paper which are e g to be fed to a printing machine not shown by means of known devices not shown which form no part of the invention it should be understood that there may of course be more than two of the supports t and stacks of sheets s or that only a single one of each may be provided the devices for feeding the sheets s to the working station e g the above mentioned printing machine successively remove the respectively uppermost sheet s from each stack to assure that no withdrawn sheet has a subjacent sheet clinging to it it is conventional practice to blow compressed air from laterally against the respective stack as indicated diagrammatically by the nozzles n so that the air enters between the sheets and tends to separate them when this is done however the moving cushion of air between the sheets s in the upper part of the respective stack causes these sheets which do not have a weight acting on them as do the sheets in the lower part of the stack to 34 float 34 and to shift transversely relative to one another since this is undesirable because it causes the sheets to move out of their proper feeding positions and results in machine shut down the earlier described prior art hold down devices have been proposed however for the reasons explained previously these devices are not satisfactory as shown in the drawing the device according to the present invention is provided for each support t and.