Control device for a feed roller

Details Control device for a feed roller Control device for a feed roller

1994-10-28

1996-09-17

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355290, 27125801, G03G 1520

Patent

active

055573703

ABSTRACT:
A feed roller control device includes a feed roller having a first electrode layer with a plurality of connecting portions formed on a surface thereof, a resilient insulation layer having holes therethrough corresponding to the connecting portions and a second electrode layer. In a nip portion where a pressure roller abuts the feed roller, the insulation layer is resiliently compressed so that several ones of the plurality of electrode connecting portions of the first layer are in electrical contact with the second layer. A detecting unit detects the change in the amount of electrical current flowing between the electrode layers due to the increased number of contacts when a plate-shaped or sheet medium is in the nip portion.

REFERENCES:
patent: 3650618 (1972-03-01), Volkers
patent: 5315356 (1994-05-01), Nagato et al.
patent: 5506667 (1996-04-01), Kinoshita

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