Back to results
US 4,301,119 AGranted
Apparatus and method for dispensing foamable compositions
AssigneeNordson Corporation
InventorsWalter H. Cobbs, Jr., William R. Rehman
Life of this patent
Estimating the term…
Abstract
Pressure vessels are disclosed for containing a foamable mixture of liquid and a blowing agent for incrementally or continuously dispensing a foam of constant foam-volume ratio. Liquid compositions having coating or polymeric solids are capable of being foamed and dispensed with the apparatus. The method and apparatus are especially advantageous in dispensing foamed coatings, paints or adhesives with superior control.
Claims11
Apparatus for dispensing a foamable composition comprising
- a vessel containing a foamable mixture of a liquid and a blowing agent under pressure, said vessel having means defining a vapor space above said liquid and a dispensing outlet, and
- a pressure container holding a blowing agent under pressure and having means defining a vapor space connected to the vapor space means of said vessel, said pressure container haing means for maintaining a substantially constant composition of said blowing agent in said vapor space of said vessel under a vapor pressure at least equal to the vapor pressure of said mixture for dispensing a foam of constant foam-volume ratio, said means for maintaining including heating means.
The apparatus of claim 11 further comprising means for heating said foamable mixture in said vessel.
Dependencies are inferred from the claim text.