发明申请
- 专利标题： PRINT APPARATUS AND METHOD OF CONTROLLING THE SAME, AND STORAGE MEDIUM AND CARTRIDGE
- 专利标题（中）： 打印设备及其控制方法以及存储介质和存储器
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申请号： US13344856申请日： 2012-01-06
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公开(公告)号： US20120195604A1公开(公告)日： 2012-08-02
- 发明人: Nobuyoshi Kakigi
- 申请人： Nobuyoshi Kakigi
- 申请人地址： JP Tokyo
- 专利权人： CANON KABUSHIKI KAISHA
- 当前专利权人： CANON KABUSHIKI KAISHA
- 当前专利权人地址： JP Tokyo
- 优先权： JP2011-017116 20110128
- 主分类号： G03G15/00
- IPC分类号： G03G15/00
摘要：
A print apparatus having a photosensitive drum used for color printing. In the apparatus, the number of sheets on which color printing has been performed and the number of sheets on which monochrome printing has been performed are obtained. It is determined whether or not the lifetime of the photosensitive drum used for color printing has expired based on a threshold value determined based on the ratio between the number of sheets on which color printing has been performed and the number of sheets on which monochrome printing has been performed and the sum of the number of sheets on which the color printing has been performed and the number of sheets on which the monochrome printing has been performed.
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