Patent GB-628702-A (GB)
Title: Improvements in or relating to machines for applying reinforcements to workpieces
IPC: A43D43/06
Filed: 1947-10-02
Abstract: 628,702. Attaching reinforcement strips to workpieces by adhesives. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation). Oct. 2, 1947, No. 26577. Addition to 579,399. [Class 73]  The machine described in the parent Specification is modified by inclining the worktable forwardly, arranging the transfer mechanism which brings the tape above the workpiece to'tilt into parallelism with the worktable, providing a pump in the adhesive feed from the reservoir to the adhesive receptacle, and providing yielding means in the operating mechanism of the adhesive-applying means. The worktable 24, Fig. 6, is tilted at an agle of 10 degrees to the horizontal for the convenience of the operator, and in order to facilitate the attachment of the reinforcing strip the transfer mechanism 26 is tilted a similar amount as it swings from its picking up position to its fixing position. As shown in Fig. 3, the transfer device 26 is rotatably mounted on a shaft 192 journalled in the arms 252, 254 of a sleeve 256 which rotates on a shaft 258. Freely rotatable on the shaft 258 is a gear 272 which is prevented from rotation by keys 274 and slots on the support for the shaft. In engagement with this gear is a pinion 276 rotatable on a stub shaft 278 fixed to the arm 252, and meshing with this pinion is a gear 280 secured to the shaft 192 of the transfer device. As the sleeve 256 rotates to bring the transfer device from one position to the other, the pinion 276 rolls round gear 272 and rotates gear 280 to tilt the transfer device the requisite amount. In order to allow the transfer device to pick up the tape, both of its side plates are adapted to be moved apart by cams as it comes down to the tape support in a manner similar to that described in the parent Specification for moving one of the plates. The side plates are normally held in the closed position by a U-shaped leaf spring 210. A cutter 20 fixed to the arm 254 of the transfer device, Fig. 6, engages another cutter to sever the tape in the picking up position. The adhesive applicator 18 is attached to a lever 120 which is rotatable on a shaft 138. Also rotatable on this shaft is another lever 136 having a cam follower 140 held in engagement with a cam 142 by a spring 144, the cam being driven from the main drive shaft. Levers 120, 136 each have extensions which are in engagement, and are held together by a spring 152. In the event of the machine being operated before the adhesive is molten, the springs 144, 152 allow the cam 142 to rotate without putting any strain on the applicator. A carton 502, Fig. 7, of solid adhesive is inserted into the reservoir 500 in an inverted position, as in the parent specification, and is heated there by a vertical heater 560. The reservoir 500 is connected to the receptacle 16 by a neck 508 which acts as an overflow device to limit the level of adhesive in the receptacle 16. A lug 512 in the casting of the reservoir is provided with two bores, Fig. 6, one 514, in which a piston 516 slides, being connected by a duct to the reservoir 500. The piston, on reciprocation, pumps adhesive via a duct 528 into the other bore 522. The bore 522 is stepped and opens into a larger bore 520 which is connected to the receptacle 16 by means of ducts 532, 534. A non-return ball valve 526 is seated on the step in the bore. The receptacle 16 is heated by an element 558. The piston is reciprocated by means of a pivoted lever 540 and interconnected gear segments 544, 546, the segment 546 being attached to the lever 120 of the applicator. The springs 152, 144 act also to prevent straining the piston if the machine starts before the adhesive is molten.