Abstract: A roll feed apparatus suited for use in automatic manufacturing machines, in feeding a sheet-like material intermittently. The apparatus comprises a main sector roll and a sub-sector roll adapted to cooperate with each other in clamping therebetween the sheet-like material and in feeding the same. The main sector roll and the sub-sector roll are operatively connected to each other through sector gears. The main sector roll is operatively connected to a rocker shaft which is adapted to be rocked in rotational direction so that the main sector roll and, hence, the sub-sector roll are made to rock as the rocker shaft makes a rocking rotation. A connection device is provided for operatively connecting the main sector roll to the rocker shaft in such a manner that the rocking angle of the main sector roll for a given rocking angle of the rocker shaft is changeable.

Abstract: A roll feed apparatus comprises a main roll (4) and a subroll (8) adapted to cooperate with the main roll to feed a flat workpiece (7) in a clamped state on a step-by-step basis. The main roll is mounted on an output shaft (2) of an intermittent motion mechanism (3) to be intermittently rotated in one direction. The subroll has a rotation-transmission roll (8a) disposed at one axial end of the subroll and is rigidly mounted on a subroll shaft (6) which is rotatably supported in a roll housing (5a) through an externally rotatable eccentric flange (10), and a workpiece-engaging roll (8b) supported by the rotation-transmission roll and surrounding the subroll shaft. The rotation-transmission roll has a peripheral surface which makes rolling contact with the main roll for transmitting rotation, and is movable toward and away from the main roll to adjust contact pressure between the main roll and the rotation-transmission roll upon rotation of the eccentric flange.