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:
Jun. 28, 2000
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes an image bearing member for bearing a toner image; a transfer device for transferring the toner image onto a transfer material from the image bearing member; a charger for electrically charging the image bearing member, the charger being contactable to residual toner remaining on the image bearing member after transfer of the toner image by the transfer device; a voltage applicator for applying DC and AC voltages to the charger; an image forming device for forming an electrostatic image on the image bearing member charged by the charger; a developing device for developing the electrostatic image by toner; an integrator for integrating degree of usage of the apparatus; and a controller for controlling the AC voltage applied to the charger in accordance with the integrated degree of usage provided by the integrator.