Separable xerographic copying set

摘要

The material according to the invention is used to produce xerographic copies by transferring a toner image from a photo-conductive layer. In order to achieve sufficient toner adhesion, the toner is fused, by means of heating with rollers or by heat irradiation, into the surface of the material serving as the copy or the transparent original. Hitherto, transparent copies have only been produced from polyester films, where the biaxial stretching of the production process was cancelled by a heat treatment so as to prevent shrinking of the film during baking of the toner. Other films were unusable because of their thermoplasticity. Furthermore, the films had to be made antistatic so as not to attract dust. The copying set according to the invention comprises an image sheet, which serves as a copy, and an auxiliary sheet which removes the heat absorbed by the image sheet and at the same time is electrically conductive in such a way that electrostatic charges are conducted away from the image sheet. The image sheet and the auxiliary sheet pass through the copier together. They are joined together so as to be easily separable, and are separated after the toner transfer. Owing to the use of an auxiliary sheet, thermoplastic films, which used to stick in the copiers, or thin polyester films, which used to buckle, can be used. Because of the antistatic properties of the auxiliary sheet, electrical charges are conducted away from the copying sheet. In the pack, the auxiliary sheet, which is electrically conductive on both sides, covers the front and rear sides of the copying sheet. As a result, electrostatic charges on pulling out a copying sheet are prevented.