Patent ID: 8591747
Filing Date: 2013-11-26
Classification: B01F,C02F,Y10T

Abstract:
1. A container for releasing an additive composition into a liquid composition, the container comprising: a casing impermeable to a liquid composition, the casing comprising a casing body and a separate end portion coupled to the casing body, the casing body defining a substantially hollow interior, at least one opening in the separate end portion into the substantially hollow interior and at least one further opening into the substantially hollow interior, the at least one further opening located in an end of the casing body substantially opposite the end portion and being positioned to allow air to pass out of the substantially hollow interior through the at least one further opening; a plurality of solid particles of an additive composition comprising a chemical additive component located in the substantially hollow interior of the casing body; a membrane component covering the at least one opening in the separate end portion and is effective to provide for release of the additive composition from the substantially hollow interior into a liquid composition in contact with the casing, the membrane component being fixedly secured to the separate end portion; a support structure extending across the membrane component covering the at least one opening to support the membrane component, the support structure and the separate end portion being a unitary structure; and an umbrella valve operable to allow air to pass out of the substantially hollow interior through the at least one further opening and to substantially prevent a liquid from passing into or out of the substantially hollow interior across the valve through the at least one further opening.