Patent GB-837701-A (GB)
Title: Improvements in or relating to the manufacture of points of ball point pens
IPC: B21D53/76
Filed: 1956-06-21
Abstract: 837,701. Making ball point pens. BERTOGLIO, G. June 21, 1956 [Dec. 30, 1955; April 25, 1956], No. 19199/56. Class 83 (2). Apparatus for forming and piercing the points 3, Fig. 2, of ball point pens comprises a support 1, Fig. 9, movable stepwise into successive positions and carrying at spaced intervals a series of points to be pierced, and a chuck 7, 9, 10 disposed at each of said positions and carrying a tool 5, Fig. 2, adapted to carry out an operation on the point, each chuck having a centring support 4, Fig. 10, adapted to centre the chuck relatively to the point 3 before the respective operation is performed and. micrometer means 38, 39, Fig. 10, for limiting the movement of the tool. Preformed points, Fig. 1 (not shown) are supported in holes 2 in a rotating carrier 1 which is rotated in steps by a pawl 20, Fig. 9. engaging teeth 21. in the periphery of the carrier. The pawl is carried by a rod 19 actuated by a fluid pressure motor 17 supplied with pressure oil through an electromagnetically operated valve 18 by a pump 16 drawing from a reservoir 15. Movement of the rod 19 to the right causes it to open a valve 22 thus allowing pressure oil to pass through pipe 23 into cylinder 24 which actuates a key rod 25 for locking the carrier 1. The pressure oil then passes through motor 24 and pipe 26 into a distributer 27, Fig. 10, which controls the: supply to the chucks. The distributer comprises a spring- biased piston valve 49 having a groove 49<SP>1</SP> through which the oil passes initially into conduits 45, 28 and cylinder 29 where it actuates a spring-loaded piston 30 connected by a link 31 to an actuating plate 32 for the chuck. The latter comprises a rotating shaft 40 carrying the tool 5 and driven by an alternating-current motor. The shaft 40 is mounted within a sleeve 37 movable, preferably on ball bearings 56, Fig. 11 (not shown), within an outer sleeve 33 which carries the centring support 4. Sleeve 37 carries at its upper end a ring 36 having a pin 35 engaged within a notch of the actuating plate 32: the outer sleeve 33 carries a pin 43, operating within a slot 44 of the actuating plate 32. The inner and outer sleeves are biased by a spring 34. Actuation of piston 30 first causes both sleeves to be lowered until the support 4 engages the point 3. This causes an increase in the pressure within cylinder 29 and conduits 28, 45, which acts through conduit 46 on the right-hand end of piston valve 49 thus moving the latter to the left against its adjustable biasing spring 47. Groove 49<SP>1</SP> thus establishes communication between inlet conduit 26 and conduit 50 which contains an adjustable throttle valve 51. The oil passes this throttle valve and enters conduit 52 communicating with conduit 28 and acts further on piston 30 to cause plate 32 to lower the inner chuck sleeve 37 and the rotating shaft 40 carrying the tool 5 which thus operates on the point 3. When the tool reaches the limit of its downward movement determined by micrometer ring 38, carried by sleeve 37, engaging top of sleeve 33, a further increase in pressure in conduit 28 is produced which operates a piston 53 controlling electric contacts 54 for the valve 18, Fig. 9, which is opened to by-pass the oil back to the reservoir. At the first chuck station, Fig. 2, the tool 5 chamfers the end of the point; at the next two stations, Figs. 3, 4 (not shown), the point is pierced and counter-bored;. at the next station, Fig. 5 (not shown), longitudinal ink grooves are formed in the bore; at the next station, Fig. 6 (not shown), the bore is trued, at the next station, Fig. 7 (not shown), the tip of the point is levelled, and at the final station, Fig. 8, the hole is smoothed to remove any burrs. The movable support 1 may comprise a belt or chain having rectilineal movement instead of rotation.