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Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filedfiledCritical
Publication of JPS5040120ApublicationCriticalpatent/JPS5040120A/ja
Publication of JPS532725B2publicationCriticalpatent/JPS532725B2/ja
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
G03B21/00—Projectors or projection-type viewers; Accessories therefor
G03B21/14—Details
G03B21/32—Details specially adapted for motion-picture projection
G03B21/321—Holders for films, e.g. reels, cassettes, spindles
G03B21/323—Cassettes
G03B21/325—Endless cassettes
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Replacement Of Web Rolls
(AREA)
Registering, Tensioning, Guiding Webs, And Rollers Therefor
(AREA)