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:
Nov. 27, 2001
Filed:
Oct. 04, 1999
Hiroshi Sahara, Susono, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes a plurality of image bearing members for bearing an image of plural colors, respectively, an intermediate transfer member and a controller for controlling the peripheral speed of the transfer member. For this apparatus, selection is made possible between a first mode of sequentially transferring the image of plural colors onto the intermediate transfer member by use of the plurality of image bearing members for the transfer of the image of plural colors on the intermediate transfer member to a transfer material, and a second mode of transferring a monochromatic image onto the intermediate transfer member by use of a predetermined image bearing member for the transfer of the monochromatic image to a transfer material. When the second mode is selected and the length of the monochromatic image in the moving direction of the intermediate transfer member is shorter than the distance from a first position of transferring the monochromatic image on the predetermined image bearing member onto the intermediate transfer member to a second position of transferring the monochromatic image on the intermediate transfer member to the transfer material in the moving direction of the intermediate transfer member, the controller switches the peripheral speed of the intermediate transfer member from a first speed of transferring the monochromatic image from the image bearing member to the intermediate transfer member to a second speed higher than the first speed during a predetermined time period.