an inserter system has controllable , optional delivery of sheet filling material and envelopes into which the filling material is to be inserted feeds these items from respective multiple station feeders in order to transfer a compiled set of filling material to the inserter and folding unit aligned and with identically oriented leading edges . the delivery of the filling material and envelopes for the insertion ensues without a conveyor deck and without an intermediate stop , proceeding from the programmable multiple station feeders to the folding unit integrated in the inserter . driven , common drum arrangements for both systems serve as connecting elements between the respective multiple station feeders for filling material and envelopes . the common drum arrangement allows the connection of devices for inserting mailings given a minimization of the structural size and an increase in the reliability at the same time .