GB692106A - Improvements in or relating to manually or foot operated wire stitching machines - Google Patents

Abstract

692,106. Stapling. VICKERS-ARMSTRONGS, Ltd. Aug. 22, 1951 [Aug. 30, 1950], No. 21437/50. Class 89 (iii). A manually or foot operated stapling machine comprises an oscillatable cam member 20 which is formed with cam peripheries 30, 27 to control the feeding and severing of a staple length of wire, and with cam grooves 21, 22 to control the formation of a staple from a previously severed length of wire and to effect the driving thereof. The wire blank w is moved from the cutting plane Y-Y to the staple forming and driving plane Z-Z by a loop bar 40 operated by a spring 41. As the staple former 7 and driver 8 descend, the driver engages the loop-bar and moves it to the wire feed position in which it is held by a spring-pressed latch-bar 42 which has been held in raised position by a lever 67 engaged by an abutment 72 on the cutter block 65. When the cutter is lowered, the abutment 72 is disengaged from a nose 71 of the lever 67. The latch is restored to its upper position by the driver 8 engaging with a flange 46 thereon. The wire is fed by a spring-pressed pivoted gripper 54 carried by a spring-controlled lever 34 having a cam follower roll 31 engaging the periphery 30. The wire passes through a cutting tube 58 and is severed by a co-operating cutter 64 which is mounted on a block 65 pivoted on a plate 56 and operated by the cam periphery 27. A pin 73 on the block 65 operates to hold a non- return gripper 57 out of engagement with the wire while the cutter 64 is in its upper position. The length of wire fed is determined by an arm 59 on plate 56, which is adjustable by a thumbscrew 61, engaging a projection 60 on the feed lever 34.