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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9221647 B1

PDFFull Text
Date of Patent:
Dec. 29, 2015

Filed:

Nov. 27, 2013

Sheet folding apparatus, image forming apparatus, and image forming system

Applicants:

Tomohiro Furuhashi, Kanagawa, JP;

Shuuya Nagasako, Kanagawa, JP;

Michitaka Suzuki, Kanagawa, JP;

Kazuya Yamamoto, Kanagawa, JP;

Kyosuke Nakada, Kanagawa, JP;

Akira Kunieda, Tokyo, JP;

Takahiro Watanabe, Kanagawa, JP;

Yuji Suzuki, Kanagawa, JP;

Kiichiro Goto, Kanagawa, JP;

Inventors:

Tomohiro Furuhashi, Kanagawa, JP;

Shuuya Nagasako, Kanagawa, JP;

Michitaka Suzuki, Kanagawa, JP;

Kazuya Yamamoto, Kanagawa, JP;

Kyosuke Nakada, Kanagawa, JP;

Akira Kunieda, Tokyo, JP;

Takahiro Watanabe, Kanagawa, JP;

Yuji Suzuki, Kanagawa, JP;

Kiichiro Goto, Kanagawa, JP;

Assignee:

RICOH COMPANY, LIMITED, Tokyo, JP;

Attorney:

Harness, Dickey & Pierce, P.L.C.

Primary Examiner:

Leslie A Nicholson, III

Int. Cl.
CPC ...
B65H 45/20 (2006.01); B65H 45/04 (2006.01); B31F 1/10 (2006.01); B65H 45/14 (2006.01); B31F 1/00 (2006.01);
U.S. Cl.
CPC ...
B65H 45/04 (2013.01); B31F 1/10 (2013.01); B65H 45/14 (2013.01); B65H 45/147 (2013.01); B65H 45/20 (2013.01); B31F 1/0025 (2013.01); B65H 2801/03 (2013.01); B65H 2801/27 (2013.01);
Abstract

A sheet folding apparatus includes: a folded part forming unit that forms a folded part on the sheet by nipping a curved portion formed on a part of the sheet between an upstream first sheet conveying unit and a downstream second sheet conveying unit by holding a part of the sheet by the first sheet conveying unit and applying conveying force to the sheet to reverse the sheet upstream by the second sheet conveying unit; and a sheet leading end detection unit disposed downstream of or at almost same position as the second sheet conveying unit. The sheet is conveyed based on a detection timing of the sheet leading end detection unit such that the leading end of the sheet protrudes by a predetermined protrusion amount from the second sheet conveying unit immediately before applying conveying force to the sheet to reverse the sheet.

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