Patent GB-189824174-A (GB)
Title: Improvements in Printing and Sheet Delivering Mechanism.
Inventor: SCOTT WALTER
Filed: 1898-11-16
Granted: 1899-04-15
Abstract: 24,174. Scott, W. Nov. 16. Rotary machines; folding paper.-Relates to machines, particularly web machines, for printing in one or more colours. Fig. 1 shows five web-printing machines A, B, C, D, E, supplied with paper from four rolls W, W<2>, W<3>, W<4>, and provided with a folder F, and driving and brake mechanisms which are partly shown in Fig. 5. The machines A, B, C, D, E are arranged one above another, and each comprises two printing-rollers t and two impression rollers i, of the usual kind. The webs w, w<2> pass over guide-rollers a, b, and after the printing and perfecting processes are led over rollers d, f, g, k, l to the folder F. The web w<3> may pass through the machine C, directly to the folder, or may pass between the first impression and printing rollers of machines C, D or C, D, and E, and then between the second pairs of rollers of these machines, before being led to the folder F. Rollers n, provided with collars o, assist in the folding operation. The second impression cylinders of all the machines are driven by bevel gearing 52, Fig. 5, and the vertical shaft 51, and the first impression cylinders of the machines A, B, C are driven directly from the second impression cylinders of these machines. When the web w<3> is to be run from the machine C through the machine D, or machines D, E, the first impression roller of the machine D is driven by gearing from the first cylinder of the machine C ; in other cases it is driven from the second impression cylinder of the machine D. Ink-distributing rollers 55 are arranged beneath the ink cylinders 56, for the machines D, E, and distributing-rollers are also arranged above the cylinder 56 of the machine D. The machinery is driven from a shaft 68, carrying a loose pulley 65, slow pulley 66, and fast pulley 67, provided with a belt-shifter, 64, connected by the lever 63 and link 61 to a handle-bar 57. Upon one or more of the impression cylinders i are fitted hand-brakes 75, actuated by means of a rod 74 and links 72, 71 connected to an arm on the shaft 60 which carries the lever 63. In another arrangement of printing-machinery, a number of web-perfecting machines are arranged with their cylinders substantially parallel, and the webs are associated and pass over a single turner, and thence over guides to a longitudinal folder having cylinders parallel to the printing-cylinders. After leaving the longitudinal folder, the webs pass between cutting-cylinders and folding-rollers to the delivery tapes. Reference is made to Specification No. 4790, A.D. 1886. In a third arrangement of printing-machinery, there are four web-printing machines and two folding-apparatus, one of which may be used for folding the four associated webs, if so desired. The impression cylinders of the lower two machines and the lower folder are actuated from one shaft by means of toothed gearing, and the upper pair of machines and upper folder are driven by means of toothed gearing from an independent shaft. These two driving- shafts may be connected by gearing, when desired. In a fourth arrangement, there are four webprinting machines, arranged one above another, from which the webs pass to two folding-machines, or to two pairs of folding-machines when a double-width web, or two single-width webs, are employed. The webs from the upper two printing-machines, or one of these webs, may be associated with the lower webs and folded by the lower folding-machines. Each of the upper folding-machines comprises a longitudinal folder, cutting or perforating cylinders, and a transverse folder having a gripper-cylinder within which are folding-blades for folding the sheets. The grippers and folding- blades are described in Specification No. 7860, A.D. 1896. One of the upper pair of folding-machines is provided with one set and the other with two sets of delivery tapes. The associated sheets collected by one of the upper gripper cylinders may be periodically transferred to the other gripper cylinder by suitably actuating the gripper, or single sheets may be similarly transferred. Each of the lower folding-machines comprises two gripper cylinders, each having two sets of grippers and delivery apparatus with tapes arranged differently from those of the upper folding-machines. In a modification, the above-described upper and lower folding-machines are interchanged, and are provided with adjustable or fixed guides for directing the course of the webs. In a fifth arrangement of printing-machinery, there are four printing-machines arranged one above another, whence the webs pass, after being associated in any desired manner, to folding-machines having longitudinal folders and transverse folders with folding-blades -which may be of the kind described in Specification No. 7860, A.D. 1896. The cutting-cylinders are provided with movable sheet-retainers, and the delivery mechanism is of the kind described in Specification No. 7860, A.D. 1896. In a modification, two longitudinal folders or turners may be used acting in succession on the same web or webs, and each provided with a separate cutting and delivery mechanism. In a sixth arrangement of printing- machinery, there are three printing-machines arranged one above another for printing single-width webs, which are associated and pass over a longitudinal folder to one or other of two sets of cutting, folding, and delivery mechanisms. The gripper cylinder of one of these may be constructed in the manner described in Specification No. 7860, A.D. 1896, and the delivery apparatus is substantially the same as that described in Specification No. 7860, A.D. 1896. As the webs leave the printing- machines, paste is applied in strips by means of discs mounted within paste troughs, or by means of revolving blades. Paste may be applied to the webs by means of a paste roller or revolving blade situated beneath the longitudinal folder. The internal guide of the longitudinal folder is longitudinally grooved to allow the pasted parts of the web to travel without being smeared. Fig. 26 is a sectional view of part of a printing-cylinder P provided with special means for holding the printing-plates. The plates p are formed with bevel edges c, which engage with correspondinglyshaped clamps C, fitted within longitudinal grooves formed in the cylinder. The clamps can be actuated by means of two sets of screws e, f, of which one is hollow and fits over the other. The screw e is provided with a collar g, against which the screw f bears, and the screw f is formed with a collar h which bears against a ring b closing the ends of the slots. The circumferential row of printing-plates p<1> next to the plates p or nearest the opposite end of the cylinder P, when there are more than two rows of plates, may abut against an undercut ring secured to the cylinder. The plates may be adjusted circumferentially by means of clamps fitted within grooves in the cylinder P and actuated by means of screws.