Patent GB-135988-A (GB)
Title: Improvements in and relating to Machines for Capping or Sealing Packages or Containers.
Filed: 1918-12-23
Abstract: 135,988. Marks, E. C. R., (Anchor Cap & Closure Corporation). Dec. 23, 1918. Capsules and the like, applying. - Apparatus for capping or sealing containers in vacuo comprises a sealing-chamber having an opening at the side closable by a door operated by mechanism, with devices for exhausting the air from the chamber when the door is closed, and power-driven sealing-devices rendered operative when a predetermined vacuum has been formed in the chamber. The door 15, Fig. 1, seats against an inclined face on the side of the sealing-chamber 35 and is carried by links 14 on a shaft 9 operated through links 6, 7, 8 from a treadle 1. A cushioning-device consisting of a pair of telescoping members 20, 21 provided with air vents takes the shock when the door opens. A rotary valve 32 in the exhaust pipe 34 is operated by a link 31 from a lever 29 which is loose on the shaft 9 and connected by a slotted rod 28 to an arm 27 on the pivot 2 of the treadle 1. A cylinder 36 in the pipe 34 between the valve 32 and the chamber 35 is open at one end and contains a spring-pressed piston 37, Fig. 9, which serves as a valve to close the pipe 34 and simultaneously or immediately thereafter to vent the chamber 35. The piston-rod 38 is connected by a link 42 with a lever 44 provided on its end with a dog-face 48 which normally lies within a groove 49, Fig. 12, of a member 50 on the shaft 51 to engage a notch in a plunger 54. When the valve 32 is opened, the piston 37 moves rearwardly and disengages the dog 48 from the plunger 54, which is then pressed by a spring 57 into engagement with a pin 56 on a wheel 55 driven from the main shaft 58. The table 81. Fig. 15, which receives the container 117 to be sealed is carried by a rod 75 adjustable in a tubular member 74 which is embraced by the bifurcated arm 69 of a lever operated by a cam 61 on the shaft 51. The removable table has pins 82 for pisitioning the container, and a bar 84 prevents the table from rotating upon its carrying-pin 80. The beadforming jaws 92, Fig. 17, guided by a shelf 94 and an adjustable bar 95, are reciprocated by levers 87 operated by cams 85 on the shaft 51. The sealing-chuck 114, Fig. 18, is carried by a plunger 111 operated through a lever 102, adjustable spring connexion 105, and lever 98 from a cam 97 on the shaft 51. A loose pin 115 carried by the plunger 111 rests upon the cap 116 prior to the sealing operation. In operation, the treadle 1 is depressed so as to close the door 15 and open the valve 32. When a predetermined vacuum has been created in the chamber 35, the piston 37 disengages the dog 48 from the plunger 54, and the shaft 51 is rotated. The table 81 is then raised by the cam 61, and the anvil jaws 92 operated by the cams 85, after which the chuck 114 descends, and a bead 118 thereon engages the upper end of the cap 116 and forces it into the forming-ring of the jaws 92, thereby forming the sealing-bead 120 which forces the gasket 121 tightly against the container. Prior to the completion of the operations, the cam 47 operates the piston 37 and closes the air valve 32.