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:
Sep. 30, 2025
Filed:
Jun. 11, 2024
Canon Kabushiki Kaisha, Tokyo, JP;
Naoki Mugita, Ibaraki, JP;
Kota Kurokawa, Chiba, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes a developing bias applying portion that applies a developing bias including a direct current voltage and an alternating current voltage to a developer bearing member that bears toner. When a voltage on the same-polarity side of a charging polarity of the toner with respect to the direct current voltage out of the alternating current voltage is referred to as Vgo, the developing bias applying portion applies the developing bias to the developer bearing member so that as compared to a peak-to-peak voltage in a case where humidity is a first humidity, the peak-to-peak voltage in a case where humidity is a second humidity that is lower than the first humidity is greater, and so that the voltage Vgo in the case where humidity is the second humidity is the same as the voltage Vgo in the case where humidity is the first humidity.