Patent GB-618096-A (GB)
Title: Glass blowing method and apparatus
IPC: C03B9/02
Filed: 1946-10-18
Abstract: 618,096. Blowing. KENT - OWENS MACHINE CO. Oct. 18, 1946, No. 31074. Convention date, Oct. 18, 1945. [Class 56] A semi-automatic glass-blowing machine has a holder to receive a blowpipe 53, a marvering device 54, a means 52 for swinging the holder to position the blowpipe vertically for blowing, a mould 56 with closing means, means to introduce air into the blowpipe, and separate controls to independently adjust the duration of marvering, swinging, and final blowing, while the machine is operating. Swinging. The machine frame 51 on base 50 has a casing 60 with rollers 61 in which the drum 52 is rotated by teeth 63 meshing with the gear 65 on shaft 64. Rod 70 of cylinder 71 slides the rack 68 which meshes with a second gear on 64 and hence rotates the gear 65 and the drum, while screw 72 limits the movement of rack 68 and therefore the swinging of the drum. Hollow shaft 78 in bracket 75 on the drum connects to an air pipe 83 and blow-pipe 53, and is rotated with the blow-pipe by the gears 100, 101, 103, 104, pulley 107 and belt 113 from the motor 110. Arm 90 on the drum has an adjustable bracket which spring grips the blow-pipe and controls the switch actuating plunger. Marvering. The disc 54 shaped at 120 and mounted on shaft 121 in the block 122 is rotated through gear 123, worm 124 and pulley 126 by a motor and is adjustable with block 122 in a direction parallel to the shaft 121, with plate 134 in transverse direction by wheel 144, and with plate 139 is pivoted to plate 145. The plate 145 on the end 155 of the arm 147 is adjusted for height by the wheel 154 which causes the arm 147 to pivot about 148. The marver is driven by cylinder 158 through a rod and sliding rack 161, adjustable at 163, so that the plate 139 oscillates about the fixed plate 145, or by including gear 168, rack 169 which is connected by bolt 170 to plate 145, and links so that plate 145 and the entire marver is moved rectilinearly. Moulding. The mould support 185 on trunnions 186 is connected by the link 187 either to the drum so that mould is cooled in the tank 188, or to the casing at 187<SP>1</SP>, and carries a vertically adjustable plate 189 with a hinge pin 190. A slide 195 opens or closes the mould when moved by the piston head 199 of cylinder 197, and carries a cross-piece 218 with pins 219 on which are vertically adjustable mould closing links 202 with spring 203. The mould bottom 205 is adjustable at 207 on a support 206 on the rocker-shaft 207. Take-out. The shaft 220 connected at its lower end to lever 210 is rotated by teeth 225 slidable through the pinion 226 which meshes with a rack 228 driven. by the cylinder 231, and carries arms 232 each with a cylinder 234 and rod 235, to project the jaw and the pivoted jaw 237 about the blow-pipe, and a return spring 241. The shaft operates switches 245 and 246 of the timing device. The cylinder 215 rocks the shaft 207 and thereby, through the ports 206, 210, causes the mould and takeout to be raised or lowered. Cooling. The cooling box 55 is divided into several longitudinal compartments, each with an aperture 256 through which air, controlled at valves 259, is blown as the gather passes from the marvering to the blowing position. Blowing. The reversible valve 277 moves the piston 276 in cylinder 275, and by the connecting rod 278 also moves the piston 279 in cylinder 280, which has a second piston 281 on a hollow bolt 282 and adjustable at 284. Air enters through valves 274, 273, and by the double pumping action of the cylinder 280 and action of valves 274<SP>1</SP>, 273<SP>1</SP> is forced through pipes 287 and 287<SP>1</SP> in puffs to the pipe 83 and hence to the blow-pipe. When blowing is completed, the mould opens, causing the mould and take-out to be lowered, thus removing the blow-pipe from bracket 75, when it is swung clear, by rotation of the take-out, and the glass further cooled by the air jet 351. The apparatus then returns for the insertion by hand of another blow-pipe and gather. The sequence of operations, marvering, swinging, cooling, blowing in a mould, removing and final cooling is controlled by an interconnected system of cylinders, adjustable valves and time switches, and by means of the latter the duration of the various operations can be adjusted while the machine is in operation.