Journal of the Society of Motion Picture Engineers ( Volume: 30, Issue: 2, February 1938)

[ACTIVE]

Reduction of Loop-Length Variations in Non-Slip Printers

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPE
Volume: 30, No. 2, pp. 136–149
Abstract: Compensation for varying degrees of film shrinkage is accomplished in the Bedford non-slip printer by changes in the length of a loop of film between a sprocket and the printing point. This involves uncertainty of synchronism by the amount that the loop, as first threaded, differs in length from the final running loop. For most purposes, the present designs do not cause greater change in loop-length than may readily be tolerated. For certain purposes, especially if this type of printer is to be employed for 16-mm. films, there may be too much departure from synchronism. A guide-roller arrangement is described by which the necessary change of angle of approach of the raw stock to the printing point is attained with comparatively small change of loop length. Several possible arrangements are considered and other features of the non-slip printer are discussed.
Publication Date: 1938-02-01
DOI: 10.5594/J14694
ISSN: Print: 0097-5834
Link: https://doi.org/10.5594/J14694
Author(s): E. W. KelloggRCA Manufacturing Co., Camden, N. J.
Copyright: © 1938 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. Bedford A. V. : U. S. Patent No. 1,754,187. EXTERNAL
2. Bedford A. V. : U. S. Patent No. 2,098,371. EXTERNAL
3. Batsel C. N. : “A Non-Slip Sound Printer,” J. Soc. Mot. Pict. Eng. , XXIII (Aug., 1934 ), No. 2 , p. 100 . EXTERNAL
4. Wood R.V. : “A Shrinkage-Compensating Sound Printer,” J. Soc. Mot. Pict. Eng. , XVIII (June, 1932 ), No. 6 , p. 788 . EXTERNAL
5. Baker J. O. Robinson D. H. : “Modulated High-Frequency Recording as a Means of Determining Conditions for Optimal Processing,” J. Soc. Mot. Pict. Eng. , XXX (Jan., 1938 ), No. 1 , p. 3 . EXTERNAL
6. Kellogg E. W. : “A New Recorder for Variable-Area Recording,” J. Soc. Mot. Pict. Eng. , XV (Nov., 1930 ), No. 5 , p. 653 . (The title of this paper is misleading, in that the main features of the recorder were in no wise related to the type of sound-track to be recorded.). EXTERNAL

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E. W. Kellogg; Reduction of Loop-Length Variations in Non-Slip Printers, Journal of the Society of Motion Picture Engineers ( Volume: 30, Issue: 2, February 1938); SMPTE, 1938. Available at https://doi.org/10.5594/J14694

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E. W. Kellogg; Reduction of Loop-Length Variations in Non-Slip Printers, Journal of the Society of Motion Picture Engineers ( Volume: 30, Issue: 2, February 1938); SMPTE, 1938. Available at https://doi.org/10.5594/J14694

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<span class="citation">E. W. Kellogg; <cite>Reduction of Loop-Length Variations in Non-Slip Printers</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 30, Issue: 2, February 1938); SMPTE, 1938. Available at <a href="https://doi.org/10.5594/J14694" target="_blank" rel="noopener">https://doi.org/10.5594/J14694</a></span>

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E. W. Kellogg; Reduction of Loop-Length Variations in Non-Slip Printers, Journal of the Society of Motion Picture Engineers ( Volume: 30, Issue: 2, February 1938); SMPTE, 1938
doi: 10.5594/J14694
url: https://doi.org/10.5594/J14694

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<li>
E. W. Kellogg; <cite id="bib-10-5594-j14694">Reduction of Loop-Length Variations in Non-Slip Printers</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 30, Issue: 2, February 1938); SMPTE, 1938
<span class="doi">10.5594/J14694</span>
</li>