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.:
Date of Patent:
Jul. 31, 2007
Filed:
Mar. 01, 2005
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;
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;
Ricoh Company, Ltd., Tokyo, JP;
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.