Patent GB-552864-A (GB)
Title: Improvements in or relating to method of operating on a travelling web of material, and apparatus for cutting and delivering blanks
IPC: B65H29/06
Filed: 1942-05-05
Abstract: 552,864. Cutting and delivery apparatus. INTERCHEMICAL CORPORATION. May 5, 1942, No. 6056. Convention date, May 5, 1941. [Class 100 (i)] Printed webs as delivered from a printing-machine are cut and scored to produce blanks of desired configuration containing two or more blanks arranged side by side, and these are separated from adjacent multiple blanks by a tearing action after removal of waste. The blanks are then advanced by conveying tapes to a gripper cylinder D<SP>1</SP> which takes them after they are registered, and the blanks are then deposited in overlapped condition on a conveyer M<SP>1</SP> which deposits them on a descending pile table 203 fitted with jogging devices and adapted to actuate a switch 233, when the pile is high 'enough to cause the blanks to pass the cylinder D' and to be led by a further conveyer C<SP>2</SP> to a further gripper cylinder and a further delivery conveyer and table acting in the same manner as the conveyer M<SP>1</SP> and table 203. The machine can thus act continuously and quickly. The web W passes from the printing- machine to cutting and scoring rollers 15, 16, Fig. 1 preferably of the construction set forth in Specification 548,151, [Group VIII], and thence to wasteremoving rollers 18, 21 from which the blanks are advanced by tapes 25 passing over driven and tension rollers. To sever the blanks longitudinally into multiple blanks connected together transversely by uncut tab portions the web W is engaged by a pair of holding rollers 26, 27 one of which 27 is provided with a raised surface 30, and when this. grips the web W the web is simultaneously engaged by the raised part 40 of a roll 35 which is mounted in pivoted arms and is moved into and out of contact with the web by a cam 48 and rod 43. The surface 40 rotates at a higher speed than the belts 25, and so the forward set of blanks is torn from the web and is advanced to the cylinder D<SP>1</SP> by tapes 60 passing over feed, guide, and tension rollers coacting with guides 68, 70, 71, which maintain the blank at the increased speed. If it is desired to examine or remove a blank a stripper 86, Fig. 4, is caused to engage the tapes 60 after a blank passes through feed rollers 62, 63, and the blank is directed into a pivoted interceptor X which can be turned about its pivot by a handle 83 to direct a blank on to a table 84. The stripper 86 is actuated by a lever 90, rod 88 and a cam 94 on a shaft which is driven by a half-revolution clutch set in motion by a lever 126, Fig. 4. The gripper cylinder delivery device D<SP>1</SP> comprises a cylinder 130, Fig. 7, and the leading edge of the blank is directed to the cylinder by a roller 132, and the blank is registered against stops 139, Fig. 10, on the drum and subsequently gripper fingers 141 grip the blank until it approaches stripper devices 201 when the grippers are opened by a cam 145 acting on a roller 144 on the gripper shaft which acts against the pressure of springs 142a. When the leading edge of the blank is released and falls on the conveyer M<SP>1</SP> its rear edge is still pressed to the drum by means of an adjustably mounted roller 146<SP>1</SP>. The conveyer M<SP>1</SP> is formed of four sets of tapes 148, 150, 151, 152 driven at a slower rate than the drum 130 so that the blanks are delivered in overlapped condition. The blanks finally are fed between the tapes 152 and a roller 200 and over a roller 198 on to the descending pile table 203. If a blank is not fed to the gripper drum 130 a feeler roller 177 is permitted to move into a recess in the drum and causes the disengagement of a clutch which normally transmits movement to a chain 163 which drives a sprocket 161 on the shaft of the roller 157 which drives the tapes of the conveyer M<SP>1</SP>. When the pile table 203 is full the blanks are prevented from passing to the grippers 141 by means of interceptor fingers 220, Fig. 1, which are brought into action in a manner similar to the way in which the stripper 86 is controlled, and the half revolution shaft which controls the operating cam is controlled by a hand-operated lever, or is controlled electrically by the switch 233 operated by the table 203. The lever mechanism for operating the fingers 220 also operates a pivoted upper part of the cam 144 which controls the grippers 141, and these are maintained open while passing the sheet-taking position. The fingers direct the blanks to further conveyer tapes which deliver to a second gripper cylinder and overlapping conveyer delivery tapes acting in a similar manner to the cylinder 130, and tapes M<SP>1</SP>. In order to prevent the second conveyer M<SP>1</SP> from stopping before all blanks which pass to the second delivery devices are delivered the feeler roller which prevents operation of this conveyer may be tripped so that it will not put the second coveyor M<SP>1</SP> out of action immediately the first delivery devices come into action again.