Increased transference of a toner image on to a copy sheet by using a zero tension loop applied after corotron transfer
 The present invention comprises a printing machine of the type having a toner image interposed between a flexible member and a sheet. Specifically, the printer has a device for transferring the toner image from the flexible member to the sheet, an apparatus separating the sheet from the flexible member, and a device, located intermediate the transferring means and the separating means, for providing a relative motion between the sheet and flexible member so as to reduce electrostatic forces between the toner and flexible member for improving transfer efficiency. Specifically, the device for providing relative motion incorporates a device for creating a substantially non-tensioned condition in the flexible member and sheet. More particularly, the invention has apparatus for forming a non-tensioned buckle in the portion of the flexible member located intermediate the transferring means and the separating means so as to form the non-tensioned condition in the buckle portion of the flexible member and a tensioned condition in the remainder of the flexible member. More specifically, the non-tensioned buckle comprises a gripping device to hold the flexible member on the outside edges so as to maintain the non-tensioned buckle thus improving transfer efficiency. 
Xerox Corporation
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Frank J. John S.
Bonsignore Berkes