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. 03, 2026
Filed:
Aug. 01, 2024
Canon Kabushiki Kaisha, Tokyo, JP;
Kosuke Takeuchi, Chiba, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A carrier collecting device includes a rotatable sleeve and a magnet non-rotatably disposed inside the sleeve, and collects the carrier on the image bearing member. A first bias is applied to the sleeve during the image forming operation. A second bias is applied to the sleeve in a predetermined mode during non-image forming. When, a duration of a voltage of a reverse polarity to a charging polarity of the toner is t, a duration of a voltage of a same polarity as the charging polarity of the toner is t, and a ratio of twith respect to one period (t+t) of the AC voltage of the bias applied to the sleeve is a duty ratio, a duty ratio of the AC voltage of the second bias is lower than a duty ratio of the AC voltage of the first bias.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile