Endless-roll film cartridge

Details Endless-roll film cartridge Endless-roll film cartridge

1975-01-09

1976-08-03

McCarthy, Edward J.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

B65H 1748

Patent

active

039724859

ABSTRACT:
In an endless-roll film cartridge the problem of cyclical variation in film stepping distance (tick-tocking) is overcome by isolating the inertia of the coil of film from the segment of the film loop engaged by the drive claw, and by storing energy in the film segment returning to the coil each time the film is advanced by the claw and then releasing the energy to move the coil preparatory to the next advancement of the film by the claw. Variable blends provide compliance in the film path at opposite ends of the segment engaged by the claw, one of the bends being controlled by a pocket in a guide defining the path of the film segment returning to the coil.

REFERENCES:
patent: 3244471 (1966-04-01), Mead
patent: 3648941 (1972-03-01), Merry
patent: 3700188 (1972-10-01), Bradford

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