grip it for the lifting purpose.
Claim 7
Independent Claim
61 words
A device for picking up pieces of sheet material from a stack thereof and comprising: piercing means for piercing a topmost piece of the stack and introducing therethrough a gas into the region between the topmost piece and the next lower piece of the stack, and gripping means for gripping the top piece and lifting the top piece from the stack.
Claim 8
Independent Claim
61 words
A device for picking up pieces of sheet material from a stack thereof and comprising: piercing means for piercing a topmost piece of the stack and introducing therethrough a gas into the region between the topmost piece and the next lower piece of the stack, and gripping means for gripping the top piece and lifting the top piece from the stack.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |