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:
Jun. 07, 2005
Filed:
Mar. 19, 2004
Satoshi Mochizuki, Shizuoka, JP;
Naohito Shimota, Shizuoka, JP;
Hiroaki Matsuda, Shizuoka, JP;
Shinichiro Yagi, Shizuoka, JP;
Tomomi Tamura, Shizuoka, JP;
Tatsuya Niimi, Shizuoka, JP;
Satoshi Mochizuki, Shizuoka, JP;
Naohito Shimota, Shizuoka, JP;
Hiroaki Matsuda, Shizuoka, JP;
Shinichiro Yagi, Shizuoka, JP;
Tomomi Tamura, Shizuoka, JP;
Tatsuya Niimi, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image formation apparatus develops an electrostatic latent image with a two-component developer consisting of magnetic carriers and toners by using a development apparatus and a latent image supporter including a filler in an outermost layer thereof, the development apparatus having a developer supporter, which has an internally fixed magnetic body and rotates while supporting a developer on a surface thereof, and a developer quantity controller controlling a quantity of the developer which is supported by the developer supporter facing the magnetic body and controlling a height of magnetic brushes and consisting of materials having rigidity or rigidity and magnetic properties, wherein a ratio (Gp/Gd) of a development gap to a doctor gap between the developer supporter and the controller is from 0.7 to 1.0, and a weight-averaged particle diameter of a developer carrier is from 20 to 60 μm.