Transfer humidity control device

Details Transfer humidity control device Transfer humidity control device

H - Electricity

01

T

101/41

H01T 19/00 (2006.01) G03G 15/00 (2006.01) G03G 15/16 (2006.01)

Patent

CA 1110915

ABSTRACT OF THE DISCLOSURE 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. - 1 -

290020

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