A Projection Reel of Improved Design

It is generally conceded that the present 5/16-in. diameter shaft and 1/8-in. drive key on present film reel handling equipment such as magazines, rewinds, etc., are inadequate to support and drive 2000-ft reels of 35-mm film. Much unnecessary film damage is caused by the reel wobble, backlash, and poor alignment caused by this situation. This paper describes an improved reel design featuring a 1-in. diameter splined hub shaft opening and an automatic ball and groove locking device to provide accurate lateral alignment and eliminate manually operated keys on reel shafts. — To reduce film shipping damage, a design is suggested for an exchange reel shipping case with a center shaft passing through the 1-in. openings in the hubs of the new reels.

Print ISSN

0097-5834

Published

1947-03

Content type

Original Research

DOI

10.5594/J12726