Abstract: A reciprocating sheet feeder for feeding sheet material into a press, such as a deep draw cupping press. The sheet feeder comprises a rocking or pivoting framework that has gripper means thereon for gripping the edges of the sheet to be fed and when the frame is rocked about its pivot axis, moving a length of the sheet into the press and then releasing the sheet prior to a return stroke for the rocking feeder.The grips of the rocking feeder thus reciprocate during use. The feeder is used in combination with edge guides that are positioned ahead of the grips with respect to the direction of movement of the sheet so that the sheet is primarily guided while under tension. The pivoting frame is made so that it does not have substantial strength in torsion or in lateral directions of the sheet, so that the sheet essentially guides the frame during the feeding stroke to avoid buckling or misguiding the sheet. The framework does have rigidity needed for moving the sheet in its longitudinal direction.