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. 15, 2004
Filed:
Sep. 18, 2002
Shinichi Kamoshida, Nagano-Ken, JP;
Kenjiro Yoshioka, Nagano-Ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
In an image forming apparatus of the present invention, the voltage of a chargeable layer of an image carrier at the portion to be in contact with writing electrodes is adjusted by a surface potential adjusting member which is disposed to be in contact with the chargeable layer between the writing electrodes and a transfer roller . That is, even if the reverse charge injection occurs because the transfer voltage is applied to the transfer roller and the transfer roller is in contact with the chargeable layer of the image carrier at an interval between a printed paper and the next paper , the potential of the chargeable layer at the portion to be in contact with the writing electrodes is adjusted not to exceed the withstand voltage of IC drivers of the writing electrodes by the surface potential adjusting member . Therefore, this prevents the writing head from being broken, prevents the production of ghost image, and further inhibits voltage drop due to discharge between the image carrier and the writing electrodes during the process of writing a latent image, thereby preventing the electrostatic latent image from being in disorder.