Selective pre-transfer corona transfer with light treatment for

Details Selective pre-transfer corona transfer with light treatment for Selective pre-transfer corona transfer with light treatment for

1988-12-15

1991-08-06

Braun, Fred L.

Photocopying

Contact printing

Light boxes

355266, G03G 1514, G03G 2100

Patent

active

050381776

ABSTRACT:
Balanced, efficient corona transfer for both the charged area image and the discharged area image of a developed tri-level image is obtained by the provision of a selective pre-transfer charge corona device in combination with a pre-transfer discharge lamp. While improved transfer over prior art devices is obtained using a pre-transfer lamp prior to pre-transfer charging the preferred embodiment of the invention utilizes a pre-transfer lamp before and in coincidence with pre-transfer charging.

REFERENCES:
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patent: 3612681 (1971-10-01), Itoh
patent: 3784300 (1974-01-01), Hudson et al.
patent: 4039257 (1977-08-01), Connolly
patent: 4078929 (1978-03-01), Gundlach
patent: 4205322 (1980-05-01), Truzuki et al.
patent: 4482240 (1984-11-01), Kuge et al.
patent: 4506971 (1985-03-01), Buell et al.
patent: 4761672 (1988-08-01), Parker et al.
patent: 4847655 (1989-07-01), Parker et al.
patent: 4937630 (1990-06-01), Yoshikawa et al.

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