Abstract: An apparatus for engaging and disengaging an imaging member from a photoconductor includes a shield enclosing the photoconductor. A detent on the shield to maintains a space between the imaging member and the photoconductor. Removing the shield allows the imaging member to move into contact with the photoconductor when the photoconductor and shield are inserted into an electrophotographic apparatus.

Abstract: An electrostatographic machine having a transfer station including a toner image carrier and a transfer member for electrostatic transfer of toner from the toner image carrier to a toner-image area on a receiver sheet in a nip formed between the toner image carrier and the transfer member. Receiver sheet has a leading edge included in a leading edge margin area and a trailing edge included in a trailing edge margin area. A programmable power supply supplies and controls transfer station current. Before the leading edge enters the nip and after the trailing edge leaves the nip, but not while the toner-image area is in the nip, transfer station current is successively switchably altered by the programmable power supply between at least two predetermined magnitudes. The transfer station current is preferably zero, of a low magnitude, in at least a portion of the leading edge margin area so as to effectively suppress wrap.