Patent GB-134711-A (GB)
IPC: B65H9/10
Abstract: 134,711. Forrester, H. J. C., (Michle Printing Press & Manufacturing Co.). Jan. 30, 1919. Registering sheets; sheet carriers.-Sheets are registered, as they are moved forward to the cylinder-grippers, by a revolving sheet carrier having a gauge moving at the speed of the cylinder grippers and means for moving the sheet-holding device relatively to the gauge to move the sheet up to the gauge. Front and side-registering gauges and corresponding sheet-moving devices are provided. As shown in Fig. 1 the sheet 53 is moved forward from the feed bands 54 to the grippers 12 on the cylinder 11, and during the movement is registered, by means carried by arms revolving with a shaft 13 driven by wheels 14, 15. An arm 22 revolving with the shaft 13 carries a front stop 23, and is adjustable angularly to vary the front registration by means of a screw connexion 31 with an arm 16 fixed to the shaft 13. An arm 41, loose on the shaft, carries a curved shoe 40 on the front end of which is a gripper plate 49 which grips the front end of the sheet and moves it forward against the front gauge. The shoe 40 normally moves at the speed of the front stop 23, and is caused to move forward more rapidly for the registration by a lever 27, 28 pivoted at 26 on the gauge arm 22, and having a pin-and-slot connexion 38 with the shoe 40. A roller on the arm 28 of the lever engages a stationary cam 21 surrounding the shaft 13, and which is prevented from rotating by an arm 18 engaging a cross bar 19. The gripper plate 49 is operated to grip the sheet by a rod 46 connected to a lever 35, 34 pivoted on the arm 22 and operated by a fixed cam 20. On the rod 46 is a spring adjustable by a milled nut 56, the lever 35 acting through this spring on the gripper plate 49, which is therefore closed yieldingly on the sheet and can slip off when the sheet is arrested by the stop 22, leaving its edge free to be taken by the grippers 12. Side registration is effected by mechanism, shown in Fig. 4, carried by an arm 60 revolving with the shaft 13 and provided with a side stop 64 and with a sliding shoe 69 having a gripper plate 80 similar to 49. The arm 60 is on a longitudinally movable sleeve or boss 60<a> adjustable by a screw 65 in relation to a fixed collar 66 for adjusting the position of the side stop. Stationary cams 61, 62 operate levers 73, 72 and 88, 87, respectively, for moving the shoe 69 and closing the gripper plate. A cam slot 71 on the lever 73, 72, engages a pin on the shoe. An incline 90 on the lever 88, 87, engages an arm 76 pivoted on the shoe 69 at 75 and connected by a spring rod 81 to the gripper plate 80. Fig. 6 shows a modification in which a suction device on the shoe 40 is used in place of the gripper plate, the arrangement of parts being generally the same. Suction orifices 142 in the shoe 40 communicate by a pipe 143 on the revolving arm 22' with a segmental air chamber in the boss 16a, and from this through a fixed passage, and a valve 147 with a nozzle 146 having a pipe leading to an air-exhausting device. The valve 147 is operated by a lever 134, and a cam 121 rotating with the arm 22<1>. A fixed cam 120 operates the lever 28, 27 which moves the shoe 40. A suction shoe is used also on the shoe corresponding to 69 in Fig. 6 for side registering. Fig. 11 shows a modification in which the pressure of the gripper plate 49 against the sheet 53 on the shoe 40 is effected, after the plate has been closed by the rod 46 and lever 35, 34, by means of an electro-magnet 157 on the revolving gauge arm 22". The circuit of the magnet is closed through contact brushes 155, 156 on the arm 22" which engage curved plates 153, 154 connected with wires 153<a>, 154<a> to a battery. A similar magnetic pressure device is used for the gripper plate of the side register.