Abstract: This sheet feeder apparatus is provided with pick-up heads for the sheets which heads are tiltable in at least one plane or in two planes automatically during the operation of the apparatus to properly align and/or stretch the sheets as they are picked-up from a stack and advanced for further handling. Thus, the pick-up heads are supported on support blocks and spring biased whereby the biasing forces tend to pull a sheet into proper alignment and/or to stretch a sheet without damaging the sheet.