发明名称 |
Registration mark detector |
摘要 |
An improved optical scanner has a light source and a focusing element to direct the light to a region of an adjacent moving web. The sensor also includes a second focusing element to focus the reflected light onto a slit having a selected orientation. Electronic elements sense the light passing through the slit and generate an output control signal.
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申请公布号 |
US4484079(A) |
申请公布日期 |
1984.11.20 |
申请号 |
US19810315950 |
申请日期 |
1981.10.28 |
申请人 |
HURLETRONALTAIR, INC. |
发明人 |
BETZ, HOWARD T.;SCHULENBURG, JR., EDWARD J. |
分类号 |
B65H23/04;G06K7/10;(IPC1-7):G01N21/86 |
主分类号 |
B65H23/04 |
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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