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. 27, 2018
Filed:
Oct. 12, 2016
Canon Kabushiki Kaisha, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An image forming apparatus includes a rotatable photosensitive drum including a photosensitive layer; a drum charging member contacted or disposed closely to the drum, to be supplied with a DC voltage; a developing device; a transfer member for transferring a toner image onto a toner image receiving member; a device for applying to the transfer member a transfer bias voltage; a light projecting portion for projecting light to the drum before the charging and after the image transfer; a controller for controlling a quantity of the projected light, on the basis of the transfer bias and a film thickness of the photosensitive layer, wherein under a condition that the transfer bias is the same, the light amount controlled by the controller is smaller when the film thickness is a fourth value than when it is a third value, the fourth value being smaller than the third value.