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. 04, 1990
Filed:
Nov. 18, 1988
Tomio Tada, Osaka, JP;
Junichi Takamatsu, Osaka, JP;
Mita Industrial Co., Ltd., Osaka, JP;
Abstract
The toner density control device of the invention is adapted to an image forming apparatus in which a plurality of processes for image formation are executed, and includes a toner sensor for detecting toner density in a developing section of the image forming apparatus, toner supplying means for supplying toner to the developing section according to output of the toner sensor, and cancelling means for temporarily cancelling function of the toner supplying means or output of the toner sensor in response to switching of operations in the process for image formation. Even if a meachanical vibration is generated during switching of operations in the process for image formation, the function of the toner supplying means or the output of the toner sensor is temporarily cancelled, so that an erroneous detection of toner density or inappropiate toner density control based on the aforesaid errorneous detection can be avoided. Accordingly, it is possible to prevent such a drawback that the density of a formed image becomes too dark or too weak in places due to mechanical vibration in the process of the image formation.