SENSOR CONTROLLING IN COMPUTER FANFOLD REPRODUCTION

摘要

An automatic duplicating system in which computer fanfold documents are fed by an automatic handling apparatus having a tractor and drive means for advancing the document across the platen of the processor for the system. An arrangement is provided which will shut down the system in the event there is a break in the fanfold material during a reproduction run or the end of the document has been attained during normal operation. Sensing devices are utilized in the path of movement of the document and a circuit is provided to produce a train of pulses in accordance with the movement of the document. The frequency of the train of pulses is compared with a reference frequency to insure proper operation.