GB636229A - Improvements in or relating to a rotary sheet-fed unit type printing press - Google Patents

Abstract

636,229. Printing-machines. HARRISSEYBOLD CO. July 9, 1947, No. 18135. Convention date, July 30, 1946. [Class 100 (ii)] A printing-machine, which is especially applicable for printing two offset impressions on relatively small sheets (e.g. 17 by 22 inch up to 25 by 38 inch) is constructed of two units arranged close together with one unit higher than the other, and so arranged that access can be obtained to the plate cylinder of the higher unit over the inking mechanism of the lower unit. As shown, the sheets are fed over a table 17 to grippers 30 of the impression cylinder 14 of unit A which co-operates with a plate cylinder 12 and offset cylinder 13 arranged directly below the cylinder 12. The printed sheets are transferred by a gripper cylinder 23 of twice the diameter of the cylinder 14 to the impression cylinder 17 of unit B which is arranged similarly to the unit A but with the offset cylinder 16, and impression on cylinder 17 in the same horizontal plane. The sheets are delivered to a stacking device by grippers 32 on a chain 33 which passes under platforms 35, 36 from which access to the cylinders of unit A can be obtained by reacting over the inking-mechanism of unit B as shown. The units A, B are inclined to the horizontal at between 30 and 60 degrees. The transfer cylinder 23 may be replaced by a gripper chain, or by a set of three transfer cylinders of the same size as the impression cylinders 14, 17. Guards 37, 38 are provided.