API Registry JSON CSV exports Resources
Theme

Choose how MSRBot.io looks on this device.

Auto (match system) Light mode Dark mode

Preference is stored in this browser only.

Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941)
[ACTIVE]

A Non-Cinching Film Rewind Machine

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
Cinching, or the sliding between layers of film within a reel, produces scratches and surface abrasions which increase the film, noise level. Cinching is more likely to occur in rewinding than anywhere else in the normal usage of sound-film. At the beginning of rewinding, when the supply reel is full and the take-up reel is empty, a small amount of torque is needed for rotating the take-up reel. Under this condition the film will be wound rather loosely. When the supply reel is nearly empty, relatively high film tension is required to produce a given torque on the supply reel. The torque to be applied to the take-up reel will then be high, on account of both the high film tension and the large radius arm of the film spiral on the reel. This high torque is almost certain to cause cinching in the loosely wound bottom portion of the reel. The conditions to be satisfied if cinching is to be avoided are analyzed. A power-driven rewind is described which meets these requirements. The film tension is controlled by the weight of the film on the supply reel at all times during the rewind.
Publication Date
1941-10-01
DOI
10.5594/J09962
Link
https://doi.org/10.5594/J09962
Author(s)
L. A. Elmer
Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J09962.json

Reference this Doc

Plain text (ISO 690 compliant)

Preview:
L. A. Elmer; A Non-Cinching Film Rewind Machine, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941. Available at https://doi.org/10.5594/J09962
Snippet:
L. A. Elmer; A Non-Cinching Film Rewind Machine, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941. Available at https://doi.org/10.5594/J09962

HTML (ISO 690 compliant)

Preview:
L. A. Elmer; A Non-Cinching Film Rewind Machine, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941. Available at https://doi.org/10.5594/J09962
Snippet:
<span class="citation">L. A. Elmer; <cite>A Non-Cinching Film Rewind Machine</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941. Available at <a href="https://doi.org/10.5594/J09962" target="_blank" rel="noopener">https://doi.org/10.5594/J09962</a></span>

SMPTE Icon SMPTE's HTML Pub

Preview:
L. A. Elmer; A Non-Cinching Film Rewind Machine, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941
doi: 10.5594/J09962
url: https://doi.org/10.5594/J09962
Snippet:
<li>
L. A. Elmer; <cite id="bib-10-5594-j09962">A Non-Cinching Film Rewind Machine</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941
<span class="doi">10.5594/J09962</span>
</li>