GB115440A - Machine for Cutting Paper, Fabric and the like. - Google Patents

Abstract

115,440. Berry, B. F. Aug. 2, 1916. Guillotine type. - In apparatus actuated by fluid pressure and intended for the cutting of a pile of bonds, banknotes, tags, labels, &c., a link-suspended knife is alternately moved towards and away from the table by effecting a connexion first with a highpressure fluid tank and then with a low-pressure tank. During the cutting-operation, the work is held by a clamp which is also actuated from the fluid tanks, the knife and clamp being actuated by separate piston mechanisms. The knife 21 is detachably fixed to a bar 41 carried by a beam 43 which is slidably mounted in the standards 46, 46<1> of the machine and suspended by links 48, 50. The link 50 is connected to a piston-rod 51 working in a clyinder 52 which is pivoted at 60 to the bed-plate 59<1>, a port 55 being connected to the high-pressure tank 31 by a flexible tube 56 and a pipe 59 with an intermediate valve 57 and hand-lever 58. A port 53 at the lower end of the cylinder is connected by a flexible tube 54 to the low-pressure tank 37, and the valve 57 is fitted with an exhaust port 61. A clamping-member 20 with grill 23 has end pins 25 connected by rods 30 to an arm 29 which is actuated from a cylinder 27 fitted with ports 32, 38 for connexion with the high and low pressure tanks respectively, a valve 34 with handlever 35 and exhaust port 40 being provided in the pipe 36, 33 connecting the cylinder with the high-pressure tank. The levers 35, 58 may be connected by a link 62 with a pin-and-slot attachment 64, 63 to the lever 58. The knife operates with a swinging cut, and in order that it may be adjusted so that its edge will just come down into contact with the upper face of the table, the pins 65 connecting the links 48, 50 with the knife beam 43 are provided with eccentric disks journaled in the beam, and the pins are secured to worm-wheels actuated by hand-adjusted worms 68. For automatically starting the knife beam on its upward stroke, the link 50 is fitted with an adjustable screw 76, Fig. 14, which is adapted to engage the valve-pin 74 of a valve 69 connected by a pipe 75 with the pipe 33 and by a pipe 77 with an extra cylinder 78. The opening of the valve in this way allows fluid to pass to the cylinder 78 so that, by means of the piston-rod 79 and lever 80, the valves 34, 57 are actuated. A small vent 81 allows compressed fluid to escape from the cylinder 78 when the hand-levers are reversed by hand to effect the down stroke of the knife. The pressure in the high-pressure tank is maintained by a compressor, and for the purpose of maintaining a constant low pressure in the tank 37 it is connected to the tank 31 by a pipe 82 fitted with an equalizing-valve 83.