Abstract: The transmission mechanism comprises a lever (12) which can rotate around an eccentric shaft (11) of a rotating disk-crank (10). The lever (12) is guided in its movement by cam means (15a) and acts upon an arm (19) which is attached for joint rotation to an output shaft (3). Advantageously the disk-crank (10) is driven through a connecting rod (8) from another disk-crank (1) which can rotate around a shaft which is different from that of the first disk-crank (10). It doesn't require adjustment or setting up and it has a low cost. The transport device has on the output shaft the wheels for drawing chains with transporting bars provided with clamps for the sheets.

Abstract: A control mechanism for driving a movable lower platen in a platen press or similar machine including a fixed upper platen, the movable lower platen adapted for movement towards and away from the fixed upper platen, the machine also including a plurality of nipper bars adapted for movement between the platens to remove sheet material from between the platens. The control mechanism includes a crankshaft, a plurality of cranked levers articulated to the movable lower platen, a plurality of connecting rods, each of the connecting rods articulated to the crankshaft and articulated to one of the cranked levers, and a wheel having a groove therein on a side of the wheel facing the crankshaft in which a tenon or finger moves to change the speed of movement of the crankshaft and hence the movement of the lower platen.