Constant-tension conveyor drive for thermal processing apparatus

Details Constant-tension conveyor drive for thermal processing apparatus Constant-tension conveyor drive for thermal processing apparatus

1977-11-02

1978-12-05

Blunk, Evon C.

Conveyors: power-driven

Conveyor section

Endless conveyor

62380, 198835, 198952, B65G 2344

Patent

active

041281640

ABSTRACT:
A self-compensating constant-tension drive system for a belt conveyor used in a cryogenic freezing tunnel or other elongated thermal processing apparatus, comprising a hydraulic motor driving the drive pulley of the conveyor, a hydraulic pump driven by the tensioning pulley, and a pressure relief valve connected to the outlet of the pump to inhibit flow from the pump and thus inhibit rotation of the pump and tensioning pulley until a predetermined tension is established in the upper run of the belt; the belt is longer than the inter-pulley spacing to allow for substantial thermal expansion and contraction, and the excess belt length is stored in a catenary sag adjacent the drive pulley.

REFERENCES:
patent: 2413339 (1946-12-01), Stadelman
patent: 3757533 (1973-09-01), Kent
patent: 3765525 (1973-10-01), Hartwig

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