Abstract: Apparatus for forming a composite article including an inflatable center adapted to retain a predetermined shape covered with a covering of molded material and preferably an inflatable composite article such as a game ball with a covering of more uniform thickness. Surfaces of complementary elements of a mold are adapted to define, when the mold is closed, a molding cavity corresponding to the outer surface of a desired composite article. Said surfaces are electrostatically sprayed with a molding material to form a layer of molding material over said surfaces. Preferably, electrostatic spraying is performed while heating the mold preferably to a temperature above 135.degree.C. and most desirably between 150.degree. and 190.degree.C. An inflatable center is then inserted into the mold and the mold is closed to define the molding cavity with the inflatable center therein.

Abstract: An apparatus and method are disclosed for removing unreacted monomer and other volatile material from an aqueous dispersion of polymeric substance. An aqueous dispersion containing volatile material to be stripped is injected into a substantially unrestricted contacting tube along with a stripping gas such as steam to provide within the contacting tube a high velocity vaporous mixture of aqueous dispersion and stripping gas. The vaporous mixture is maintained under a pressure above atmospheric and preferably greater than 5 psi gauge within the contacting tube a time sufficient to permit absorption of volatiles from the dispersion to the stripping gas and preferably to permit saturation equilibrium to be approached. The vaporous mixture is discharged from the contacting tube through a nozzle into a substantially unrestricted post-contacting tube, which is maintained below atmospheric pressure, and preferably is impinged against a baffle means.