Lead edge transfer switching

Details Lead edge transfer switching Lead edge transfer switching

1978-10-02

1980-02-26

Braun, Fred L.

Photocopying

Including fiber optics

250325, 355 3CH, 361235, 430126, G03G 1516, H01T 1904

Patent

active

041903480

ABSTRACT:
In an electrostatographic copying apparatus in which the imaging material is transferred to the copy member by electrical transfer members which leave electrostatic charges on the copy member resisting stripping of the copy member from the original image support surface, and in which a detacking corona generator is provided to partially neutralize those charges before the stripping of the lead edge of the copy member. There is provided an automatic switching system to apply a non-uniform increased transfer charge to the lead edge area of each copy member in comparison to the body of the copy prior to the detacking to improve the effective image transfer to the lead edge area of the copy after stripping. This is preferably provided by a transient over-shoot in the ouptut voltage of a constant current power supply for the transfer members for the lead edge.

REFERENCES:
patent: 3970381 (1976-07-01), Meagher et al.
patent: 4027960 (1977-06-01), Ladrigan
patent: 4076407 (1978-02-01), Place
patent: 4077709 (1978-03-01), Borostyan et al.

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