Journal of the Society of Motion Picture Engineers ( Volume: 35, Issue: 10, October 1940)

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Improvements in Motion Picture Laboratory Apparatus

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: A machine for cleaning motion picture film by dry wiping has been equipped with a reservoir and distributing system so as to fit it for application of a cleaning liquid. In order to prevent dust from being carried into the roll when film is rewound, the wind up is enclosed in a box into which filtered air is pumped at a sufficient rate to maintain a forceful discharge stream at the point where the film enters. This stream dislodges dust particles. In order to have sufficient light on a meter in a darkroom the face of the meter is covered with a metal hood containing a suitable safelight. The meter is observed through a small aperture which permits very little light to escape into the room. Self-luminous finder buttons used as markers in a darkroom can be protected from dirt and corrosion by mounting them in an inverted glass ignition tube which is sealed at the open end with a thermoplastic. A developing machine roller is provided with frictional driving engagement with the shaft on which it is mounted by the use of spring-held shoes which bear against the shaft. Oscillation in a mechanical filter in the drive train of a continuous printer has been subdued by the use of Koroseal strips in place of springs and friction damping.
Publication Date: 1940-10-01
DOI: 10.5594/J10040
Link: https://doi.org/10.5594/J10040
Author(s): C. E. Ives, E. W. Jensen

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C. E. Ives and E. W. Jensen; Improvements in Motion Picture Laboratory Apparatus, Journal of the Society of Motion Picture Engineers ( Volume: 35, Issue: 10, October 1940); SMPTE, 1940. Available at https://doi.org/10.5594/J10040

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C. E. Ives and E. W. Jensen; Improvements in Motion Picture Laboratory Apparatus, Journal of the Society of Motion Picture Engineers ( Volume: 35, Issue: 10, October 1940); SMPTE, 1940. Available at https://doi.org/10.5594/J10040

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<span class="citation">C. E. Ives and E. W. Jensen; <cite>Improvements in Motion Picture Laboratory Apparatus</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 35, Issue: 10, October 1940); SMPTE, 1940. Available at <a href="https://doi.org/10.5594/J10040" target="_blank" rel="noopener">https://doi.org/10.5594/J10040</a></span>

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<li>
C. E. Ives and E. W. Jensen; <cite id="bib-10-5594-j10040">Improvements in Motion Picture Laboratory Apparatus</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 35, Issue: 10, October 1940); SMPTE, 1940
<span class="doi">10.5594/J10040</span>
</li>