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Society of Motion Picture Engineers : incorporation and by-laws (1926)

Page scan 000126 from Society of Motion Picture Engineers : incorporation and by-laws

Record Details:

Title:
Society of Motion Picture Engineers : incorporation and by-laws
Date:
1926
Publisher:
New York : Society of Motion Picture Engineers
Volume:
Transactions of the Society of Motion Picture Engineers (1926)
Leaf #:
000126
Language:
English
Subjects:
motion pictures, Cinematography -- Periodicals
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Library of Congress, MBRS, Moving Image Section
Sponsor:
Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division
Coordinator:
Media History Digital Library
Description:
Preceeded by an unnumbered issue published in 1916 called: Incorporation and by-laws
Date Added:
September 12, 2024
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120 Transactions of S.M.P.E., September 1926 Rl and R2 and slowly driven in an opposite direction to that in which the film is traveling. The points of contact with these strips are arranged at offsetting points, so that the tension of the film is sufficient to polish it thoroughly on both sides. The film then passes through two rubber rollers at C, which simply pull the film through the machine. The film is then wound on a reel by an automatic take-up similar to the take-up on the lower magazine of a projection machine. The entire operation requires about 4^^ minutes to the thousand foot reel of film. Fig. 2. Film cleaning machine, showing squeegees and wiping felt. The solution tank holds approximately one quart of the cleaning fluid, which is drained off into a filter after every seventh or eighth reel. After passing through the filter, the fluid can be used as often as it is thoroughly filtered and freed from the dirt that it carries after it has cleaned the seven or eight reels. By actual measurements, this filter from a day's work of one hundred reels of film has caught 14 cubic inches of dirt.