Sheet feeding apparatus

Sheet feeding apparatus including a modularly constructed input-output device comprising:

• a. a rigid mounting frame;
• b. first rotatable means having a first axis of rotation, the first means including an input shaft and a first member attached thereto, the input shaft rotatably attached to the frame, the first member including an outer wall and a hub, the outer wall having an inwardly facing surface portion, the hub having an outwardly facing surface portion, the surface portions defining opposed circularly-extending paths of travel when the first means is rotated;
• c. clutch means mounted on the input shaft, said clutch means adapted to be driven from a source of supply of rotational movement, said clutch means being energizeable in response to a sheet feeding demand signal for imparting the rotational movement to the input shaft for rotation of the input shaft and thus the first means in a given direction;
• d. second rotatable means having a second axis of rotation, the second means including an output shaft and a second member attached thereto, means for rotatably supporting the output shaft, said supporting means movably attached to the frame to permit adjustably fixedly positioning the second rotatable means relative to the first rotatable means for proper disposition of the second member in the paths of travel of the surface portions of the first member;
• e. said surface portions arranged relative to one another to permit one of said portions to rotate said second means in one direction when said first means is rotated in said given direction and to permit the other of said surface portions to rotate said second means in the opposite direction when the first means is rotated in said given direction, whereby said output shaft alternately rotates in opposite directions when said input shaft is rotated in said given direction and
• f. said output shaft adapted for transmitting rotational movement thereof from the device.