Patent GB-229225-A (GB)
Title: Improvements in machines for forming and inserting staples and the like made from strip metal
IPC: B27F7/21
Filed: 1924-10-29
Abstract: 229,225. Rolf, Gotz, & Co., and Gotz, A. Oct. 29, 1924. Machines using strip metal. - A stapling machine of the kind in which rhombic portions are cut from strip metal and bent into staple form is provided with means for withdrawing the anvil over which the staple is bent from the path of the driver, for varying the length of the staple blank, and for varying the inclination at which the strip metal is fed to the cutters. All the operating parts of the machine are, in known manner, moved by means of a sector 8, Fig. 1, having a number of cam slots and operated by a treadle. Metal strip 2 is fed intermittently by a feeding device 3 comprising a pawl and ratchet mechanism operated by a rod 4 and cam slot 7. A member 10 pivoted to the sector 8 houses a sleeve 20, Fig. 2, which is movable vertically by a cam slot 26 and carries a cutter 21 which cooperates with a fixed cutter 22, the cutters being disposed at an 'inclination to the strip 2. A driver 31 is mounted on a punch 27 which is movable within the sleeve 20 by a cam slot 30. The strip 2 is fed into position over an anvil 32 which is mounted on the bent end of a lever 34 extending through a slot 35 in the member 10. The lever 34, which is pressed inwardly by a spring 37, is pivoted to a slide 38 guided in the member 10 and normally held upwardly by a bracket 40, on the punch 27, which extends through a slot 41 in the member 10 and engages the lower end of the slide. A stop 44 engages in a slot in the slide 38. In operation, the sleeve 20 descends to sever a staple blank and bend it over the anvil 32. The punch 27 then descends, carrying with it the slide 38 and lever 34 until the stop 44 engages the upper end of the slot in the slide 38 when the bracket 40 engages a cam surface 45 on the lever 34 and swings the latter laterally to withdraw the anvil through the slot 35. The driver 31 then drives the staple through the throat 33 into work supported on a table C. The strip-feeding mechanism 3 is adjustable to suit different lengths of staple and different thicknesses of strip. A sleeve 48, Fig. 13, rotatable on a fixed spindle 6 carries one feed roller 61 and also a toothed ratchet 51 which is engaged by a pawl 50, Fig. 12, carried by a two-armed lever 49 rotatable about the sleeve 48. The lever 49 is oscillated by the rod 4 in order to rotate the roller 61 to feed the strip. The pivot connecting the rod 4 to the lever 49 is adjustable along the lever 'by a screw and nut to vary the length of feed, the degree of adjustment being indicated by a scale 59. The roller 61 co-operates with a roller 62 on a sleeve 64 rotatable on a spindle 63, a pinion 65 on the sleeve 64 meshing with a pinion 66 on the sleeve 48. The spindle 63 is adjustable relatively to the spindle 6 in guides 69 to allow for varying thicknesses of strip by means of a screw 70, the amount of adjustment being indicated by means of a pointer 78 and a scale. In order to vary the length of the points of the staple the inclination at which the strip is fed to the cutters is varied. To this end, the spool carrier 1, Fig. 22, is adjustable on a bracket 92 by means of slots 90 curved concentrically by the cutters. The spool carrier is adjustable to accommodate spools of varying widths.