Flat foil printing press having foil web and sheet guidance

A back-pressure plate for a flat foil printing press with a foil web guidance for several foil webs, with a sheet guidance, a back-pressure plate and a machine control, characterised in that

• the back-pressure plate comprises an evacuation structure,
• the evacuation structure comprising suction regions which run in a sheet running direction and which have suction openings,
• wherein the suction regions are arranged next to and between several embossing regions without suction openings, in which the foil webs run,
• wherein the suction regions are subdivided into several suction segments which are successive in the sheet running direction and
• wherein the suction segments are each connected to a vacuum source via a vacuum switching element by way of a vacuum feed line and are controllable by means of a program in the machine control,
• so that after an embossing, firstly all suction segments covered by a sheet are evacuable, and subsequently, when an embossed sheet runs out, the suction segments which are no longer covered by the sheet are successively disconnectable from the vacuum source.