GB187071A - Improvements in and relating to paper feeding machines - Google Patents

Abstract

187,071. White, A. E., (Cross Paper Feeder Co.). Aug. 10, 1921. Sheet registering-devices and carriers; dropping-roller and like sheet feeds; gripper mechanism. -Sheets are fed to printing and like machines by forwarding devices moving at a constant high speed which is maintained until the front stops are nearly reached, the sheets are then slowed down quickly and released before the stops are reached, the sheets being grasped by their front edge and drawn against the stops. The sheets are separated by known means, such as combing rollers, forwarded by constantly driven rollers 4 coacting with drop rollers 2 mounted in lever arms 10, and are finally fed by rollers 12, 14 driven at the same speed as the rollers 2, 4. The rollers 14 are mounted in resilient arms 48 which can be depressed by cam and lever-and-link mechanism to release the sheet. There are two rollers 12 symmetrically arranged on a constantly driven shaft 21 provided with hubs about which segment rolls 18 are freely mounted, and oscil. lated by cam and lever mechanism. The rolls 18 also co-operate with the pressure rolls 14, and are of larger diameter than the rolls 12, so that when the sheets are gripped between the segments 18 and rolls 14, the rolls 12 are out of action. The rolls 18 are given a variable motion and soon decrease the speed of the sheet, until it is nearly at rest. The sheet is then seized by grippers 20 carried by a reciprocating rod 82, and is carried by the grippers against the front stops 16. The grippers are opened to take the sheet by pins 86 on the front stops acting on arms 88 projecting from the upper jaws of the grippers.