Patent GB-468786-A (GB)
Title: Improvements in or relating to fastening inserting machines
IPC: A43D69/04
Filed: 1935-12-11
Abstract: 468,786. Stapling. UNITED SHOE MACHINERY CORPORATION. Dec. 11, 1935, No. 34277. Convention date, Dec. 14, 1934. [Class 89 (iii)] A machine for making and driving fibre staples, for example, for securing the upper of a stickdown shoe to the sole, comprises a pair of awls for forming holes to receive the staple legs, the awls moving in guide passages which are formed in a throat member at a small angle to the driver passage therein, the awl and driver passages intersecting at the work-engaging face of the throat member. A work support is arranged to be raised manually to press the work against the throat member, and thereafter to be raised by power means to maintain a yielding pressure until the staple-driving operation is completed, and has a guideway for two fingers arranged to clench the projecting ends of the staple legs. As shown in a machine generally similar to that described in Specification 17439/05, [Class 89], a driver bar 16 and an awl bar 34 are mounted to slide in guideways which are inclined to one another at an angle of about 9‹. The driver bar, which is raised by a cam 210 and lug 208 to put its actuating spring under tension, carries a driver 18 adapted to operate in a staple-guiding passage 44 in the throat member 42. The awl bar carries a pair of awls 36 which are spaced apart and operate in passages 40 in the member 42. It receives its workpenetrating stroke from a spring 66 which is put under tension' when the awl bar is raised by an arm 52 operated by a suitable cam. Descent of the awl bar is limited and cushioned by a head 76 with fibre washers 77. A work support 82 is carried adjustably by a block 91 adjustable forwardly and rearwardly of the machine on a post 90 arranged to slide vertically in bearings 96. The post is raised, to press the work 78, 79 against the throat 42, by a treadle 84, link 86, and lever 88. When the machine is started by depression of a treadle 92, the post 90 is raised further by the engagement of a toggle link 108 with a collar 98 on the post. The toggle 104, 108 is straightened by a cam of the machine acting through an adjustable, yielding, linkage 128, 124, 120, 118, 112. The link 108 is so arranged that it does not engage the collar 98 if the machine is started before the post 90 has been raised by the treadle 84, and it is held in the position shown by a spring plunger 114. A spring plunger 140 cushions the return stroke of the link 104. The work support 82 is formed with an arcuate guideway 146 for guiding two fingers 148 which, when a staple 73, Fig. 9, has been driven through the work, engage its legs and clench them outwardly. The fingers are rocked by a cam of the machine acting through linkage 149, 154, 160, 166, 168. The fibre material for the staples is fed by mechanism which may be similar to that described in Specification 107,035, [Class 17 (i)], a staple length being cut off and shaped over a withdrawable inside former 192. The staple is guided and supported in the throat passage 44 by a spring-pressed finger 220. Specification 410,112 also is referred to.