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:
Dec. 20, 2016
Filed:
Sep. 28, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An image forming apparatus includes a photosensitive member, an exposure unit, a developing unit that develops an electrostatic latent image using toner, a detection unit that detects an amount of the toner contained in the developing unit, and a calculation unit that calculates a difference value between the amount of detected toner detected and a target toner amount. In addition, an accumulation unit accumulates the calculated difference value, and a controller controls toner replenishing based on the calculated difference value and the accumulated value. A determination unit determines, based on an amount of the consumed toner and an amount of the contained toner, whether or not an error of an amount of replenished toner is larger than a threshold value, and determines, based on the number of times that the error is determined, whether or not replacement of the container is required.