Differential driven rewinder-unwinder

Details Differential driven rewinder-unwinder Differential driven rewinder-unwinder

1973-05-04

1976-08-31

Gilreath, Stanley N.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 7551, B65H 2320

Patent

active

039776212

ABSTRACT:
The rotational speed of the roll supporting shaft of a differential driven rewinder-unwinder is controlled whereby to substantially eliminate the generation of heat by utilizing a variable speed variable torque, regenerative motor-type drive in conjunction with a regenerative, multi-quadrant D.C. control. Current is generated and returned to the power lines during a part of each rewinding or unwinding cycle, thereby conserving energy.

REFERENCES:
patent: 1265329 (1918-05-01), Henderson
patent: 2392226 (1946-01-01), Butterworth et al.
patent: 2648502 (1953-08-01), Trofimov
patent: 2753128 (1956-07-01), Thomas et al.
patent: 2916227 (1959-12-01), Bowen
patent: 3219291 (1965-11-01), Huffman
patent: 3224830 (1965-12-01), Mitchell
patent: 3441233 (1969-04-01), Defontenay
patent: 3555774 (1971-01-01), Craig

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