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. 25, 2001
Filed:
Nov. 26, 1999
Satoshi Tomiki, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention relates to an image forming apparatus which includes an image bearing member for bearing a toner image, transfer device for electrostatically transferring the toner image on the image bearing member to a transfer material, separating and charge eliminating device for charge-eliminating the transfer material to separate the transfer material from the image bearing member, wherein the transfer device includes a transfer member forming a nip with the image bearing member and constant current control device for controlling a current to be applied on the transfer member to a predetermined value, and wherein the constant current control device effects control at a first current value from before a leading end of the transfer material reaches the nip, and switches to a second current value larger than the first current value in the vicinity of a trailing end of the transfer material in transferring operation.