Sheet conveyance apparatus and printing apparatus

21 Pages·2014·1.9 MB·English

USOO8752954B2
(12) United States Patent
(10) Patent N0.: US 8,752,954 B2
Sato et a]. (45) Date of Patent: Jun. 17, 2014
(54) SHEET CONVEYANCE APPARATUS AND (56) References Cited
PRINTING APPARATUS
U.S. PATENT DOCUMENTS
(71) Applicant: Canon Kabushiki Kaisha, Tokyo (JP) 5,700,006 A 12/1997 Sekiya et al‘
5,765,826 A 6/1998 lsoda et al.
(72) Inventors: Ryosuke Sato, Kawasaki (JP); Kenji 5,933,697 A * 8/1999 Onodera et a1. ............ .. 399/406
Shigeno Yokohama Up)- Masato Izumi 5,975,516 A * 11/1999 Maruchi et a1. .......... .. 271/10.l2
K JP ’ ’ 6,527,267 B1 3/2003 Kuwata et a1.
awasa 1 ( ) 6,643,480 B2 11/2003 Kuwata et a1.
7,029,006 B2 4/2006 lzumi et a1.
(73) Assignee: Canon Kabushiki Kaisha, Tokyo (JP) 7,032,900 B2 4/2006 Nishikata et a1.
7,694,962 B2 * 4/2010 Morya et a1. ................ .. 271/228
. . . . . 7 708 267 B2 5/2010 Sh'
( * ) Notlce: Subject to any d1scla1mer, the term ofthis 830113656 B2 * 9/2011 Még?go ““““““““““““ n 271/264
patent 1s extended or adjusted under 35 8,079,589 B2 12/2011 Kinoshim et al,
U.S.C. 154(b) by 0 days.
FOREIGN PATENT DOCUMENTS
(21) Appl.No.: 13/645,923
JP 2009-073614 4/2009
(22) Filed: Oct. 5, 2012 * cited by examiner
(65) Prior Publication Data Primary Examiner i T' N' V9 _
(74) AllorneyAgenl, oerrm * Fltzpatnck, Cella, Harper&
US 2013/0100223 A1 Apr. 25, 2013 Scimo
(30) Foreign Application Priority Data (57) ABSTRACT
A sheet conveyance apparatus comprising: a sheet convey
Oct. 21, 2011 (JP) ............................... .. 2011-231284 ance path; a loop forming unit that is disposed on the sheet
conveyance path and bends, in a loop, the sheet to be con
(51) Int_ CL veyed; and a guide unit that is stepwise high at both sides
B4112/01 (200601) whereas low at the center, as viewed in a sheet conveyance
B65H 5/08 (200601) direction, and extends in the sheet conveyance direction,
(52) us CL wherein the sheet sagging in the loop by the loop forming unit
USPC ...................................... .. 347/104- 271/1012 enters a guide region being de?ned between Opposite guide
. . . ’ faces of paired steps in the stepwise guide unit and having a
(58) 51552“ ClaSSIgzzt/llo6 14 532152 6 “88 271/3 12 9 1 width according to the width of the sheet, so that the side
"""" "571/10 12 ’242 ’272 274f 400/6'24 ’63'0’ edges ofthe sheet abut against the guide faces, thus correcting
' ’ ’ ’ ’ 4 Ob / 63 6’ the skewing of the sheet in the sheet conveyance direction.
See application ?le for complete search history. 21 Claims, 12 Drawing Sheets
611a 6 613a 6145, 6111b 6131) ?llb 1
615a 6151)
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