Patent GB-189813392-A (GB)
Title: Improvements in Reciprocating or Traveling Cylinder Web Printing Machines.
Inventor: MARKS GEORGE CROYDON
Filed: 1898-06-15
Granted: 1899-05-06
Abstract: 13,392. Marks, G. C., [Wood, H. A. W.]. June 15. Cylinder machines with plane printing-surfaces; rotary machines.-Relates more particularly to reciprocating cylinder machines for printing on webs. Fig. 3 shows, in section, a two-cylinder or perfecting machine. The cylinders 31, 38 reciprocate over the stationary formes A, B, and are mounted in reciprocating carriers C moved by a crank-pin 54 on a bevel-wheel 52. In the carriers are inking-mechanisms F supplied from ducts E on the framing. (1) The first improvement relates to means for manipulating the web so as to keep the part round the cylinder stationary relatively to the bed during the impression. The web w is continuously fed into the machine from the roll W by a feed-drum 24 and tapes 25, and passes round rollers 29, 30, under the cylinder 31, round rollers 32, 33 and guide-rollers 34, 35, round rollers 36, 37, 39, 40, and the cylinder 38, and thence round the guide-roller 41 to the continuously-driven feeding-out drum 42 and tapes 43. The rollers 29, 33 and 36, 40 are mounted in the cylinder carriers, and the rollers 30, 32 and 37, 39 act as looping-rollers for the web. The rollers 30, 32 are mounted in the ends of beams 75 on a shaft 74 journalled in the carriers, and the rollers 37, 39 are similarly mounted on beams 80 on a shaft 79. The shafts 74 and 79 are oscillated so that during the impression the section of web between the rollers 29 and 33 and that between the rollers 36 and 40 is properly manipulated or controlled. The oscillating motion of the shafts 74, 79 may be effected by a cam which oscillates a shaft mounted along the side of the machine and having a sleeve moving longitudinally with the cylinder carriers, on which sleeve are arms connected to arms on the shafts 74, 79. In a modification, the cam or two cams are mounted to rotate with but slide upon the longitudinal shaft, and are reciprocated with the cylinder carriers. The cams oscillate arms on, or connected with the arms on, the shafts 74 and 79. In another modification, described in relation to a single-cylinder machine, the longitudinal shaft is oscillated by a cam, and is geared by bevel-wheels with the beam shaft 74. As the whole of the web except the sections referred to moves continuously, the guide &c. rollers, such as 34, 35, may be positively driven. The movable rollers 32, 37 may be omitted, and only the rollers 30, 39 be used, in which case the whole of the web between the rollers 30, 39 has an intermittent movement. (2) Means for associating the product for the production of papers with various numbers and sizes of pages. The roller 42 is provided with grooves, with either of which a slitter may co-operate to divide the web longitudinally. One portion of the web passes direct to the folder 122, and the other is passed over diagonal turners and guide-rollers and associated so as to pass to the folder with the other part. Two parallel turner bars are arranged at one side, and the guide-rollers are duplicated, so that webs of different widths may be operated upon, without adjustment of the turners and guides. In another arrangement, an additional cutting-groove is provided in the roll, and an additional turner, for cutting the web into three portions and associating them. The associating-mechanism is stated to be generally applicable. (3) Driving-mechanism by which the machine may be driven at slow or fast speed, or the web-feeding mechanism may be driven alone slowly for threading or for pasting together a broken web. The driving-belt is movable on to a central loose pulley and on to a driving-pulley on each side of it, a brake being applied to the flywheel when the belt is moved on to the loose pulley. One of the driving-pulleys is fixed on the driving-shaft, and drives it at full speed. The other driving-pulley drives the driving-shaft at slow speed through a train of gearing and ratchet mechanism. The web-feeding mechanism is driven at full speed by gearing from the driving-shaft through a ratchet mechanism, and is driven at slow speed through a ratchet from the slow-driving train. By disconnecting the ratchet which operates the driving-shaft slowly, the web-feeding mechanism may be driven alone slowly. As the feeding-in drum is driven, as just described, through ratchet mechanism, it can over-run when the feeding-out drum takes up more web than is fed in, and breakage of the web may be thus prevented. The driving-mechanism is stated to be applicable to web-printing machines generally.