Patent GB-630009-A (GB)
Title: Improvements in printing machines
IPC: B41F13/00
Filed: 1946-02-14
Abstract: 630,009. Printing-machines ; feeding webs; delivery apparatus. HOE & CO., Ltd., R. Feb. 14, 1946, No. 4670. Convention date, Feb. 15, 1945. [Classes 100 (i) and 100 (ii)] A multi-unit rotary printing-machine especially applicable for printing newspapers is constructed with framework adapted to enclose the driving-mechanism at the same time permitting access to the operating parts through removable panels, the driving mechanism for the printing couples being so arranged that it does not prevent the operator from entering a rectangular opening or passage 41, Figs. 1 and 9, formed in the box-type front and side frames 44a, 44b within which is arranged the driving-gears of the printing-couples. As shown, three perfecting units 17, 18, 19 are employed and the centre couple 19 is reversible. The web rolls are mounted in reels 15 supported in brackets 27 carried by supporting columns 26 which are connected by spacing supports 28 to form a substructure which carries the frames 44a, 44b. The frames 44a, 44b are also connected by spacer frames and are fitted at the top with caps 47a, 47b, supporting columns 29 carrying web forwarding units 21 which advance the printed webs to slitting rolls 212, 213, and turning bars 217 and delivery rolls which act to associate the split webs and if desired associate the slit webs with other webs 219 coming from a different machine, before passing to a folder 23. The frames 44a, 44b are adjustable longitudinally of the supports 26, 28 to which they are connected by bolts 36, Fig. 2A, engaging T-slots 33 in the frames. The driving-shaft 22 is mounted in ribs 50 on the front frame 44a, and is formed of sections 66 joined by couplings 67. A driving-motor 59, Fig. 4, for each couple is mounted in brackets 61 secured to tubular members 57 bolted to the side frames, and is fitted with a ventilating hood 63, and the shaft 22 is driven by bevel gears from the motor, and drives the folding &c. mechanism by bevel gearing and a vertical shaft 77, Fig. 1. The printing- couples are driven by chains 94 which are arranged to travel in the path indicated in dotted lines in connection with the unit 18, Fig. 1, and are provided with tightening means. The driving sprockets 93 of the chains are driven by bevel gears from the shaft 22, and the shafts 88 which transmit the drives are provided with rollers 89 which act as web guides. The bevel gear 78 associated with the unit 19 can bv means of a clutch be driven by either of two gears 73, 74 so as to enable the drive to be reversed. The chain 94 drives a wheel 96 on the shaft 97 of the impression cylinder 108 which coacts with a printing-cylinder 123. The second couple 113, 122 is driven from the first couple by means of a helical gear 109, Fig. 2B, engaging a helical gear 111 on the shaft of the impression cylinder 113. The gear 109 can be displaced axially by screw-and-nut mechanism comprising three screws operated by a sprocket chain so as to be moved out of gear with the gear 111. It is withdrawn into a recess in the wheel 96. A gear 158 can then be brought into engagement with the gears of each impression cylinder 108, 113 so as to drive the second impression cylinder in the opposite direction to that in which the gear 109 moved it. The gear 158 is operated by screw-andnut mechanism operated by a, wrench (Fig. 5, not shown). The inking-rollers 128, 129, Figs. 2A, 2B, are driven from the printing-couples by helical gearing comprising a train of gears 131, 132, 133 and ink is supplied by a pump 142 of the kind described in Specification 617,971. The inking rollers 138, 139 in contact with the formes are supported by cam brackets 145, as described in Specification 608,863 and are reciprocated longitudinally by means of screw-and-nut mechanism. Ink is supplied by the pump to an ink rail 153 supported by a pair of fluid pressure cylinders 154 which raise and lower the cylinders and also a bracket 151 supporting the pump 142.