Oblon, Fisher, Spivak, McClelland & Maier
Apparatus for unrolling and spreading rolled cloth
 An apparatus for unrolling and spreading a long roll of cloth on a work table in which a servo motor is coupled with wheels of a spreader and for running the spreader on the work table. A servo motor is coupled with a dispensing roller and for rolling out the cloth roll rotatably supported on and by the spreader. A servo motor is coupled with a delivery roll for delivering the cloth unrolled by the dispensing roller onto the work table. First sensing means senses a running distance of the spreader. Second and third sensing means sense rotation speeds of the dispensing servo motor and the delivery servo motor, respectively. A control circuit generates a first control output signal to drive and control the running servo motor according to a preset input and the output signal from the first sensing means. An operational comparing circuit generates second and third control signals for synchronizing the dispensing and delivery servo motors in rotation with the running servo motor, a given variable factor of multiplication is coupled with the output signal from the first sensing means, the output signal modified by the multiplication factor is individually compared with the output signals from the second and third sensing means, and the first control output is gain-controlled by each of the results of the comparisons. 
N.C.A. Co., Ltd.
B B
B65H B65H
inventional inventional
Hidetomo
Kikuchi