GB191517509A - Machine for Cutting and Folding Running Webs. - Google Patents

Abstract

17,509. Goss Printing Press Co., [Goss Printing Press Co.]. Dec. 14. Cutting and delivery apparatus.-Relates to a machine for cutting and folding running webs and which embodies cutting-apparatus of the kind described in Specification 12,721/15, in which the shearing-blades are arranged diagonally to the run of the web and a device draws back the web to a gradually decreasing amount from one edge to the other to compensate for the diagonal set of the blades. In the machine shown in Fig. 1, the web x is cut into sheets by pairs of blades 7, 9 and 6, 10 arranged diagonally on cylinders 4, 8, and the compensating - device comprises ribs 16 on rotary disks or supports 18 coacting with grooves 15 in the cylinder 4, the ribs and grooves being shaped and acting as described in the above-mentioned Specification. The cylinder 4 is provided with folding-jaws 20 preferably arranged at the bottom of the grooves 15 and adapted to be moved outwards by arms 26 engaging a fixed cam 28, to push the centre of each sheet into folding-jaws 30 actuated by arms 32 and a fixed cam 35. A gripper cylinder 40 transfers the folded sheets from the cylinder 8 to a delivery belt. In the machine shown in Fig. 3, the compensating rib 55 and groove 51 are provided on rotary supports 53, 50 separate from the cutting and folding cylinders, and the sheets may be delivered either folded or unfolded. The web is cut by blades 63, 66 and 62, 65 on cylinders 60, 64, and when the sheets are folded, the leading end of each sheet is retained by impaling-pins 68, 69 until the sheet is folded by the blades 80 and jaws 92. When the sheets are delivered unfolded, a cam 118 is moved into position to act upon an arm 116 and thereby lift a set of fingers 114, which normally lie in recesses in the cylinder 64, into position to direct the sheets to a tape conveyer 110, 111. A number of sheets may be collected on the cylinder 64 and then folded simultaneously by suitably operating the folding-blades and impaling-pins. Fig. 5 shows a modification of the compensating-device in which members 122 provided with the groove and rib are slidably mounted in a block 120 reciprocated by a cam 121. While the block 120 is moving with the web, the members 122 are held in web-engaging position by springs 124; but while the block 120 is moving in the opposite direction, the members 122 are moved clear of the web by cams 125 acting through levers 123.