Patent GB-191317089-A (GB)
Title: Improvements in or relating to Compressing Machines applicable for use in connection with the Manufacture of Boots and Shoes.
Inventor: WADE HAROLD
IPC: A43D35/00
Filed: 1913-07-25
Granted: 1914-07-27
Abstract: 17,089. Wade, H., [United Shoe Machinery Co.]. July 25. Sole blanks, machines for.-A compressing- machine, more particularly applicable for compressing boot and shoe parts and exemplified as a sole pressing machine, has the bottom of the compressing-mould formed by an automatically-operated plate 48, Fig. 5, which is moved upwards to eject a compressed sole-blank and is returned to a position below the top of the mould before a new blank is fed thereto. The blank is delivered to the mould with its front edge lower than its rear edge so that the front edge is engaged by a wall of the mould and positioned thereby. The sides of the mould are formed by dies 44, 46 carried by slides 34, 36 reciprocated by adjustable link connexions 38, 40 to the cross-head. The plate 48 rests upon two supporting-members 70, Fig. 4, each of which is provided with a stem 72, which rests on a bar 56 passing through a recess in the cross-head, and a stem 74 which enters a hole in the cross-head. The bar 56 is carried by rocker arms, one of which 60 is fixed to a rock shaft 64 mounted on a bracket carried by the cross-head. At the outer end of this rock-shaft are three radially projecting arms 78, 80, 82. A lug 84 projects laterally from the end of the arm 82, and has its upper and lower faces bevelled off. This lug engages a latch 90 pivoted at 92 upon an angle-plate 93 adjustably mounted upon a bracket 94 adjustably secured to the frame of the machine. A spring plunger 96 tends to hold the latch against a stop 98. The arm 78 is adapted to engage a screw stop 100 when the plate 48, by the movement of the rock-shaft 64, has been allowed to fall to its lowest position as shown in Fig. 4. As the cross-head rises, the bevelled upper face of the lug 84 engages the latch 90 and pushes it aside until the end of the latch slips below the lug, the side dies 44, 46 close in on the blank, compressing it laterally, and finally the blank is compressed vertically between the plate 48 and the stationary upper die, which is provided with means for adjusting its height. As the cross-head descends, the side dies are retracted and the lug 84 strikes the upper end of the latch 90, causing the rock-shaft 64 to rotate to swing the links 60 thus lifting the bar 56 and forcing upwards the bottom plate 48. The upper limit of the movement of the plate is adjustable by varying the position of the angle-plate 93. While in its upper position, the compressed blank is pushed off by the blank-feeding devices and immediately afterwards the lug 84 slips below the latch allowing the plate 48 to fall to the bottom of the mould. The plate may be timed to fall after only the greater part of the compressed blank has been pushed clear of the plate. The fresh blank is then inserted by the feeding-devices. The arm 80 permits the plate 48 to be lifted by hand whenever this is desirable. The blank-feeding devices are shown in Figs. 1, 5, and 7. The feed-carriage 120 is reciprocated on a bracket from the cross-head by racks 122 meshing with gear-wheels 128 oscillated by a gear segment 130 upon the outer end of a lever 132 carrying a cam-roll 136 which travels in a path in a cam 140 secured to the lower toggle-link 26 of the crosshead. A pair of gripper arms 142 are pivoted at 144 to the feed carriage and carry at their free ends extensions 146 upon which are adjustably mounted fingers 148 to grip the sole in advance of its widest part. A rear gauge 158 is mounted upon a rack bar 160 which may be set by a hand-operated pinion for any desired size of sole. The rear part of the blank is also gripped by a pair of fingers 222 geared together and operated by a connexion 224 with a block 226 adjustably mounted on one of the extensions 146. Pushers 186, Fig. 5, for pushing a compressed blank off the plate 48 are pivotally mounted on the ends of the extensions 146. To prevent engagement of an uncompressed blank by the pushers as the feed-carriage is retracted, the pushers are provided with arms 192 adapted to engage stops 194 towards the end of the feeding movement of the carriage, thus causing the pushers 186 to be widely separated from each other. Springs on the pivots maintain the pushers in this position until, by the retraction of the carriage, the arms 192 are engaged by stops 190 thus causing the pushers to be closed again. The arms 142 which are connected by links and gearing 202, 204, Fig. 7, are moved towards and from each other to grip or to release a blank by a lever 196 mounted on the carriage and provided with a cam-roll 210 adapted to engage cams arranged on the machine frame where they will be engaged towards the inward and outward limits of travel of the carriage. In intermediate positions, a spring 206 acts on the lever 196 and causes the arms 142 to be pressed towards each other thus gripping a sole-blank as it is carried towards the mould. As the fingers 148 are farther from the pivots 144 than the fingers 222, the sole is released at the forward end when the cam-roll 210 engages the cam towards the end of the feeding movement before the heel end. By this arrangement, the forward end of the sole is pushed against the sides of the mould, ensuring its lying within the mould.