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:
Jul. 31, 2007
Filed:
May. 20, 2005
Ken Yoshizuka, Nagano-ken, JP;
Keiichi Taguchi, Nagano-ken, JP;
Ken Yoshizuka, Nagano-ken, JP;
Keiichi Taguchi, Nagano-ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
The image forming apparatus has an image supporting body, a developing device on which developing units storing developers of the same color are detachably mounted, and control unit for controlling a printing operation in response to a print request. Further, in the case where the total number of print pages of a first developing unit, which is in use, exceeds the number of calibration pages if executing a print request, when a second developing unit which does not exceed the number of calibration pages exists, the control unit executes the printing operation using the second developing unit, and when the second developing unit does not exist, the control unit executes the printing operation using the first developing unit if the requested print page number does not exceed a predetermined threshold, or executes a calibration operation if the requested print page number exceeds the predetermined threshold.