Patent US4034976A successfully refreshed from Google Patents.
US4034976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet feeding apparatus
Assignee: Talaris Sweden AB
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Filing: 1976-04-02
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Granted: 1977-07-12
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Expires: 1996-04-02
Abstract
Abstract Apparatus for removing sheets from a stack of sheets and feeding the sheets one at a time to an output flow-path, said apparatus comprising a feeding nip formed by a frictional drive adapted to engage and propel a sheet in a forward direction in combination with a pressure member adapted to press a sheet against the drive means, a stripper adapted to restrain plural sheets from being fed along the flow-path and a traction nip comprising a roller disposed downstream of the feeding nip, the roller being biased to obstruct said flow-path but being movable by the passage of a sheet and adapted, upon such movement, to open the feeding nip.
Inventors
- 👤 Leif Lundblad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:03
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/02; B65H3/04; B65H3/042; B65H5/00; B65H5/02; B65H5/021; B65H5/025; B65H2701/00; B65H2701/10; B65H2701/19; B65H2701/1912
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
144 words
Apparatus for removing sheets from a stack of sheets and feeding the sheets one at a time to an output flow-path, said apparatus comprising: a. a frictional drive means for engaging and propelling a sheet in a forward direction, b. a resiliently mounted pressure member biased towards said drive means for pressing a sheet against said drive means, c. a stripper means for restraining plural sheets from passing along the flow-path, d. a sheet-engaging member disposed downstream of said pressure member, means biasing said sheet-engaging member to obstruct the flow-path while permitting movement of said sheet-engaging member away from the flow-path upon the passage of a sheet, and e. connection means connecting together the movements of said pressure member and sheet-engaging member for moving the pressure member away from said drive means upon movement of said sheet-engaging member by the passage of a sheet.
Claim 2
Dependent Claim
144 words
Apparatus for removing sheets from a stack of sheets and feeding the sheets one at a time to an output flow-path, said apparatus comprising: a. a frictional drive means for engaging and propelling a sheet in a forward direction, b. a resiliently mounted pressure member biased towards said drive means for pressing a sheet against said drive means, c. a stripper means for restraining plural sheets from passing along the flow-path, d. a sheet-engaging member disposed downstream of said pressure member, means biasing said sheet-engaging member to obstruct the flow-path while permitting movement of said sheet-engaging member away from the flow-path upon the passage of a sheet, and e. connection means connecting together the movements of said pressure member and sheet-engaging member for moving the pressure member away from said drive means upon movement of said sheet-engaging member by the passage of a sheet.
Claim 3
Dependent Claim
25 words
Apparatus as claimed in claim 1 in which the sheet-engaging member comprises a freely running roller positioned adjacent to the drive means for cooperation therewith.
Claim 4
Dependent Claim
38 words
Apparatus as claimed in claim 2 in which the roller is so positioned relative to said drive means and has a profile wherein the periphery of said roller overlaps the extremity of the drive means without contact therebetween.
Claim 5
Dependent Claim
27 words
Apparatus as claimed in claim 1 in which the connection means comprises a spring-biased pivotal lever assembly having means mounting thereon the pressure member and sheet-engaging member.
Claim 6
Dependent Claim
71 words
Apparatus as claimed in claim 1 including sheet-position sensing means connected to the pressure member and disposed downstream of said sheet-engaging member, means biasing said sensing means to obstruct said flow-path while permitting movement of said sensing means away from the flow-path by the passage of a sheet and upon such movement, to delay the return movement of the pressure member until the sheet has moved downstream of said sensing means.
Claim 7
Dependent Claim
29 words
Apparatus as claimed in claim 1 in which the pressure member comprises a smooth non-rotary component capable of relative sliding movement with respect to the surface of a sheet.
Claim 8
Dependent Claim
43 words
Apparatus as claimed in claim 6 in which the frictional drive means comprises a friction roller and the pressure member comprises a forked member having a sheet-engaging extremity overlapping the periphery of said friction roller without contact therewith when no sheet is present.
Claim 9
Dependent Claim
30 words
Apparatus as claimed in claim 7 in which the friction roller has a circumferential groove and the forked member has a portion within said groove when no sheet is present.
Claim 10
Dependent Claim
16 words
Apparatus as claimed in claim 1 in which the pressure member comprises a freely running roller.
Claim 11
Dependent Claim
15 words
Apparatus as claimed in claim 1 in which the drive means comprises a friction belt.
Claim 12
Dependent Claim
33 words
Apparatus as claimed in claim 1 in which the stripper means comprises friction roller means, and means driving said friction roller means in an effective peripheral direction opposite to that of the flow-path.
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) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |