GB931683A - Improvements in or relating to methods of and means for purging, filling and closingaerosol containers - Google Patents

Abstract

931,683. Filling aerosol containers. AERATOM A.G. April 21, 1961 [April 21, 1960], No. 14453/61. Class 125(2). Excess propellant which collects above the neck of an aerosol container during filling is supplied to a purging nozzle 26 and fed into a following container to purge it of air. A container 22, containing the active substance to be dispensed by the propellant, is positioned beneath the filling head 18 in which a valve device 23, Fig. 3, for closing the top of the container is held on the end of a cylinder 17, e.g. by suction or by a magnet. The head 18 is lowered by a pneumatic piston 3 to seal against the container and a valve 20 is then opened to supply a metered amount of propellant through passage 20a and valve 23 into the container. A piston 13 is then driven downwards to place the valve 23 within the container neck, against which it is secured by a crimping collet 16 which is expanded by a stem 11 actuated by a pneumatic piston 8. The valve 20 is then closed and valve 21 opened to allow the excess propellant which collects in the space between the head 18 and the neck 22d of container 22 to evaporate and pass through passage 24 and nozzle 26 to purge a following container 22a, the nozzle being raised and lowered by a pneumatic piston 29. The active substance is metered by a pump 33 and fed through a passage 42 into the container at the purging station.