发明名称 |
Process for making multicolored photographic slides and apparatus therefor |
摘要 |
Multicolored photographic slides, such as used for business or technical presentations, are produced by color photographing through a black and white negative back-lighted with a first color and then photographing a corresponding black and white positive back-lighted with a second color on the same colored slide film. Additional colors may be obtained by photographing through stacked negatives and positives in which portions of the negative have been selectively opaqued. The precision film registration required for the process is obtained by a novel platen assembly having spring-biased sprockets that engage the film perforations to firmly and accurately position the film.
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申请公布号 |
US4183663(A) |
申请公布日期 |
1980.01.15 |
申请号 |
US19780939269 |
申请日期 |
1978.09.05 |
申请人 |
GREENLY, ROBERT B;PAZ, GEORGE A;TIGNANELLI, GERALD |
发明人 |
GREENLY, ROBERT B;PAZ, GEORGE A;TIGNANELLI, GERALD |
分类号 |
G03B27/58;G03C7/00;(IPC1-7):G03B27/32;G03B27/04;G03B27/42 |
主分类号 |
G03B27/58 |
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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