Patent US3593988A successfully refreshed from Google Patents.
US3593988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet-feeding arrangements
Assignee: Omal Group Ltd
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Filing: 1968-08-27
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Granted: 1971-07-20
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Expires: 1988-08-27
Abstract
Abstract The invention relates to apparatus and a method for feeding copy sheets from a magazine to the charging means of an electrostatic copier. The magazine contains a stack of sheets and the apparatus comprises feed means for feeding each succeeding top sheet downwardly from the stack at an acute angle to a leading face of the stack across an edge of the stack so that the top sheet bows upwardly away from the next sheet in the stack to minimize the risk of adhesion between the top sheet and the next sheet as the top sheet leaves the magazine.
Inventors
- 👤 Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:40
CPC Classifications
B; B65; B65H; B65H1/00; B65H1/26; B65H1/266; B65H1/04; G; G03; G03G; G03G15/00; G03G15/65; G03G15/6502
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
110 words
Apparatus for feeding sheets from a stack thereof comprising: a support means for supporting a stack of sheets to expose at least a portion of the top sheet adjacent the leading edge thereof; and feed means for engaging the exposed surface of the top sheet of the stack adjacent its leading edge and for feeding each successive top sheet downwardly from the stack at an acute angle relative to a leading face of the stack, across the edge of said leading face, the edge being defined by the next sheet in the stack, to bow the top sheet of the stack upwardly away from the next sheet in the stack.
Claim 2
Dependent Claim
110 words
Apparatus for feeding sheets from a stack thereof comprising: a support means for supporting a stack of sheets to expose at least a portion of the top sheet adjacent the leading edge thereof; and feed means for engaging the exposed surface of the top sheet of the stack adjacent its leading edge and for feeding each successive top sheet downwardly from the stack at an acute angle relative to a leading face of the stack, across the edge of said leading face, the edge being defined by the next sheet in the stack, to bow the top sheet of the stack upwardly away from the next sheet in the stack.
Claim 3
Dependent Claim
31 words
Apparatus according to claim 1, wherein the support means is arranged so that the stack is yieldably urged into frictional contact with the feed means in the operation of the apparatus.
Claim 4
Dependent Claim
29 words
Apparatus according to claim 2, wherein the feed means comprises a feed roller of generally D-shaped cross section, and means for rotating the feed roller through a complete revolution.
Claim 5
Dependent Claim
20 words
Apparatus according to claim 3, wherein the feed means comprises a plurality of said D-shaped rollers, said rollers being coaxial.
Claim 6
Dependent Claim
53 words
Apparatus according to claim 2, wherein the support means comprises a platform supporting the stack, and fulcrum means for pivoting the platform on an axis extending transversely to the direction of feed so that in the operation of the apparatus the weight of the stack yieldably urges the stack into said frictional contact.
Claim 7
Dependent Claim
15 words
Apparatus according to claim 5, comprising a magazine containing the stack and providing the platform.
Claim 8
Dependent Claim
11 words
Apparatus according to claim 6, wherein the magazine is of cardboard.
Claim 9
Dependent Claim
25 words
Apparatus according to claim 1, comprising guide means for guiding the top sheet in a concave curved path as it is fed from the stack.
Claim 10
Dependent Claim
13 words
Apparatus according to claim 1 wherein said feed means includes a guiding element.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |