GB334438A - Improvements in delivery devices for sheet printing machines, particularly intaglio sheet printing machines - Google Patents

Abstract

334,438. Maschinenfabrik Augsburg- Niirnberg Akt.-Ges. Nov. 2, 1928, [Convention, date]. Set-off, preventing. - In sheet - delivery mechanism for printing-machines comprising a number of superposed tape supports of the rollerblind type, the sheet passing from one to the other so as to dry the impression before it is finally deposited on the pile-table 24, grippers 16, 17 engage the sheet coming from the machine 9 and hold it during the unrolling of the uppermost support beneath it. The spring-rollers 2, 3, 4 of the tape-supports 14, 18, 22 are carried by a reciprocating carriage and are rotated by the engagement of a sprocket 5 on the roller 2 with a fixed rack, and intermediate gearing 7, 8 between the rollers. Fixed bars 15, 19, 23 disposed alternately on opposite sides of the table 24 have fixed thereto the free ends of the tapes 14, 18, 22 respectively. As the sheet passes from the impression cylinder 9 on to a delivery band 11 it is taken by the grippers 16, 17 on the reciprocating carriage which, at that moment, is adjacent to the cylinder. As the carriage moves away from the cylinder, the tapes 14, 22 are unrolled and the tapes 18 rolled up. The grippers 16, 17 release the sheet at the end of the movement away from the cylinder, and as the carriage returns to its initial position the tapes 14 roll up and drop the sheet on to the tapes 18 which are being unrolled. During the next movement of the carriage, the tapes 22 receive the sheet from the tapes 18, and so on until the sheet is deposited on the pile 24.