Abstract: Apparatus for conveying one or more sheets of paper. The apparatus includes a supporting housing; a first, upstream pulley and a second, downstream pulley rotatably mounted on the housing; a lower, endless, elastic belt mounted on the first and second pulleys, the belt having an upper and a lower reach, the reaches being substantially horizontal; a third, downstream pulley rotatably mounted on the housing above the lower belt; a fourth, upstream pulley rotatably mounted on the housing above the lower belt, the fourth pulley biased toward the lower belt; and an upper, endless, elastic belt mounted on the third and fourth pulleys, whereby the fourth pulley can move away from the lower belt when the thickness of the sheets being conveyed requires a larger gap to engage the upper belt.

Abstract: A system embodying the present invention includes first structure having a first area for stacking at least one sheet to form a first collation, second structure having a second stacking area adjacent to the first stacking structure for stacking at least one sheet to form a second collation, and diverting structure arranged in a sheet path between the feeder and the first and second stacking structure for diverting the sheets fed by the feeder. The diverting structure having first and second operative positions for respectively diverting the sheets to the first stacking structure and to the second stacking structure. The system further provides control structure operatively coupled to the diverting structure for actuating the diverting structure to one of its operative positions and sensor structure operatively connected to the control structure for sensing when a sheet is conveyed to the diverting structure.