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:
Aug. 14, 1990
Filed:
Jun. 07, 1988
Applicant:
Inventors:
Keiji Kusumoto, Osaka, JP;
Masazumi Ito, Osaka, JP;
Yoshiaki Takano, Osaka, JP;
Takashi Noda, Osaka, JP;
Assignee:
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ; G03G / ;
U.S. Cl.
CPC ...
355203 ; 355326 ; 355245 ;
Abstract
An image forming apparatus has plural developing units which perform image forming operations with use of either one of the developing units. The image forming apparatus includes a counting arrangement for counting a respective number of times of use of the plural developing units or with respect to each of the colors of developers contained in the plural developing units. A developing unit is selected having the highest frequency in use among the developing units when the image forming apparatus is brought into the initial mode thereof.