Dispensing – Combined
Patent
1976-01-15
1976-08-17
Knowles, Allen N.
Dispensing
Combined
B67D 506
Patent
active
039749452
ABSTRACT:
An aerosol dispensing system having an outer container, compressible inner container means positioned within the outer container, and means to compress the inner container means which are positioned between the inner container means and the outer container. A spray head and valve assembly are connected to the inner container means such that movement of the valve assembly to an opened position permits material within the inner container means to be expelled through the spray head in the form of a finely divided aerosol spray.
The material within the inner container means includes a major amount of a finely divided powder product in admixture with a neutral propellant and a minor amount of an amorphous silica. The neutral propellant is capable of being adsorbed by the amorphous silica and the neutral propellant is present in amounts sufficient to form a substantially homogeneous wet-paste slurry or a substantially homogeneous liquid with the finely divided powder product and the amorphous silica. On opening of the valve assembly during discharge of product from the inner container means, the neutral propellant is at least partially vaporized during passage of the finely divided powder product and neutral propellant through the spray head with the vaporization of the neutral propellant generating a sufficient velocity within the spray head and valve assembly to form a finely divided aerosol spray composed of the finely divided powder product.
REFERENCES:
patent: 1608155 (1926-11-01), Barnebey
patent: 3402665 (1968-09-01), Torpley, Jr. et al.
Burger Norman D.
Knowles Allen N.
Lane Hadd
Mardesich Nicholas
Smyth George F.
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