Food warning device containing a rechargeable phase change material
AssigneePhase Change Laboratories, Inc.
InventorsSigurd Frohlich, Hans Jochen Koellner, Ival Salyer
Life of this patent
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Abstract
A heating device for food and other products is provided. The device includes a unit containing a rechargeable phase change material which is capable of being charged with heat energy by a heat source such as a conduction, convection, radiant heat, electrical resistance, electrical inductance, microwave, or radio frequency. The phase change material may be provided in a variety of forms and may comprise linear alkyl crystalline alkyl hydrocarbons, alkyl hydrocarbon waxes, crystalline fatty acids, linear crystalline primary alcohols, ethylene copolymers, polyethylene, polyethylene glycol, polyethylene oxide, and acetamide.
Claims23
A device for heating food comprising a container and a rechargeable phase change material unit removably positioned in said container,
- said rechargeable phase change material unit including a first shell portion and a second shell portion forming a shell having a cavity;
- at least one layer of a solid phase change component having a discrete shape disposed in said cavity of said shell;
- said phase change component including a phase change material selected from the group consisting of linear crystalline alkyl hydrocarbons, alkyl hydrocarbon waxes, crystalline fatty acids, linear crystalline primary alcohols, ethylene copolymers, polyethylene, polyethylene glycol, polyethylene oxide, and acetamide;
- and wherein said phase change material is capable of being charged with heat energy by a heat source selected from the group consisting of conduction, convection, radiant heat, electrical resistance, electrical inductance, microwave heat, radio frequency, or combinations thereof to maintain said device at a desired temperature.
A device for heating food comprising a container and a rechargeable phase change material unit removably positioned in said container, said rechargeable phase change material unit including a first shell portion and a second shell portion forming a shell having a cavity;
- at least one layer of a solid phase change component having a discrete shape disposed in said cavity of said shell, said phase change component comprising a solidified melt mixture of a polyolefin resin, an ethylene copolymer, silica particles and a phase change material, wherein said phase change material is capable of being charged with heat energy by a convection oven to maintain said device at a desired temperature.
A device for heating food comprising a container and a rechargeable phase change material unit removably positioned in said container, said rechargeable phase change material unit including a first shell and a second shell portion forming a shell having a cavity;
- at least one layer of a solid phase change component having a discrete shape disposed in said cavity of said shell, said phase change component comprising a porous product which has been imbibed with a phase change material, containing up to about 5% by weight of a polymeric thickening agent, wherein said phase change material is capable of being charged with heat energy by a heat source to maintain said device at a desired temperature.
Dependencies are inferred from the claim text.