Heating and cooling lunch box with intake air opening

Details Heating and cooling lunch box with intake air opening Heating and cooling lunch box with intake air opening

1987-04-08

1989-05-16

Marcus, Stephen

Special receptacle or package

Combined or convertible

Packaged assemblage or kit

624577, 126261, 165 61, 206545, 220 223, 220412, 220458, B65D 9006, A45C 1120, A47G 2304

Patent

active

048301906

ABSTRACT:
A heating and cooling lunch box which can preserve meals at a suitable temperature for taste a long time depending the type of meals. The lunch box has an outer container, an inner container for forming a heating and heat insulating container and a cooling container engaged with the outer container, heat source and cooling source for heating and/or cooling the heating and heat insulating container and the cooling container, and a cover for covering the upper surface of the inner container. The heat source is adjacent to the heating and heat insulating container, and an air opening for flowing intake air is perforated in the side wall of the outer container. The air opening communicates with a heat source containing chamber for containing the heating composition which produces heat in the presence of said flowing intake air in the heat source containing chamber.

REFERENCES:
patent: 1979222 (1934-10-01), Goodwin
patent: 2584435 (1952-02-01), Doerr
patent: 2823902 (1958-02-01), Reynold
patent: 3372690 (1968-03-01), Ruiz
patent: 3656650 (1972-04-01), Frater
patent: 3908852 (1975-09-01), Ricobene et al.
patent: 4194619 (1980-03-01), Schley
patent: 4604987 (1986-08-01), Keltner
patent: 4630671 (1986-12-01), Sherman et al.
Translation of Japanese Utility Model Publication No. 18985/1982.

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