Transfer humidity control device

Details Transfer humidity control device Transfer humidity control device

1977-09-09

1979-01-09

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Electric charge generating or conducting means

With specific power supply

355 3CH, 355 3TR, 355 14, H01T 1900

Patent

active

041341473

ABSTRACT:
In an electrostatographic copying system wherein an image on an initial image support is transferred to a copy sheet, particularly by a transfer corona generator assisted by an auxiliary transfer corona generator applying pre-transfer charges to the initial image support, opposing conductive rollers measure the conductivity of each copy sheet prior to transfer and through a control circuit vary the voltages applied to both the transfer corona generator and the auxiliary transfer corona generator means accordingly. A relay switching system is disclosed automatically selecting between AC and two levels of DC transfer voltages in response to four different copy sheet humidity conditions to optimize the image transfer.

REFERENCES:
patent: 3816756 (1974-06-01), Bresnick
Eastman Kodak Research Disclosure, 1/75, pp. 16-17.

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