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:
May. 03, 1994
Filed:
May. 22, 1992
Satoshi Deishi, Amagasaki, JP;
Hiroshi Mizuno, Ikoma, JP;
Toshimitsu Fujiwara, Kobe, JP;
Toshiya Natsuhara, Nishinomiya, JP;
Masami Matsuura, Isehara, JP;
Hideo Yamaki, Isehara, JP;
Hideaki Hirahara, Ayase, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
A developing device comprising: a drive roller which is driven so as to be rotated; a developing sleeve which is formed by a thin film and has a peripheral length slightly larger than that of the drive roller so as to be fitted around the drive roller; a press member which presses the developing sleeve against the drive roller at one side of the drive roller so as to form a sag portion of the developing sleeve such that the sag portion is brought into contact with an electrostatic latent image support member; and an electric field forming member for forming alternating electric field such that an attractive force capable of bringing the developing sleeve and the electrostatic latent image support member into contact with each other is applied between the developing sleeve and the electrostatic latent image support member.