发明名称 |
Film mid roll interrupt protection for a camera using magnetic azimuth recording on film |
摘要 |
Data is recorded on the film by the manufacturer prior to exposure at a first magnetic head azimuth angle. The camera magnetically records information on the film frame-by-frame at a second head azimuth angle with each exposure or shortly thereafter. Before exposure of any frame, the camera determines whether the frame has already been exposed by sensing the recorded signal amplitude at one of the two magnetic head azimuth angles. In order to prevent a double exposure, the camera transports the film past any frame having data magnetically recorded therein corresponding to the second azimuth angle.
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申请公布号 |
US5017326(A) |
申请公布日期 |
1991.05.21 |
申请号 |
US19890417345 |
申请日期 |
1989.10.05 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
WASH, MICHAEL L.;PEARSON, DOUGLAS H.;KELBE, RICHARD R. |
分类号 |
G03B17/24 |
主分类号 |
G03B17/24 |
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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