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:
Mar. 20, 2001
Filed:
Aug. 04, 1998
Chinobu Sakai, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An image forming apparatus including an image forming unit to form a developer image on an image carrier, a conveying member to convey an image receiving member toward the image carrier, a transfer charger to transfer the developer image formed on the image carrier on the image receiving member by giving a transfer charge to the image receiving member conveyed by the conveying member, a guide member provided between the conveying member and the transfer charger to guide the image receiving member conveyed by the conveying member toward the transfer position and a separation charger arranged at the downstream side of the transfer charger along the transfer direction of the image receiving member to separate the image receiving member with the developer image transferred thereon by the transfer charger. A bias voltage having the same polarity as the transfer charge is applied to the guide member. When the developer image is transferred on the image receiving member by the transfer charger, this bias voltage is controlled so that it is set at a first bias voltage before the image receiving member comes near the separation charger and at a second bias voltage that is larger than the first bias voltage when the image receiving member comes near the separation charger.