| 发明名称 |
Color image forming apparatus |
| 摘要 |
In a color image forming apparatus, a test pattern is formed by a color toner and provided with multiple tones by a dither method. The toner density of the test pattern is accurately read by a simple structure and faithfully corresponds to the actual toner density.
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| 申请公布号 |
US6118557(A) |
申请公布日期 |
2000.09.12 |
| 申请号 |
US19970989661 |
申请日期 |
1997.12.12 |
| 申请人 |
RICOH COMPANY, LTD. |
发明人 |
SUGIYAMA, MITSUGU;SASAKI, EIICHI;SHINOHARA, TADASHI;IRIE, KOUICHI;SHIO, YUTAKA |
| 分类号 |
G03G15/00;G03G15/01;G03G15/04;G03G21/00;G03G21/14;H04N1/40;H04N1/407;H04N1/60;(IPC1-7):G03B27/80;H04N1/46;H04N1/21 |
主分类号 |
G03G15/00 |
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