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.

Abstract: A reproduction system in which an image is formed on an imaging surface and transferred at a transfer station to a copy sheet, where the copy sheet is transferred through the transfer station by transport means having a plurality of apertures therein through which a vacuum is applied and includes a means to continuously vary those apertures of the transport means within which the vacuum is applied throughout the transfer zone in order to substantially eliminate adverse effects of vacuum hole printout on the pneumatically constrained copy sheet.