Patent GB-798349-A (GB)
Title: Improved combined piercing and threading apparatus
IPC: B31D1/02
Filed: 1956-06-29
Abstract: 798,349. Inserting lengths of thread, hand sewing tools. SCHAERDER. H. June 29, 1956 [July 1, 1955; June 6, 1956]. No. 20279/56. Class 112 [Also in Group XV]. An apparatus for piercing film material and simultaneously passing a thread therethrough comprises a piercing needle B, Fig. 1, with a thread eye 13, and a threaddrawing needle C which is clamped to the piercing needle behind the eye and has a pointed tip 14 projecting into the eye. In apparatus for stringing labels, needles B and C are clamped by a screw 11 in a holder 10 carried by slide 9 non-rotatably on a vertical column 1. A non-rotatable slide 12, located on column 1 below slide 9, carries string-gripping jaws D. A cable 6 interconnects slides 9 and 12 and is connected to a pedal, operation of which is arranged to move the slides towards each other against the bias of a return spring. A table 3, fixed to the column between the slides, is provided with a stop 17 for a label E. A support 7, fixed to the column above slide 9, carries a string-cutting device A. The arrangement is such that when string 16 is passed through eye 13 to leave a short projecting end, a label is placed in position, and the treadle operated, the point 15 of the needle B pierces the label, point 14 carries the string through the label, and the string end enters the opened jaws D which rise to a position immediately below the table. Upon release of the treadle, the initial movement of slide 12 serves to close jaws D, and the string passes freely through eye 13 as the slides move apart. When the slides approach their outermost positions, device A operates to sever the string close to point 15, and jaws D open to release the string end. It is stated that the invention may be in the form of a simple hand-held apparatus which does not comprise a string- gripping or a string-cutting device. The string-gripper comprises a fixed upper jaw 45 carried by a fixed pin 44, and a movable lower jaw carried by a sleeve 47 which is slidable on pin 44 and is spring-biased upwardly. A lug 52, projecting from sleeve 47, engages a fixed bolt 53 near the highest position of slide 12 to open the jaws; and one arm cf a lever 54, pivoted on slide 12, engages a fixed bolt 56 near the lowest position of the slide to engage the other arm with a lug 57 on sleeve 47 for opening the jaws. A double-armed lever 19, pivoted on a bolt 18 fixed in support 7, is biased by a spring 20 to engage a roller 22, carried by one arm of the lever, with a vertical camplate 23 carried by slide 9. To the other arm of the lever is secured a stationary cutting blade 25. The latter is formed with a series of cutting edges, any one of which may be moved to a position for co-operating with a movable blade 27 by turning blade 25 about a pivot bolt 24 and securing the blade in adjusted position by means of a screw 26. Blade 27, which is freely pivoted on bolt 24, and is biased against blade 25 by a spring 28, is connected by a link 31 to a rod 32 slidable in lugs 33 on lever 19. A roller 34, fixed to rod 32, carries a roller 35 and is adapted to be held by a spring-biased pawl 39, pivoted to lever 19, against the bias of a spring 36. When slide 9 approaches its highest position, roller 22 engages a projection on camplate 23, whereby lever 19 is swung to bring blades 25, 27 adjacent the string, and a stud 41, carried by a vertical camplate 38 fixed to slide 9, trips pawl 39 to release collar 34, when blade 27 is operated to sever the string. At the beginning of the downward movement of slide 9, lever 19 returns to its original position, and near the end of said downward movement roller 35 rides over a projection on camplate 38 for re-latching collar 34 with pawl 39. The ends of the portion 16a of string passed through the label are gripped by respective pairs of jaws 82, 83 mounted at the outer ends of opposed arms 75, 76 which are pivoted about a common horizontal axis. Said arms then move laterally to draw the string and label off table 3, and finally pivot towards each other to facilitate the removal of the string from the jaws. A horizontal tube 60, fixed at one end to table 3, and formed with opposed longitudinal slots 61, carries a pair of sleeves 63 and 67. Sleeve 63 is slidably but non-rotatably connected to tube 60 by a transverse pin 62. Sleeve 67 is so coupled to sleeve 63 that it moves longitudinally with the latter but is also rotatable on tube 60. Arm 76 has a hub 76a which is pivotally mounted on sleeve 67 and is formed with gear teeth 76b. A hub portion of arm 75 and a gear pinion 78 are fixed to sleeve 67 on opposite sides of hub 76a. Arms 75 and 76 are biased apart by means of a spring 79. A spring 71 is connected between a member 70, anchored to pin 62 and a pin 72 fixed in the end of tube 60. A cable 73 which runs over a pulley 74 carried by table 3, is connected between member 70 and an arm 12a projecting from slide 12. Thereby, sleeves 63, 67. together with arms 75, 76 move outwardly when sleeve 12 rises, and inwardly when sleeve 12 falls A horizontal square shaft 86 is journalled on table 3 and carries a gear wheel 91 which is journalled in ball bearings 92 mounted in a split casing 93, 94, the lower part 93 of which is carried by one end of an arm 95, the other end of which is formed as a sleeve 95a fixed to sleeve 63. A rack 96, slidable in part 63 and engaged with gear 91, is connected by a transverse member 97 to racks 98, 99 which are respectively engaged with gears 78 and 76b. An adjustable bracket 89, 90, fixed to slide 9, carries a roller 88 adapted to engage an ]arm 87, projecting laterally from shaft 86, near the end of the downward movement of slide 9, whereby arms 75 and 76 are swunk towards each other. Shafts 100, journalled on arms 75, 76, carry at their outer ends arms 101 provided with screws 102 which are adapted, on rotation of shafts 100, to press jaws 83 against jaws 82. Each inner end of a shaft 100 carries a twoarmed member, one arm 103a of which abuts a screw 107, carried by table 3, near the end of the inward movement of arms 75, 76 to turn shafts 100 for applying pressure to jaws 83. The other arms 103b carries a ball catch 104 which engages a depressiond to retain said shafts in the pressure-applying position. The jaws remain closed during their outward movement, ond for most of their inward movement until a rib 103c, provided on each arm 103b, engages a spring-biased pawl 108 for turning shafts 100 to a pressurereleasing position. During the outward movement of the arms 75, 76 pawls 108 are merely displaced aside by the ribs 103c.