Transport system for photo-typesetting machine

Advancing material of indeterminate length – With material-responsive control means – To regulate longitudinal movement of material

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226 38, 226 49, 226195, 242 672, 242 674, 242 755, B65H 2318, B65H 1718

Patent

active

043514600

ABSTRACT:
A flexible sheet transport system comprising a primary mechanism for feeding the flexible sheet at a predetermined velocity in either a forward or a reverse direction, a tension roller assembly disposed in the path of the flexible sheet so as to be frictionally engaged thereby, an auxiliary drive mechanism for applying tension to the flexible sheet, a coupling assembly connected between the tension roller assembly and the auxiliary drive mechanism and driven thereby in a given sense tending to rotate the tension roller in a direction to move the flexible sheet in the reverse direction. Included in the coupling assembly is a slip coupling that slips in response to application of a given torque and a unidirectional coupling that prevents movement of the coupling assembly in a sense opposite to the given sense.

REFERENCES:
patent: 1881056 (1932-10-01), McBain
patent: 2658693 (1953-11-01), Wolf
patent: 3233843 (1966-02-01), Dockstader
patent: 3246857 (1966-04-01), Morse
patent: 3411684 (1968-11-01), Tison et al.
patent: 3441233 (1969-04-01), Defontenay
patent: 3809336 (1974-05-01), Kollar et al.
patent: 3904145 (1975-09-01), Steinberger et al.

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