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:
Dec. 07, 2004
Filed:
May. 30, 2003
Hiroyoshi Matsumoto, Ibaraki, JP;
Teruaki Mitsuya, Ibaraki, JP;
Tsuneaki Kawanishi, Ibaraki, JP;
Hisao Okada, Ibaraki, JP;
Natsuki Kuribayashi, Ibaraki, JP;
Masayoshi Ishii, Ibaraki, JP;
Keisuke Kubota, Ibaraki, JP;
Hitachi Printing Solutions, Ltd., Ebina, JP;
Abstract
A transfer member transporting section is disposed so as to bring a tip end of a transfer member into contact with a peripheral face of a transfer rotary member before the tip end of the transfer member enters a nip area. A bias power supply has a polarity inverting function of, during a period from a timing when the tip end of the transfer member is brought into contact with the transfer rotary member by the transfer member transporting section, to that when the tip end of the transfer member enters the nip area, applying a voltage of a polarity which is identical with that of a toner, to the transfer rotary member, and after the tip end of the transfer member enters the nip area, applying a voltage of a polarity which is opposite to that of the toner, to the transfer rotary member.