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:
Oct. 25, 2022
Filed:
Jan. 21, 2022
Canon Kabushiki Kaisha, Tokyo, JP;
Kosuke Takeuchi, Chiba, JP;
Atsushi Matsumoto, Ibaraki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes an image carrier, an exposure device to expose the image carrier to form an electrostatic latent image on the image carrier, a conductive member, and a developing device having a rotatable developing roller and a rotatable toner supply roller. Polarity of direct-current components of biases applied during an image forming operation to the conductive member, the developing roller, and the toner supply roller are the same as a polarity of normally charged toner. An absolute value of the bias applied to the developing roller during the image forming operation is smaller than an absolute value of the bias applied to the toner supply roller during the image forming operation. The absolute value of the bias applied to the toner supply roller during the image forming operation is smaller than an absolute value of the bias applied to the conductive member during the image forming operation.