Patent GB-289905-A (GB)
Title: Machine for combining and simultaneously perforating and strip gumming sheets of paper in sets
IPC: B65H39/043
Filed: 1927-10-14
Abstract: 289,905. Caxton Machinery Co., Ltd., and Pullan, S. W. Oct. 14, 1927. Associating-apparatus; gumming-apparatus.- In machines for collating and connecting together by strip-gumming sheets of paper in sets of two or more, for duplicating or manifolding purposes, and perforating the sets of collated sheets, the sheets are fed in succession and registered by a front lay and collated upon a cylinder provided with two sets of automatically operated grippers, one set being adapted to grip the sheets as they are fed singly into the machine, and the other to grip the sheets as the grippers of the first set open to receive successive sheets. The rotary cylinder is constituted by two discs or end walls 1, Fig. 3, connected by a peripheral plate or wall 2 which does not extend completely around their peripheries, thereby forming a gap between the ends of the plate and leaving the interior of the cylinder open. The shaft 5 of the cylinder is connected by gearing 7 to a driving-shaft 8. A rocking shaft 10 disposed above the cylinder and parallel to the shaft 5 is supported between the end plates 6 of the machine and is provided with a series of arms 11, Figs. 1 and 3, each having a curved projecting portion 12. and a downward extension 11<a>, the portions 11<a> forming the front lays or stops against which the sheets are fed from a board 13. A sheet is fed by hand between a stationary guide 73 and the curved arms 12, and its front edge is gripped by the automatically opened main grippers 18, so that it is carried around with the cylinder and has one of its side edges gummed by disc .36 rotating in contact with a disc 40 which dips into an adjustable gum bath 41. The disc 40 is positively rotated by gearing driven from the pinion 7. The roller 36 is mounted upon a lever 37 controlled by a two-armed lever 38, 39 connected by links 50, 49 to a shaft 47 which is adapted to be rotated either automatically at predetermined intervals, or by a treadle 43 connected to it by a link system, thereby causing the gumming-disc to roll upon the roller 40, out of contact with the edge of the paper. Before the grippers 18 are opened to receive the second sheet of the set, the front edge of the first sheet is gripped by the auxiliary grippers 27, the grippers 18 subsequently opening to register and grip the second sheet. In a similar manner the grippers open to receive the successive sheets of the set, the mechanism controlling the gumming-disc being actuated to prevent the application of gum to the last sheet of the set. The shaft 47 is provided with arms 51 supporting a, shaft 52 carrying delivery discs 53, preferably of indiarubber, arranged so that they are pressed against the plate 2 of the cylinder when the shaft 47 is rocked, and simultaneously a pin 74 on an arm 75 carried by one of the arms 51 operates the main grippers and releases the completed set of sheets which are delivered down a stationary guide to presser rollers 64, 66. The shaft 52 of i the delivery discs 53 is provided with a sprocket I wheel, driving a chain 56 which drives a sprocket wheel 54 on a sleeve mounted loosely on the shaft 47, and through a sprocket 57 on the sleeve drives a chain 59 which drives the shaft 58 of lower perforating dies 60 operating in conjunction with upper perforators 61. The shafts of the perforators 60, 61 are geared together and the latter is geared to the upper presser roller 64 which is also geared to the lower pressure roller 66 mounted on pivoted arms 67 controlled by a spring 70. A stationary stripper 72 is provided to remove the sheets from the perforators. The shaft 10 carrying the front lays 11<a> is rocked by a cam 14 on one end of the cylinder engaging an offset arm 15 on the shaft 10, a returning spring 16 being provided. The main grippers 18 are mounted on a shaft 17 supported between the end walls of the cylinder and located adjacent to the forward end of the peripheral wall 2. The shaft is rocked to close the grippers by an offset arm 20 on one end of the shaft striking a stop 19 on the adjacent frame side 6, a stop 23 being provided on the other side 6 to actuate an offset arm 21 to open the grippers. The auxiliary grippers 27 are secured on a shaft 26 which is supported between arms 25 on a shaft 24 pivoted between the cylinder end walls. The shaft 24 is provided with an arm 28 carrying a roller 29 which bears upon one side 30 of a channel cam 30, 31 secured to the right-hand frame side 6, and an arm 32 on the shaft 26 carries a roller 33 which bears upon the other side wall 31 of the cam. Springs are provided to press the rollers upon their respective cam surfaces. The automatic mechanism which may he provided as an alternative to the treadle for rocking the shaft 47 comprises a striker or star-wheel arrangement consisting of a toothed wheel having, for example, twelve teeth and mounted adjacent to the cylinder so that it is engaged by a pin mounted thereon and is turned one tooth for every revolution of the cylinder. The toothed wheel is provided with twelve holes adapted to receive pins which project from its face, so that when it is desired to collate sheets in sets of three the pins are inserted into the first, fourth, seventh, and tenth holes and are adapted to engage a lever mounted on the rocking shaft 47, thereby preventing the gumming of the third sheet and operating the delivery and perforating mechanism. By varying the arrangement of the pins the sheets may be collated in sets of two, four, or six, or a five or ten-toothed wheel may be substituted to collate the sheets into sets of five.