Patent ID: 6293453
Filing Date: 2001-09-25
Classification: B41F,B65H

Abstract:
A drag roller control apparatus for controlling a drag roller, disposed downstream of a heat roller, to adjust the rate of transfer of a printing web, in a printing system, said apparatus comprising:a temperature monitoring unit for indirectly measuring a temperature of the drag roller in terms of a temperature of the web pulled by the drag roller;a controlling unit, operatively connected with said temperature monitoring unit, for issuing a control signal for controlling a rotational speed of the drag roller so as to adjust a circumferential speed of the drag roller, said circumferential speed corresponding to said temperature checked by said temperature monitoring unit, to a preset speed corresponding to a reference temperature of the drag roller; anda rotational speed changing unit, operatively connected with said controlling unit, for changing said rotational speed of the drag roller in accordance with said control signal issued from said controlling unit.