EP0320246A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Sheet feeder
Assignee: Panasonic Holdings Corp
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Filing: 1988-12-08
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Granted: —
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Expires: 2008-12-08
Abstract
Abstract In a sheet feeding apparatus, a member supporting at one end thereof a rotatable pressure roller (3) is mounted turnably at the other end thereof on an input shaft driven by a motor (6). This member is coupled to the input shaft via a friction generating mechanism (9) which generates a friction force. This friction force allows the rotatable pressure roller to be pressed onto a sheet to be fed at an optimum pressure.
Inventors
- 👤 Hironori Ono
- 👤 Yoshito Urata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 23:49
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/02; B65H3/06; B65H3/0669; B65H2404/00; B65H2404/10; B65H2404/14; B65H2404/142; B65H2404/1421; B65H2404/14211
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
A sheet feeding apparatus comprising: loading means for loading a sheet; pickup means having a roller being positioned above said sheet for feeding in the sheet, said roller being rotatable itslf and turnable for separation from and tight contact with said sheet; driving means for generating engery for rotating and turning said pickup means; connecting means for connecting the roller of said pickup means with said driving means; and torque generating means for transmitting a prescribed driving torque to said connecting means so as to bring said sheet into tight contact with said pickup means at a prescribed pressure.
Claim 2
Dependent Claim
99 words
A sheet feeding apparatus comprising: loading means for loading a sheet; pickup means having a roller being positioned above said sheet for feeding in the sheet, said roller being rotatable itslf and turnable for separation from and tight contact with said sheet; driving means for generating engery for rotating and turning said pickup means; connecting means for connecting the roller of said pickup means with said driving means; and torque generating means for transmitting a prescribed driving torque to said connecting means so as to bring said sheet into tight contact with said pickup means at a prescribed pressure.
Claim 3
Dependent Claim
21 words
A sheet feeding apparatus according to claim 1, wherein the roller of the pick-up means is constructed by an elastic member.
Claim 4
Dependent Claim
25 words
A sheet feeding apparatus according to claim 1, wherein the torque genertaing means gives the prescribed torque to the connecting means by a friction force.
Claim 5
Dependent Claim
122 words
A sheet feeding apparatus according to claim 1, wherein the driving means comprises a rotary shaft provided at a turning axis of the pick-up means, and a motor for driving the rotary shaft to rotate, and wherein the torque generating means comprises first rotary means fixed to the rotary shaft, second rotary means connected to the pick-up means and disposed to oppose to the first rotary means, and a coil spring wound around outer periperies of both the first and the second rotary means, a torque for turning the connecting means about the rotation axis of the rotary shaft being produced by a friction force between said coil spring and the outer periphery of one of said first and second rotary means.
Claim 6
Dependent Claim
65 words
A sheet feeding apparatus according to claim 1, wherein the torque genertaing means comprises a first face plate connected to the driving means, a second face plate disposed at the center of turning of the pick-up means and being opposed to the first face plate, and a viscous fluid disposed between said first face plate and said second face plate for transmitting the prescribed torque.
References Cited (Backward Citations)
No citation records indexed.
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