Abstract: A photocopying machine with a guide gap (20) formed between a plane rigid and light-transmitting plate (11) and a flexible cellular plate (7, 8). The flexible cellular plate is formed by an extremely low-friction flexible film (8) supported by a layer of flexible foam synthetic resin (7). The rigid plate (11) is covered by an extremely low-friction film (15). A pair of driving rollers (17,18) located on the introduction side and, if appropriate, a pair of driving rollers (24, 25) located on the outlet side serve exclusively as a feed element. The guide gap (20) directly adjoins the roller gap (19) of the pair of driving rollers (17, 18) located on the introduction side, because the parts forming the guide gap and in the form of a plurality of tongues (23) engaging into grooves (22) of the driving rollers (17, 18) are guided through the pair of driving rollers up to the introduction side (5, 13). A developing unit designed on the same construction principle can follow.