Method and apparatus for purging a propellant from a filling...

Details Method and apparatus for purging a propellant from a filling... Method and apparatus for purging a propellant from a filling...

2007-11-06

2007-11-06

Pihulic, Dan (Department: 3662)

Fluent material handling, with receiver or receiver coacting mea

Filling or refilling of dispensers

Aerosols

Statutory Invention Registration

active

11177684

ABSTRACT:
A method and apparatus for minimizing propellant emissions during the filling of an aerosol container that has a valve attached thereto and a valve stem extending from the valve. A filling head is disposed in a sealed relationship with a portion of the container so that the valve stem is encased within a recess of the filling head. A pressurized propellant is introduced into the filling head at a sufficient pressure to force the propellant through and around the valve stem and into the container. An incompressible purge medium is introduced into the filling head at a sufficient pressure to force the incompressible purge medium through and around the vale stem, wherein the incompressible purge medium flushes out residual propellant from the filling head and into the container.

REFERENCES:
patent: 4872491 (1989-10-01), Nickason et al.
patent: 6948534 (2005-09-01), Hirz

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