Patent ID: 6132454
Filing Date: 2000-10-17
Classification: A61F

Abstract:
A heat pack comprising:a sealed flexible impervious container capable of retaining a liquid therein, said container capable of remaining sealed when heated to a temperature of at least 55.degree. C.;a porous non-rigid filling material located within said container, said filling material selected from the group consisting of at least one of a woven textile material, a nonwoven material, a sponge-like material, and a paper material, said filling material capable of absorbing liquid in an amount at least equal in weight to a weight of said filling material;a preservative having a concentration which inhibits microbial growth interior of said container; anda valve means positioned within said container for permitting said container to be emptied of liquid and filled with liquid, said valve means for removing a gas from said container after said container has been filled with the liquid, said gas selected from the group consisting of at least one of air and steam.