发明授权
- 专利标题： Image forming apparatus
- 专利标题（中）： 图像形成装置
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申请号： US352030申请日： 1994-11-30
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公开(公告)号： US5917619A公开(公告)日： 1999-06-29
- 发明人: Hideaki Yamagata , Toshio Miyazawa
- 申请人： Hideaki Yamagata , Toshio Miyazawa
- 申请人地址： JPX Tokyo
- 专利权人： Ricoh Company, Ltd.
- 当前专利权人： Ricoh Company, Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX5-340563 19931208
- 主分类号： H04N1/40
- IPC分类号： H04N1/40 ; G03G21/04 ; H04N1/00 ; H04N1/46
摘要：
The present invention provides a color tone detection sensor for detecting the tone of a color actually printed, a color conversion processing section for executing color conversion to inputted image data, and a system controller for executing color tone detection prior to an operation for detecting a copy-inhibited document in a copy-inhibited document detecting section, causing the copy-inhibited document detecting section to execute the operation for detecting a copy-inhibited document using image data subjected to color conversion in the color conversion processing section when the detected color tone is not a specified one, or causing the copy-inhibited document detecting section to execute the same operation using the inputted image data when the detected color tone is a specified one.
公开/授权文献
- US4015671A Electric hammer 公开/授权日：1977-04-05