Xerographic copying on a transparent sheet

Claim 1

In a method of making a xerographically imaged transparency wherein an unimaged transparent copy sheet is imaged in a plain paper-type copier, said copier embodying a photoconductive surface on which a toner image is formed, said copy sheet comprising a transparent base film having a transparent coating thereon adapted for receiving and for having fixed thereto a toner image transferred from said photoconductive surface, said copier also embodying an opacity sensor which controls the operation of the copier and which is activated by copy sheet opacity, the improvement for activating indiscriminately the sensors of different copiers having diverse opacity location requirements and for activating such sensors with the transparent copy sheet in any angular disposition in which it is received by their respective copiers, which comprises employing in said method a transparent copy sheet in order to activate said sensor with an opaque border therein that extends completely around the sheet and encompasses on unimaged transparent area of the sheet.