Patent US4429865A successfully refreshed from Google Patents.
US4429865A
Expired / Lapsed
US
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Paper feed device
Assignee: Minolta Co Ltd
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Filing: 1981-08-26
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Granted: 1984-02-07
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Expires: 2001-08-26
Abstract
Abstract A paper feed device for a copying machine has plate member for supporting a stack of sheets thereon, and separating pawls turnably supported for movement toward and away from the top sheet of the stack and for lightly pressing on each of the forward end corners of the stack when moved toward the stack to the limit of turning movement. The mounting structure for the separating pawls causes them to be displaced in a direction laterally away from the edge of the stack during the turning of the pawls away from the stack to a lifted position.
Inventors
- 👤 Osamu Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:43
CPC Classifications
B; B65; B65H; B65H1/00; B65H1/08; B65H1/14; B65H3/00; B65H3/46; B65H3/54; B65H3/56
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
97 words
A paper feed device comprising: a plate member for supporting a stack of sheets thereon; separating pawls turnably supported for movement toward and away from the top sheet of the stack and for lightly pressing on each of the forward end corners of the stack when moved toward the stack to the limit of turning movement; and means acting on the separating pawls as the pawls are turned away from the stack to a lifted position and displacing said separating pawls in a direction laterally away from the edge of the stack in response to the turning.
Claim 2
Dependent Claim
97 words
A paper feed device comprising: a plate member for supporting a stack of sheets thereon; separating pawls turnably supported for movement toward and away from the top sheet of the stack and for lightly pressing on each of the forward end corners of the stack when moved toward the stack to the limit of turning movement; and means acting on the separating pawls as the pawls are turned away from the stack to a lifted position and displacing said separating pawls in a direction laterally away from the edge of the stack in response to the turning.
Claim 3
Dependent Claim
51 words
A paper feed device as claimed in claim 1, wherein said means for displacing the separating pawls comprises a slanting member for each pawl slanting away from the edge of the stack, in the direction of displacement, and a bearing member on each said slanting member turnably supporting a separating pawl.
Claim 4
Dependent Claim
70 words
A paper feed device as claimed in claim 1, wherein said means for displacing the separating pawls has loose bearing means turnably supporting the separating pawls, means for biasing the separating pawls in a direction opposite to the displacing direction, and a displacing member having a slanting portion for engagement by the separating pawls for displacing the separating pawls against the biasing force when the separating pawls are turned upward.
Claim 5
Dependent Claim
96 words
A paper feed device comprising: a cassette member removably loadable into a main body of a machine; a plate disposed inside the cassette member for supporting sheets thereon and movable upwardly and downwardly; side plates for laterally confining the supported sheets to a specified position; separating pawls turnably supported on each of the side plates; and means acting on the separating pawls as the pawls are turned away from the stack to a lifted position and displacing said separating pawls in a direction laterally away from the edge of the stack in response to the turning.
Claim 6
Dependent Claim
96 words
A paper feed device comprising: a cassette member removably loadable into a main body of a machine; a plate disposed inside the cassette member for supporting sheets thereon and movable upwardly and downwardly; side plates for laterally confining the supported sheets to a specified position; separating pawls turnably supported on each of the side plates; and means acting on the separating pawls as the pawls are turned away from the stack to a lifted position and displacing said separating pawls in a direction laterally away from the edge of the stack in response to the turning.
Claim 7
Dependent Claim
46 words
A paper feed device as claimed in claim 4, wherein said means for displacing the separating pawls comprises a slanting member positioned on each side plate and inclined toward the direction of displacement, and a bearing member on each slanting member turnably supporting the separating pawls.
Claim 8
Dependent Claim
35 words
A paper feed device as claimed in claim 5 in which each said bearing member has an axis of rotation around which the pawl mounted thereon is turnable which is perpendicular to said slanting member.
Claim 9
Dependent Claim
77 words
A paper feed device as claimed in claim 4, wherein said means for displacing the separating pawls has loose bearing means turnably supporting the separating pawls, means for biasing the separating pawls in a direction opposite to the direction of displacement, and a displacing member associated with each pawl and having a slanting portion for being engaged by the corresponding pawl for displacing the separating pawl against the biasing force when the separating pawl is turned upward.
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) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |