Patent GB-322639-A (GB)
Title: An improved machine for perforating sheets of paper and fastening the same together
IPC: B42B5/02
Filed: 1928-11-28
Abstract: 322,639. Parker, A. Nov. 28, 1928. Setting eyelets; eyelets, feeding.- In a machine for perforating and fastening papers together, the fasteners, such as eyelets, are fed automatically from a hopper down sloping shoots under the control of an escapement device, and are then received by dies which are operated by a hand lever to cause the clinching of the fasteners and the simultaneous perforation of the sheets near the edges thereof. An inclined spindle 4 passing through the hopper 1 carries an agitator 6 fitted with brushes 7 sweeping over the inner surface of the hopper which has openings 13 leading to an annular channel 17 closed at the bottom by a ring 14. The spindle 4 is rotated by a, cord 9 whose ends are secured to a spindle 10 operated by a hand lever 12, the movement of the spindle being communicated to the ring 14 through an arm 16 and pin 15. A number of shoots 19 each containing a single row of eyelet fasteners lead to openings 19a in a spring-pressed guide-block 18 near the outer edge of which a serrated perforating blade 28 is secured to the base 3. The openings 19a are located above lower dies 21 secured to the base plate, the co-operating upper dies 22 being mounted on a block 23 carried by pivoted lever arms 24 and normally held by springs against an eccentric portion 10a on the spindle 10. A rest-plate 29 to receive the papers is attached to the block 23. The delivery of the eyelets to the dies is controlled by means of pins 30, 31 projecting into the shoots 19 and operated by a rocking plate 33 on a spindle 34, a spring 36 tending normally to rotate the spindle, 34 and swing the plate away from the position shown in Fig. 1. The spindle 34 is held against the spring pressure by a pawl 37 mounted on a shaft 38 and engaging a disc 39, the pawl being disengaged at the required time by an arm 40 on the shaft 10 which coacts with a projection 41. The machine shown is provided with three shoots for the simultaneous delivery of three eyelets to the dies but a shutter 43, Fig. 5. extending over the shoots may be located so as to close the central shoot or the two side shoots or to close all the shoots as required, the shutter positions being determined by a ball 49 engaging in numbered recesses 48. In operation, the lever 12 is first swung backwards and forwards to feed the eyelets into the shoots and the shutter is adjusted according to the number of fastenings required. The papers are then placed on the rest 29 and the hand lever 12 is swung from the rear to the front of the machine. This movement first withdraws the pins 31 and pushes forward the pins 30, thus allowing the lowermost. eyelets to pass to the dies. Further movement then causes the eccentric portion 10a to bring down the upper die, thus clinching the eyelets and causing the blade 28 to perforate the edges of the papers. During the latter part of the forward movement the plate 33 is returned by screws 51 and the pawl 37 re-engages the disc 39. The handle 12 is then returned, thus allowing the springs 26 to raise the upper die-block and resetting the trip arm 40.