Gel-impregnated sponge
OwnerHarold S. Akrongold, Rochelle Akrongoldinventors
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Abstract
A gel-impregnated sponge having at least two layers of which at least one layer is impregnated with a hardened gel material and at least one layer is unimpregnated sponge material, the impregnated layer having a fibrous or fur-like coating on its outer surface areas.
Claims11
A shaped article comprising a unitary sponge body having a selected porosity, said sponge body being impregnated with a solidified gel material, said gel material extending throughout the interior of the sponge body but being spaced from the exposed surface areas of said sponge body, said exposed surface areas being free of said solidified gel material.
A method of making a shaped article which comprises inserting a gel-forming material into a mold at a temperature at which said material is in the liquid state, immersing a sponge into the gel-forming material in the mold while said material is still in the liquid state, removing the sponge, which has been impregnated with the material during immersion, from the mold before solidification of said material has been completed, reversing the impregnated sponge, while maintaining said sponge free from compressive pressure, to permit the material, while still in its liquid state, to collapse inwardly from the immersed surface areas of the sponge, and then allowing the impregnated sponge to cool to complete solidification of said material below said surface areas.
Dependencies are inferred from the claim text.