Recorder with electrically conductive paper

Details Recorder with electrically conductive paper Recorder with electrically conductive paper

1977-12-08

1979-12-04

Miller, Jr., George H.

Recorders

Writers

Receiver and marker movable

346136, G01D 942, G01D 1524

Patent

active

041774698

ABSTRACT:
A recorder using a carbon backed "self-developing" dry silver recording medium which is guided over a recording and developing path includes a pair of rollers one of which is connected to a ground potential and the other to a positive potential with the electrically conducting carbon coated side of the recording medium arranged to contact both of the rollers to enable electrical current to pass through the carbon backing to generate the heat required to develop the recording thereon. A third roller is arranged to contact the recording medium on the recording side and to press the carbon coated side against a second location on the ground roller to provide a second current conducting path between the positive potential roller and the ground roller. The electrical current is controlled in accordance with the speed of the recording medium to insure a proper developing time relationship at different recording medium speeds.

REFERENCES:
patent: 3346867 (1967-10-01), Schwarzer
patent: 3740758 (1973-06-01), Fabianic et al.
patent: 3754280 (1973-08-01), Lowe
patent: 3887787 (1975-06-01), Gregg
patent: 4038668 (1977-07-01), Quarton

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