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. 21, 1998
Filed:
Feb. 12, 1997
Nobuo Hyakutake, Ebina, JP;
Yoshihiro Enomoto, Ebina, JP;
Junichi Hama, Ebina, JP;
Tetsuya Fujita, Ebina, JP;
Nobuyoshi Komatsu, Ebina, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
In an image forming apparatus wherein plural developing devices 3 have alternating electric field applying mechanisms 4, the alternating electric field applying mechanisms 4 have alternating electric field changing mechanisms 7 for reducing the degree of the action of the alternating electric field on at least one of the developing devices 3 which are later in development order, to a level which is lower than that in the preceding step. As required, at least one of the transferring devices 5 which are later in transfer order has a transfer force changing mechanism 8 for increasing the force of transfer to a transfer medium 6 applied to a color-component toner image on an image carrier 1, to a level which is higher than that in the preceding step. Furthermore, an operation condition judging mechanism 9 may judge whether preset transfer failure conditions are satisfied or not, or environmental conditions may be considered by an environmental condition adjusting device 10.