GB1292190A - Machines for perforating paper or the like - Google Patents

Abstract

1292190 Perforating apparatus R LIOUVILLE 21 Dec 1970 [24 Dec 1969 25 June 1970] 60675/70 Heading B4B A stack of sheets of paper F, Fig. 1, is perforated by an apparatus including a table 2 for the stack which has drill carrier plates 5, 6 which are moved together with a line of drills 7 carried by each plate, simultaneously with the rotation of the drills. The axes of the respective lines of drills are interdigitated. As described, the table 2 has four integral columns 3 supporting a jaw 4, which compresses the stack F, and the plates 5, 6. The jaw 4 and plate 5 are controlled by rods 9 and the plate 6 is controlled by rods 14. The rods 9 and 14 are actuated by a lever 16, Fig. 2, and linkwork 18, 19, 21, 23. The drills are rotated by a motor 24, having a very long pinion 25 which drives pinions 26 ... 32, Fig. 3, and having a fly-wheel 36. The drills are very pointed and have a pronounced relief (39) on the flute, Figs. 4 and 5 (not shown). In a second embodiment the sheets are compressed by a jaw 41, Fig. 7, and the upper and lower drills are actuated by motors 45. The sheets are then fed to an apparatus 48, 49 which produces e.g. square holes. The punches 49 and jaw 47 are displaced by cams 51, 52 driven by a motor 50, either continuously or in a vibratory manner. The transfer of sheets from the drilling to the punching station is effected by a transfer table 53, Fig. 8, arranged in the plane of the drill and punch tables, 40, 46, and provided with an edge stop 53<SP>1</SP>. The table 53 has slots 54 for pairs of transporter arms 55 which are integral with a traverse bar 56, Fig. 7, which is in turn actuated by a motor 57 and linkwork 58 ... 62. The linkwork includes a telescopic strut which permits differences of stroke between the traverse bar and the lever 61. The punches for square holes present eight cutting edges 64, Figs. 9 and 10. The punches may include a centring element and a paper extractor.