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:
Sep. 11, 2001
Filed:
Mar. 23, 1999
Akira Kumon, Katano, JP;
Masahiro Aizawa, Takatsuki, JP;
Yoshitaka Kitaoka, Kadoma, JP;
Katsutoshi Ogawa, Hirakata, JP;
Hiroyuki Matsuo, Neyagawa, JP;
Akira Fukano, Ikoma, JP;
Akira Ryouji, Osaka, JP;
Other;
Abstract
An image forming apparatus and an image forming method are characterized in that charged particle jumping can be controlled by applying signals having a small potential difference, and that low-voltage type switching devices can be used as switching devices for the power source. Control electrodes,are provided to move charged particles detached from a development roller,and to control the movement amount of the charged particles by generating a transfer electric field directly or indirectly between the development roller,and a rear electrode,. A bias electrostatic field is generated between the development roller,and the control electrodes,by applying a voltage under a jumping start voltage, which is a voltage having the polarity opposite to the polarity of the charged particles and is lower than the jumping start voltage for detaching the charged particles from the development roller