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:
Jun. 30, 2020
Filed:
May. 29, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Takehiro Kojima, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An image forming apparatus executes a first obtain mode to obtain a resistance value of a developing roller when a potential difference between the developing roller and an electroconductive roller is generated by a second voltage generator when the developing roller carries a reference liquid developer having a known toner concentration. A second obtain mode is executed to obtain a toner concentration of the liquid developer on a surface of the developing roller based on the obtained resistance value and a detection result when a potential difference between the developing roller and the electroconductive roller is generated by the second voltage generator when the liquid developer is applied to the developing roller. During image formation, the controller controls a first voltage generator based on the obtained toner concentration so the toner concentration of the liquid developer on the surface of the developing roller is a target value.