Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1987-11-23
1990-02-20
Jillions, John M.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
352178, B65H 2026
Patent
active
049019333
ABSTRACT:
A transport and storage apparatus and method especially adapted for use in an endless loop film projection system. A turntable rotating at a constant speed synchronized with a film projector has mounted thereon a platter having a cam track including a plurality of arcuate sections alternating with an equal plurality of straight sections, the latter constituting chords relative to the axis of rotation. Means are provided for measuring the linear speed of the cam track and for applying incoming film to the platter at speeds cyclically varying from maximum speed during each arcuate section of the cam track to lower speeds during each chord section of the cam track, the applied film being metered in timed relation with the linear speed of the track. Radially extending low friction skid strips may be provided on the upper surface of the turntable to assist the portions of film layers applied during the chord sections of the cam track to move radially inwardly on the platter to form inwardly directed rounded cusps. Template means may be provided for use during initial stages of loading or make-up of a filmed program on the platter, and anchor blocks of rubbery high friction material may be provided on the platter surface to resist the breaking down of the ends of each of the arcuate portions of film on the platter until enough film layers are applied to give the coil stability.
REFERENCES:
patent: 1469483 (1923-10-01), Parkinson
patent: 2398639 (1946-04-01), Heyer
patent: 4010910 (1977-03-01), Boudouris et al.
patent: 4186891 (1980-02-01), Johnson
patent: 4208018 (1980-06-01), Wilkinson
patent: 4504025 (1985-03-01), Potts
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