Patent GB-333579-A (GB)
Title: Improvements in and connected with printing machines
IPC: B41F1/26
Filed: 1929-05-15
Abstract: 333,579. Chapman, C. F., and Saunders, S. Y. May 15, 1929. Platen machines.-A platen machine, indicated by dotted lines in Fig. 3, is adapted for printing on webs by the provision of an attachment or subsidiary machine comprising a frame 1 in which is mounted web feeding winding, and cutting devices, and the auxiliary machine may be connected to and operated by the platen machine. The web is guided between the printing-members 26, 27 by rollers 24, 25, and on its way may be printed with stripes of colour by discs 20 inked by pads in a vessel 21. Set-off, preventing. The printed web is dusted with powdered chalk supplied by a perforated drum 34 and spread by a brush 35. Surplus powder is removed by a stationary corrugated drum 38. The web is fed from a reel 4 mounted on the hexagonal part of a shaft 3 mounted in slots 5 in the frame 1. The web is advanced by friction rollers 39, 40, 41 which are rotated intermittently in the same direction by gearing from a shaft 69 operated by adjustable ratchet mechanism from a projection 64 on the platen side arm 63. A connecting-rod 66 is adjustably connected to a pin pivoted to the projection 64, and the rod 66 oscillates an arm 68 about the axis of shaft 69. An adjustable screw 73 transmits motion to a second arm 70 fitted with a pawl 71 engaging a ratchet 74 on shaft 69, and the arm 70 advances the ratchet as the platen makes its inoperative stroke, and the return movement of the arm 7 is limited by an adjustable linkage 75, 76, which permits the extent of feed to be adjusted in accordance with the length of ticket printed. The reel 4 is acted on by a band brake 11 anchored at 2<a> and fitted with a weight 13, and the shaft 3 is braked by a lever arm 7 engaging a pulley 9 on shaft 3 and operated by a screw 10. To enable the reel to be adjusted transversely, a forked arm 15 engages the pulley 9 and moves the reel transversely. The arm 15 is operated by a screw 16, and the rod 7 is moved transversely with the reel owing to its pivotal connection with an arm 18 integral with the arm 15. The printed web passes over a tensioning-rod 28 mounted between springs 30 on screws 29 fitted with nuts 31. From the feeding-rollers 39, 40, 41, the web passes over a roller 47 to slitting-rollers 48, 49, which may be adjustable to sever the web into sheets of variable widths. The strips then pass over guide rollers 50 fitted with fences to separate the cut strips, and the cut strips are either wound up. on a reel spindle 53<1>, or are led to perforating, scoring, pasting, colouring, and like devices, and may be cut transversely and delivered by stacking mechanism, or may be led to zig-zag folding devices. The winding-reel 53 is driven frictionally by rubber-surfaced rollers 51<1> against which the spindle 53<1> is pressed by the action of weights suspended from arms 57 which bear on lugs on pivoted arms 54 carrying the spindle 53'. The completed reel can be removed by giving a pivotal movement to the arms 54, and the remaining portion of the web is held by a clip 62 to a tensioning roller 52 during removal of the roll. Separating fences 59 may keep the severed strips apart as they pass to the winding devices.