发明名称 |
Handheld viewer for transparency film |
摘要 |
A compact, handheld viewer adapted for use with photographic transparencies which are located within a film cassette in roll form, in a strip containing a plurality of individual scenes, or individually mounted transparencies. The viewer includes a manually operable drive system for selectively driving either a film take-up reel, for withdrawing film from a film cassette and advancing it through a projection station, or a film spool for rewinding the film into the film cassette.
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申请公布号 |
US4491434(A) |
申请公布日期 |
1985.01.01 |
申请号 |
US19830544547 |
申请日期 |
1983.10.24 |
申请人 |
POLAROID CORPORATION |
发明人 |
BARR, CHARLES A.;VAN ALLEN, DAVID E.;ZANARDELLI, JOHN K. |
分类号 |
G02B27/02;(IPC1-7):G02B27/02 |
主分类号 |
G02B27/02 |
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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