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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 7251437 B1

PDFFull Text
Date of Patent:
Jul. 31, 2007

Filed:

Mar. 01, 2005

Image formation apparatus having a body to be charged with specified properties and including the use of a protective material

Applicants:

Nozomu Tamoto, Shizuoka, JP;

Tetsuro Suzuki, Shizuoka, JP;

Yasuo Suzuki, Shizuoka, JP;

Takahiko Tokumasu, Tokyo, JP;

Kazuhiko Watanabe, Tokyo, JP;

Hiroshi Nakai, Kanagawa, JP;

Kohichi Ohshima, Shizuoka, JP;

Noboru Tsukude, Kanagawa, JP;

Nekka Matsuura, Kanagawa, JP;

Inventors:

Nozomu Tamoto, Shizuoka, JP;

Tetsuro Suzuki, Shizuoka, JP;

Yasuo Suzuki, Shizuoka, JP;

Takahiko Tokumasu, Tokyo, JP;

Kazuhiko Watanabe, Tokyo, JP;

Hiroshi Nakai, Kanagawa, JP;

Kohichi Ohshima, Shizuoka, JP;

Noboru Tsukude, Kanagawa, JP;

Nekka Matsuura, Kanagawa, JP;

Assignee:

Ricoh Company, Ltd., Tokyo, JP;

Attorney:

Oblon, Spivak, McClelland, Maier & Neustadt, P.C.

Primary Examiner:

William J Royer

Int. Cl.
CPC ...
G03G 15/00 (2006.01); G03G 15/02 (2006.01); G03G 15/18 (2006.01); G03G 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

An image formation apparatus including at least a moving body to be charged, a charging device for charging the body to be charged using discharge caused by applying a voltage to a charging member provided in contact with or proximity to the body to be charged, a latent image formation device for forming a latent image on a surface of the body to be charged which is charged by the charging device, and a development device for depositing toner on an image portion of the latent image formed by the latent image formation device, wherein an elastic displacement ratio τe for the surface of the body to be charged is equal to or greater than 40% which is defined by the following formula,elastic displacement ratio τe (%)=[(maximum displacement)-(plastic displacement)]/(maximum displacement)×100,and the image formation apparatus further includes a protective material feeding device for depositing a protective material on at least a discharge area of the surface of the body to be charged.

Find Patent Forward Citations

Tamoto, Nozomu. (2007). Image formation apparatus having a body to be charged with specified properties and including the use of a protective material (U.S. Patent No. 7251437). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7251437

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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