发明名称 |
Document detecting apparatus |
摘要 |
A document detecting apparatus for a copying machine, comprising a photo-sensor having a light projecting device which emits a measuring light from an inside of to an outside of a copying machine through an original glass plate, and a light receiving device which is installed at a position deviated from a path symmetric to an optical axis of said measuring light with respect to a normal line set up on a surface of the original glass plate and which is directed to receive a scattered light produced from the measuring light scattered at a surface of an original document placed on the original glass plate; and a microprocessor which judges whether or not the original document exists according to an intensity of a light measured by said photo-sensor.
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申请公布号 |
US4659214(A) |
申请公布日期 |
1987.04.21 |
申请号 |
US19860829777 |
申请日期 |
1986.02.14 |
申请人 |
MITA INDUSTRIAL CO., LTD. |
发明人 |
TAKEMURA, YOSHINOBU;KAWAMOTO, MASUO;HASHIZUME, MASAHIRO;NAGATA, KATSUMI |
分类号 |
G03G15/00;(IPC1-7):G03B27/62 |
主分类号 |
G03G15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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