Sensor controlling in computer fanfold reproduction

Details Sensor controlling in computer fanfold reproduction Sensor controlling in computer fanfold reproduction

1983-07-11

1985-05-14

Braun, Fred L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 14SH, 355 75, G03G 1500

Patent

active

RE0318884

ABSTRACT:
An automatic duplicating system in which computer fanfold documents are fed by an automatic handling apparatus having a tractor and drive control system 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.

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patent: 3804514 (1974-04-01), Jasinski
patent: 3829082 (1974-08-01), Hoyer
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patent: 4054380 (1977-10-01), Donohue et al.
patent: 4087172 (1978-05-01), Van Dongen
Gustafson, Gary B., "Apparatus for Registering and Feeding Documents", Research Disclosure, Sep. 1978, pp. 40-43.

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