Patent GB-801353-A (GB)
Title: Improvements in or relating to rotary duplicating machines
IPC: B65H29/16
Filed: 1955-03-02
Abstract: 801,353. Sheet-delivery apparatus. RITZERFELD, W., and RITZERFELD, G. March 2, 1955 [March 8, 1954], No. 6172/55. Class100(1) A rotary duplicating machine comprises a printing drum 1 (Fig. 1), a counter pressure roller 2, copy sheets 3 being fed from a tray 4 past a moistening device 7 to be printed by the drum 1, a series of delivery bands 18 driven by a motor 23, which also drives the drum 1, and a table 8 pivoted at 9 on to which the printed sheets are initially delivered. The table 8 is provided with slots through which the delivery bands 18 may pass when the table is pivoted to its lower position. Movement of the table is effected by a link 10 which is operated by cam 11 on the drum 1 through linkage 12, 13. The delivery bands 18 are trained around pulleys 19 one of which is driven. by the motor 23. With the table 8 in its raised position a printed sheet is delivered thereto, continued rotation of the drum 1 causing the table to be lowered so that the sheet is taken by the bands 18 and delivered to a tray 20. The tray 4 may have a transparent bottom so as to allow viewing of the printed sheet in the tray 20. The table 8 has a pivotable extension 21 for large sheets and a portion 22 may be folded upwardly when the tray 20 is emptied. For maintaining the table 8 in its raised position a push-rod 15 which operates link 10 via a lever 14 is provided. The table is raised by moving the rod 15 to a position where a notch 16 is engaged by fixed lug 17. Delivery of the printed sheets on to the table 8 is assisted by rollers 30, pivoted to the machine frame and capable of following the movement of the table. In a second embodiment. (Figs. 3 and 6) the delivery bands 93 which co-operate with the pivotable table 8 are capable of being driven in either direction so as to deliver the printed sheets either to a receiver 127 or a receiver 128. Drive for the bands 93 is derived through a belt 112 which runs over a tensioning pulley 124 and one or other of pulleys 115, 116 on a pivoted plate 117, movement of which is effected by a push-rod 122. The pulleys 115 and 116 are continuously driven by a belt 118 passing also around a pulley 119 on a hollow shaft 113 driven by the motor 120. By pivoting the plate 117 the direction of rotation of the belt 112 and thus the bands 93 is changed depending on whether the belt 112 is engaged by the pulley 115 or 116. The pulley 119 is integral with a pulley 135 rotatably mounted on the shaft 113. A second motor driven pulley 133 is also rotatably mounted on the hollow shaft 113. The shaft 113 may be keyed, by movement of a rod 136 to either the pulley 133 or 135. Both pulleys are continuously driven by motor 120 so that the delivery bands 93 are continuously driven at a constant speed. Moreover, the drive for the drum 1 is derived from belts 125 running around a pulley fixed to shaft 113 and the speed of rotation of the drum 1 is thus dependent on the speed of rotation of the shaft 113. The drum 1 may therefore be driven at different speeds depending on which of the pulleys 133 or 135 is keyed to the shaft 113. In a further embodiment (Fig. 7, not shown) the direction of travel of the delivery bands may be reversed by rotatably mounting on a motor driven shaft, such as the shaft 113, two pulleys connected by belts to driving pulleys for the delivery bands. The pulleys are so mounted that either can be keyed to the driven shaft. The belt between the delivery bands and one of the pulleys is twisted whilst the belt to the other pulley is not so that according to which pulley is keyed to the shaft so the delivery bands travel in one direction or the other.