Title: Transfer humidity control device

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.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Watanabe, Toshio (Ebina, JP)

Application Number: 832032
Filing Date: 1977-09-09
Publication_date: 1979-01-09
Assignee: Rank Xerox Limited (London, GB2)
Primary Class(es): 361/235 399/311
Other Classes:
US Patent Ref:

3816756

Jun, 1974

Bresnick

361/235.

Other Refs: Other References: Eastman Kodak Research Disclosure, 1/75, pp. 16-17.