Winding – tensioning – or guiding – Unwinding and rewinding a machine convertible information... – Carrier speed or tension control
Patent
1997-10-14
1999-09-07
Darling, John P.
Winding, tensioning, or guiding
Unwinding and rewinding a machine convertible information...
Carrier speed or tension control
2423282, B65H 5938, G03B 132
Patent
active
059474017
ABSTRACT:
A motion picture film platter assembly having a base, an upright oriented post and at least three vertically spaced support arms. A hub-shaped case is supported on the top surface of each of these support arms. A cylindrical platter having a central bore hole is journaled on an external annular flange of the hub-shaped case and the upper cylindrical wall of the hub-shaped case passes through the bore hole of the circular platter. Each platter has its own drive motor for rotating it. A modular film feed-out unit is removably positioned in the bore hole of one of the circular platters. The film feed-out unit has a top plate and mounted at predetermined positions thereon are a pair of 35 mm or 70 mm film idler rollers and an upright oriented film proximity sensor that is laterally spaced from an upright oriented first keeper roller. A reel of film mounted on the top surface of the circular platter has its front end threaded between the film proximity sensor and the first keeper roller and then around the first and second 35 mm film idler rollers after which the film strip travels to the movie projector. The motors are electrically connected to their respective film proximity sensors so that as the surface of the film strip approaches the film proximity sensor, the motor increases the rotation of its circular platter and when the surface of the film strip travels away from the film proximity sensor the motor rotates the circular platter slower.
REFERENCES:
patent: 3780959 (1973-12-01), Burth
patent: 3823890 (1974-07-01), Potts
patent: 4169566 (1979-10-01), Boudouris et al.
patent: 4671467 (1987-06-01), Burth
patent: 5189451 (1993-02-01), Bredin
Darling John P.
Logan II Charles C.
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