Self-heating/cooling container
AssigneeCrown Packaging Technology, Inc.
InventorPaul Robert Danwoody
Life of this patent
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Abstract
A self-heating or self-cooling container, which uses a chemical reaction to effect heating or cooling. The reagents for the chemical reaction are stored separately in two sealed compartments (5, 6) having a common dividing wall (7), which can move within the compartments to expand the volume of one compartment at the expense of the other compartment. This arrangement allows efficient use of space within the reaction module of the can, which is particularly important where large amounts of reagent are required to obtain the necessary heating or cooling effect and where the products of the chemical reaction occupy a significantly increased volume compared to the initial reagent in the compartment.
Claims14
A container adapted to self-heat or self cool the container comprising:
- a first compartment for holding a product to be heated or cooled,
- a reaction chamber for holding a first reagent,
- a reservoir for holding a second reagent, and
- an unbreakable barrier wall between the reaction chamber and the reservoir that is adapted to separate the first reagent from the second reagent and is adapted to move to increase volume of the reaction chamber and decrease volume of the reservoir,
- wherein the first and second reagents are chosen such that upon mixing an exothermic or endothermic chemical reaction occurs to effect heating or cooling of the product, respectively.
Dependencies are inferred from the claim text.