| 摘要 |
<p>1,153,027. Bottling. MECAPLAST S.A. 14 Sept., 1967 [22 Sept., 1966], No. 41941/67. Heading B8T. [Also in Division B5] A nozzle 1 for use in blow-extruding bottles and filling them under sterile conditions with liquid, e.g. milk, comprises inner and intermediate coaxial pipes 10, 9, Fig. 3, which are fixed together and define passages 13, 14 connected respectively to a source of compressed air and to suction, the two pipes 10, 9 being axially movable within an outer large pipe 1 connected to a source of liquid so as to close and open a valve 11, 12 formed by the pipe, &c. ends. The inner pipes 10, &c. are biased upwards to the valve-closed position by a spring 8, Fig. 6. A fine mesh grid, &c. 16, Fig. 3, across the passage 14, prevents the collection of drops on the nozzle 1. In use, a mould 41, Fig. 6, mounted on an endless or circular track together with a frame 37, receives an extruded charge. A fluid-pressure servo 42 acts through linkwork 43, &c. to slide the nozzle 1 down through a rectilinearmotion bearing 25 into the mould 41. Compressed air is introduced through the passage 13 of the nozzle 1 to inflate the extruded charge. The air pressure is cut-off, and suction applied through the passage 14. A fluid-pressure servo 45 is energized to act through linkwork 46, &c. against the bias of the spring 8 and open the valve 11, 12. The bottle is thus filled with liquid and simultaneously cooled, and froth is drawn off through the suction passage 14. The servo 45 operates to close the valve 11, 12, and the servo 42 raises the nozzle 1 out of the bottle. A fluid-pressure servo 32 then draws the nozzle back horizontally and positions it above a cleaning cup 21, into which it is lowered by the servo 42. In the cleaning cup 21, the nozzle 1 is dried by jets of sterile air, &c. As a modification, the nozzle 1 may be so mounted as to effect a rotary motion about a vertical axis, instead of the rectilinear motion described.</p> |
