发明名称 |
Double feed detection method and device |
摘要 |
A double feed detection method for detecting a double feed of a sheet-like detection object transported through a processing unit has an ultrasonic transmitter and an ultrasonic receiver positioned so as to sandwich a transport path along which the sheet-like detection object is transported so as to detect a double feed of the detection object. The double feed detection method has a step of forming a gap between the sheet-like detection objects where the sheet-like detection objects overlap when a double feed of the sheet-like detection objects occurs. Forming the gap between the sheets enhances an attenuation of an intensity of a response signal whenever a double feed occurs. As a result, a distinction between the intensity of the response signal when a double feed has occurred and when no double feed has occurred is sharpened and thus more easily detected, improving the double feed detection accuracy.
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申请公布号 |
US2001042956(A1) |
申请公布日期 |
2001.11.22 |
申请号 |
US20010758147 |
申请日期 |
2001.01.12 |
申请人 |
MINORU WADA;SATOH SHINICHI |
发明人 |
MINORU WADA;SATOH SHINICHI |
分类号 |
G01B17/02;B65H5/06;B65H7/12;(IPC1-7):B65H7/12 |
主分类号 |
G01B17/02 |
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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