Patent GB-185499-A (GB)
Title: Improvements in or relating to machines for pressing shoe soles on to shoes
IPC: A43D25/06
Filed: 1921-06-03
Abstract: 185,499. British United Shoe Machinery Co., Ltd., (United Shoe Machinery Corporation). June 3, 1921. Presses, diaphragm; working valves; presses, relief and safety devices for. - A machine for pressing soles, particularly rubber soles, to shoes comprises power-operated means first to press a shoe and sole against a flexible diaphragm and then to wrap the diaphragm about the bottom and side faces of the shoe. The diaphragm 17 is clamped over a pressure box 25 having filling- plugs 115 by a wearing-plate 113 and a rim 34 having guide-lugs 35 for a curved sole-locating plate 37 formed with right and left sole openings 39 and with last-guiding lugs 41 and adjustable spring-locked solo gauges 132. Recesses 43 in the plate 37 coact with a spring-pressed bolt 45 operable by a cam-lever 51 to hold said plate in adjusted position. The diaphragm is normally held close to the plate 37 by a spring-pressed plate 21. Fig. 2, and a block 57 within the box 25 limits downwards movement of the heel end of the last and shoe. The upper portion of the machine frame 27 carries two arms 59 each fcrmed with a slot 70, the upper part of which is rearwardly inclined. Mounted in the upper portion is pin 63 on which pivots a casting comprising a pipe 69 and communicating hollow arm 67 on which slides a cylindrical member 71 provided with rolls 73 engaging the slots 70. The extensible arm 67, 71 is normally held shortened by a spring 75. The member 71 has a web 79 formed with guideways 85 for brackets 87 carrying the toe and heel jack posts 81, 83. The upper ends of the brackets 87 can be expanded by u screw and lug 89 to bind in the guideway 85, and the jack posts are screwed into the brackets. The heel post carries a swivelled metal contactmember 97, and the toe post a fluid-filled pad 99 secured thereto by a nipple 101 and elongated nut 105. Water under pressure is supplied first to the shoe support by the pipes 123 and 69, and to the pressure box by a pipe 121. The water system, Fig. 6, includes a reservoir 145, a cylinder 147 in which reciprocates a piston 151, and three valves. The jack valve 153 is located at the bottom of a chamber 155 which communicates with the pipe 123 and with the cylinder 147 by a port 157. This valve is held downwardly by a spring 159, but is held raised when the machine is at rest by a rod 158, so that when the piston begins to rise water is forced into the pipe 123. The pressure-box valve 161 is located in a port 167, held downwardly by a spring 165 stronger than the spring 159, and normally closed when the machine is at rest by a rod 209. The reservoir valve 169 controlling the port 173 from the chamber 171 to the reservoir 145 is held downwardly by a spring 177 stronger than the spring 161 and is'opened and closed by a rod 203 in unison with the valve 153. The reservoir is open to atmospheric pressure, and the pressure box 25, pipe 121 and cylinder above the piston are maintained full of water. A shaft 189 rotatably mounted in the frame carries a crank pin 191, between cams 195, 197, connected by a rod 193 to the piston. Mounted above the shaft 189 is a rod on which are fulcrumed two hubs 196, 198. The hub 196 has two rigid arms 199, connected to the jack and reservoir valve rods, one of which carries a roll 201 in engagement with the cam 195. The hub 198 has an arm 205 connected to the pressure box valve and carrying a roll 207 coacting with the cam 197. A worm wheel 211 loosely mounted on the shaft 189 meshes with a continuously driven worm 213 and is provided with a one-revolution clutch 217. In operation, a sole and lasted shoe are placed on the diaphragm 17 after adjustment of the plate 37 and sole gauge 132. The clutch is then thrown in by a treadle, causing the piston to rise, forcing water past the open valve 153 to the jack, which is depressed, moving the shoe to the position shown in Fig. 10. Continued rotation of the shaft closes the reservoir and jack valve and opens the pressure-box valve 161, so that water is forced into the box 25, when the diaphragm takes the position shown in Fig. 11, until the pressure is sufficient to overcome the spring 177 and open the valve 169. When the piston descends the reservoir and jack valves are opened, first relieving the pressure in the box 25, and then in the jack, which is raised by the spring 75. Specification 6096/99, [Class 17, Boots &c.], is referred to.