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. 04, 2012
Filed:
Jul. 23, 2010
Hironori Akashi, Okazaki, JP;
Soh Hirota, Toyokawa, JP;
Mitsuru Obara, Toyohashi, JP;
Takashi Harashima, Sagamihara, JP;
Kanako Kibihara, Toyokawa, JP;
Hironori Akashi, Okazaki, JP;
Soh Hirota, Toyokawa, JP;
Mitsuru Obara, Toyohashi, JP;
Takashi Harashima, Sagamihara, JP;
Kanako Kibihara, Toyokawa, JP;
Konica Minolta Business Technologies, Inc., Chiyoda-Ku, Tokyo, JP;
Abstract
A color image forming apparatus having photosensitive members; developing devices for developing electrostatic latent images formed on the photosensitive members into toner images with developers comprising toner and carriers; toner concentration sensors for detecting toner concentrations of the developers in the respective developing devices; a toner image bearing member for bearing the toner images temporarily; a toner adherence amount sensor for detecting toner adherence amounts of the toner images held on the image bearing member; and a controller for calculating, with respect to the developing devices, individual optimal developing bias voltage ranges within which a target toner adherence amount can be achieved while the toner concentrations of the developers are within a predetermined toner concentration range from a lower limit to an upper limit, so as to specify a common optimal developing bias voltage range that are commonly suitable for all the developing devices to achieve the target toner adherence amount while the toner concentrations of the developers in the developing devices are within the predetermined toner concentration range, and for calculating target toner concentrations of the developers in the respective developing devices to achieve the target toner adherence amount while a voltage within the common optimal developing bias voltage range is applied between each of the photosensitive members and each of the developing devices.