Patent GB-496722-A (GB)
Title: Improvements in and relating to sealing machines for bottles and like containers
IPC: B67B5/05
Filed: 1937-06-01
Abstract: 496,722. Closuring bottles &c. TRIGGS, W. W. (Plastic Seal Corporation) June 1. 1937, No. 15237. [Class 125 (ii)] For sealing bottles, &c., a ribbon of viscous sealing material is applied to the joint between the closure and the bottle by extrusion from a nozzle which corresponds in contour with the area to which the sealing material is to be applied. The bottle is carried on a rotating table 28, Figs. 1 and 3, driven from the main shaft through bevel gearing and controlled so that for each actuation of the pedal 19 the clutch 18 permits the shaft 17 to make one complete revolution corresponding to two revolutions of the table. A semi-cylindrical fixture 38, Fig. 3, positions the bottle on the table, and for centring there is provided a cup - shaped member 45, Fig. 1, depressed to engage the rim of the closure ; after the bottle is centred, an inner member 52 is lowered to engage the upper face of the closure, and thereafter the member 45 is raised; the members 45, 52 are actuated by cam plates on a shaft 50. The nozzle 36, Fig. 3, from which the sealing material is extruded, is swung into and out of position by means of a pair of cams 101, Figs. 1 and 3, on the shaft, the cams acting through link mechanism 99, Fig. 3, and when in position a supply of sealing material is admitting to the nozzle through a communicating passage 90, Fig. 8, in the spigot 89 on which the nozzle-carrying member 87 rotates ; at the same time, through a valve 72, Figs. 3 and 7, which is actuated by a second pair of cams 81 on the shaft 50 by link mechanism 80, the nozzle is put into communication with the pump 67, Fig. 3, supplying the sealing material, and a valve 73, Figs. 3 and 7, in the byepass of the pump is closed. The cams 81, 101, are arranged so that sealing material is applied to the bottle for more than a complete revolution, the ends of the ribbon accordingly overlapping ; thereafter the valves are closed and the nozzle returned to its original position in contact with a rotating brush 93, Fig. 3, and the part 52, Fig. 1, is raised to release the bottle. The nozzle 36 is formed of two sections 111, Fig. 8, clamped together and separated by shims so that the width of the discharge passage may be adjusted ; longitudinal channels 113 provide for the supply of sealing material, the amount passing being capable of control by adjusting the position of screws 117 which project into the channels. Sealing material is drawn from a reservoir 65, Fig. 3, by a pump 67 preferably of the gear wheel type and delivered through a filter 71a, Fig. 7, to the valve 72, a passage 74 controlled by the valve 73, which however is furnished with a small port 73a, returning material to the reservoir when the valve 72 is closed ; initial pressure in the system for starting the ribbon is secured by suitable adjustment of a plug 74a in the byepass. In a modified arrangement for applying the ribbon, the nozzle 47, Fig. 13, is arranged to rotate about the bottle, being carried by a rotating part 131. After the ribbon of sealing material has been applied, raising of the part 52 to release the bottle, actuates a rod 155 carrying a dog 159 which then holds stationary a gear wheel 152 in engagement with a wheel attached to the lower part of the arm 141 carrying the nozzle. Further rotation of the part 131 then causes the nozzle to move away from the bottle, to sweep past a rotating brush and to return eventually to its original position ready for the next cycle of operations, when the dog 159 is released.