Patent GB-190023561-A (GB)
Title: Improvements relating to Printing Machinery.
Inventor: NEWTON HENRY EDWARD
Filed: 1900-12-24
Granted: 1901-02-23
Abstract: 23,561. Newton, H. E., [Hoe, R.]. Dec. 24. Rotary machines ; cylinder machines with plane printing-surfaces. -The machine is provided with a single impression cylinder having two impression surfaces, and is adapted to perfect a sheet or give two impressions in colours on one side. Fig. 1 is a diagrammatic side elevation of the machine, and Fig. 9 a section of a part of the impression cylinder, showing the turning-grippers. The impression cylinder 3 has two impression surfaces 3<1> and 3<11>, the first 3<1> co-operating with a forme-carrier 6 for the first impression, and the second with a forme-carrier 9, for the second impression. The forme-carriers are preferably cylinders provided with inking-surfaces. and having inking-apparatus 12, 13 applied to them. The cylinder 3 has a set of grippers 20, which take the sheet from the feed-board 2 and hold it upon the surface 3<1> during the first impression. After the first impression, the head of the sheet is taken by grippers 25 on a transfer cylinder 14, and, when perfecting, is transferred to the grippers 28 of a second transfer cylinder 16. While the sheet is on the surface 3<1> and receiving its first impression, its tail end is seized by a set of grippers 54, 56 pivoted at 53, 55 respectively on arms 52 of a shaft 51 in the cylinder 3. At this time the grippers 54, 56 are in the position shown in Fig. 9, against the rear edge of the surface 3<1>, and the grippers 54 are opened to take the sheet by a cam 71. When the surface 3<1> has passed the cylinder 14, the shaft 51 is rocked by a cam 72 to throw the grippers 54, 56 over the gap in the cylinder to the leading edge of the second surface 3<11>. The head ot the sheet is released by the grippers 28 of the cylinder 16, and, as the cylinder 3 continues its movement, the sheet is drawn out from the transfer cylinders 14, 16, and applied to the surface 3<11>, with its unprinted side outwards, This side receives the perfecting-impression from the cylinder 9, and the grippers 56 are then operated by a cam 87 to release the sheet to the grippers 73 of a delivery cylinder 18, or to any suitable delivery apparatus. The shaft 51 is then rocked to throw the grippers 54, 56 back to the position shown in Fig. 9, by a fixed tumbler pin engaging a tumbler on a shaft 64 geared to the shaft 51. The shaft 64 is also provided with an arm co-operating with the cam 72. For giving two impressions on one side, the sheet is taken, after the first impression, by the grippers 25 of the cylinder 14, by which it is carried round and delivered to a set of grippers 93 at the leading edge of the second impression surface 3<1>, and the means for operating the shaft 51 and grippers 54, 56 are removed or rendered inoperative. The grippers 93 are on a shaft 94 in arms 52<1> of the shaft 51. and are operated by an arm 84 on a shaft 78 engaging an arm 96 of the shaft 94. The shaft 78 has an arm 80 operated by a fixed cam to open the grippers to take the sheet from the cylinder 14, and by the cam 87 to release the sheet to the grippers 73 of the cylinder 18. The shaft 78 has an arm which operates the grippers 56 to release the sheet when the grippers 54, 56 are operated for perfecting as previously described. The grippers 25 of the cylinder 14 are operated by cams 31, 33 on arms 32, 34 pivoted on the shaft 15 of the cylinder 14. The arms 32, 34 are rocked, by means of the arm 36 and a rod 37 connected to a lever 38 operated by a cam 39 on a shaft 40 driven by worm gearing 106 from the driving-shaft 98. When perfecting, the cams 31, 33 are moved so as to operate the grippers to take the sheet from the cylinder 3 and deliver it to the cylinder 16, during one revolution, and are then moved out of operative position, as seen in Fig. 1, so as to operate the grippers when they are clear of the cylinders 3, 16 and the sheet that is being reversed. When colour printing, the cam 33 is removed, and the cam 31 in one position operates the grippers to take the sheet from the cylinder 3, and in the other position to release it to the grippers 93 of the cylinder 3. The grippers 28 are operated, when perfecting, to take and release the sheet by cams 41, 42 on an arm 43, 44, 45 pivoted at 46 and operated by a rod 47 and cam on the shaft 40. The cam operates to move the cams 41, 42 out of position at every alternate idle revolution of the cylinder 16. When colourprinting, the cams 41, 42 are placed out of their operative position, and are not moved by the cam. The various cylinders are driven by gearing from the shaft 98.