GB186586A - Improvements in or relating to printing presses - Google Patents

Abstract

186,586. American Type Founders Co., (Assignees of Kelly, W. M.). Sept. 29, 1921 [Convention date]. Cylinder machines; tripping-arrangements; gripper mechanism; sheet-registering devices; delivery apparatus.-A cylinder machine of the jobbing type is constructed with a bed 12 which reciprocates on ways 11 inclined to the vertical, the sheets being fed from a table 41 approximately at right-angles to the bed and delivered to a box 82 by reciprocating grippers 73 which move over a way 64 parallel to the table 41. The various operations of the press are controlled by cams or cranks on a main shaft 15 which reciprocates the bed by a crank and a pitman 16. A rack 13 on the bed gears with and oscillates an impression cylinder 19 mounted in eccentric bearings 23 which are operated by a cam 33, lever 29, link 30, hook 34, pin 35, arm 28, arms 26 and links 25, to throw the impression on and off, the hock 34 being capable of operation by a treadle 36, link 37, and lever 38, to disengage it from the pin 35 and thus trip the throw-off mechanism The sheets are registered by a front stop 42 which is depressed by a link 45, lever 46, and cam 49, to allow them to be taken by a gripper 50 which is opened at the sheet-receiving position by the action of a swinging cam 56 on a roller 54 on an arm on the gripper shaft 51 which is returned by a spring to close the gripper on the sheet. The printing occurs in the upward movement of the bed, and when the cylinder has made half a revolution to effect the printing, the impression is thrown off and a fixed cam 62 opens the grippers 50 and a stripper 83 strips the sheet which is taken by the grippers 73. The grippers 73 are normally closed by a spring, and are opened to take the sheet by the rotation of a member 76 arranged between them, the member 76 having an arm 77 which engages a roller on a cam-operated lever arm to open the grippers to take the sheet and a pin 78 to open them to release the sheet after the carrier 63 on which the grippers are mounted has been moved to the left by a cammechanism 87, 88, 89, 90.