Patent EP0129910A1 successfully refreshed from Google Patents.
Patent EP0386737A2 successfully refreshed from Google Patents.
EP0386737A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Sheet feeding apparatus
Assignee: Canon Inc
•
Filing: 1990-03-07
•
Granted: —
•
Expires: 2010-03-07
Abstract
Abstract The present invention provides a sheet feeding apparatus comprising a supply means (26) contacting one of the sheets (P1) in a sheet stack (P), for applying a feeding force to the sheet (P1); a first limiting means (56) abutting against a front end of the sheet stack (P) in a sheet feeding direction, for limiting the movement of the sheet stack (P) in the sheet feeding direction; a second limiting means (55) contacting the sheet (P1) to which the feeding force is applied from the supply means (26), for limiting the movement of the sheet stack (P) in a sheet thickness direction; and a clearance (β) defined between the first and second limiting means, the clearance (β) having a predetermined length in the sheet feeding direction.
Inventors
- 👤 Shoichi Kan
- 👤 Tomoyuki Araki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 06:12
CPC Classifications
B; B41; B41J; B41J13/00; B65; B65H; B65H3/00; B65H3/46; B65H3/56; B65H1/00; B65H1/08; B65H1/12; B65H3/52; B65H3/5207; B65H3/5215; B65H3/5223
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
109 words
A sheet feeding apparatus comprising: a supply means contacting one of the sheet in a sheet stack, for applying a feeding force to said sheet; a first limiting means abutting against a front end of the sheet stack in a sheet feeding direction, for limiting the movement of the sheet stack in the sheet feeding direction; a second limiting means contacting said sheet to which the feeding force is applied from said supply means, for limiting the movement of the sheet stack in a sheet thickness direction; and a clearance defined between said first and second limiting means, said clearance having a predetermined length in the sheet feeding direction.
Claim 2
Dependent Claim
109 words
A sheet feeding apparatus comprising: a supply means contacting one of the sheet in a sheet stack, for applying a feeding force to said sheet; a first limiting means abutting against a front end of the sheet stack in a sheet feeding direction, for limiting the movement of the sheet stack in the sheet feeding direction; a second limiting means contacting said sheet to which the feeding force is applied from said supply means, for limiting the movement of the sheet stack in a sheet thickness direction; and a clearance defined between said first and second limiting means, said clearance having a predetermined length in the sheet feeding direction.
Claim 3
Dependent Claim
30 words
A sheet feeding apparatus according to claim 1, wherein said clearance has a predetermined length in the sheet thickness direction, said length being smaller than a thickness of one sheet.
Claim 4
Dependent Claim
21 words
A sheet feeding apparatus according to claim 1, wherein said second limiting means contacts an uppermost sheet in the sheet stack.
Claim 5
Dependent Claim
23 words
A sheet feeding apparatus according to claim 1, wherein said first limiting means has an inclined portion inclined toward the sheet feeding direction.
Claim 6
Dependent Claim
28 words
A sheet feeding apparatus according to claim 1, wherein said second limiting means contacts said sheet at a position rearwardly of the front end of the sheet stack.
Claim 7
Dependent Claim
35 words
A sheet feeding apparatus according to claim 2, wherein a distance between an end of said first limiting means and an end of said second limiting means is larger than the thickness of one sheet.
Claim 8
Dependent Claim
21 words
A sheet feeding apparatus according to claim 2, wherein said second limiting means contacts an uppermost sheet in the sheet stack.
Claim 9
Dependent Claim
24 words
A sheet feeding apparatus according to claim 7, wherein said first limiting means has an inclined portion inclined upwardly toward the sheet feeding direction.
Claim 10
Dependent Claim
30 words
A sheet feeding apparatus according to claim 1, wherein an end of said first limiting means is positioned at the same level as an end of said second limiting means.
Claim 11
Dependent Claim
21 words
A sheet feeding apparatus according to claim 9, wherein said second limiting means contacts an uppermost sheet in the sheet stack.
Claim 12
Dependent Claim
24 words
A sheet feeding apparatus according to claim 10, wherein said first limiting means has an inclined portion inclined upwardly toward the sheet feeding direction.
Claim 13
Dependent Claim
32 words
A sheet feeding apparatus according to claim 1, further including an arm member having one end to which said first and second limiting means are attached and the other end rotatably supported.
Claim 14
Dependent Claim
23 words
A sheet feeding apparatus according to claim 4, wherein a friction surface having high coefficient of friction is formed on said inclined portion.
Claim 15
Dependent Claim
16 words
A sheet feeding apparatus according to claim 13, wherein said friction surface is formed by rubber.
Claim 16
Dependent Claim
24 words
A sheet feeding apparatus according to claim 12, further including an accommodating means for supporting said arm member and for accommodating the sheet stack.
Claim 17
Dependent Claim
24 words
A sheet feeding apparatus according to claim 15, wherein said accommodating means is shiftable with respect to said supply means in a predetermined direction.
Claim 18
Dependent Claim
36 words
A sheet feeding apparatus according to claim 1, further including a friction member contacting a front end of a sheet, for separating the sheet, arranged downstreamly of said first limiting means in the sheet feeding direciton.
Claim 19
Dependent Claim
28 words
A sheet feeding apparatus according to claim 17, wherein said friction member is arranged in a position where said friction member line-contacts the front end of said sheet.
Claim 20
Dependent Claim
25 words
A sheet feeding apparatus according to claim 17, further including an urging means for uring the front end of said sheet against said friction member.
Claim 21
Dependent Claim
18 words
A sheet feeding apparatus according to claim 17, wherein said friction member can be changed in its position.
Claim 22
Dependent Claim
23 words
A sheet feeding apparatus according to claim 20, wherein said friction member can be changed in its position along the sheet feeding direction.
Claim 23
Dependent Claim
19 words
A sheet feeding apparatus according to claim 17, wherein said friction member can be changed in its inclination angle.
Claim 24
Dependent Claim
131 words
An image forming system comprising: a supply means contacting one of the sheet in a sheet stack, for applying a feeding force to said sheet; a first limiting means abutting against a front end of the sheet stack in a sheet feeding direction, for limiting the movement of the sheet stack in the sheet feeding direction; a second limiting means contacting said sheet to which the feeding force is applied from said supply means, for limiting the movement of the sheet stack in a sheet thickness direction; a clearance defined between said first and second limiting means and having predetermined lengths in the sheet feeding direction as well as in a sheet thickness direction; and an image forming means for forming an image on the sheet fed by said supply means.
Claim 25
Dependent Claim
131 words
An image forming system comprising: a supply means contacting one of the sheet in a sheet stack, for applying a feeding force to said sheet; a first limiting means abutting against a front end of the sheet stack in a sheet feeding direction, for limiting the movement of the sheet stack in the sheet feeding direction; a second limiting means contacting said sheet to which the feeding force is applied from said supply means, for limiting the movement of the sheet stack in a sheet thickness direction; a clearance defined between said first and second limiting means and having predetermined lengths in the sheet feeding direction as well as in a sheet thickness direction; and an image forming means for forming an image on the sheet fed by said supply means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.