Abstract: The invention relates to a method of feeding sheets of printing material in a printing machine, preferably a digital printing machine, on a continuous loop transport means, in particular, a transport belt, which has at least one dead space section, specifically a seam, and which is preferably included in a transport path which permits the alternate selection between simplex printing and duplex printing, in which case it has been taken into account that a region, preferably the leading edge of a respective sheet on the transport means, is detected for the control of a printing process by means of a detecting device. The present invention is to solve the problem of making optimal use of space for sheets on the transport means, while avoiding detecting device errors caused by the dead space section. This problem has been solved by the present invention in that, when a sheet is fed, said sheet's region to be detected is prevented from entering into the dead space section of the transport means.

Abstract: More even utilization of a printing machine, whereby a closed turnover loop that is used has the capacity to handle only a certain number of sheets. For one loading, the turnover loop is loaded as a sequence with a group Gs of a number x of sheets to be imprinted with first form printing to be loaded alternately with a group Gw of a number y of sheets to be imprinted with back side printing, and that in the loading of the turnover loop that directly follows, the sheets to be imprinted are loaded in a sequence that is conjugated with the preceding loading.