Method of making a foam insulated vessel

Details Method of making a foam insulated vessel Method of making a foam insulated vessel

1989-07-21

1991-03-26

Dawson, Robert A.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 466, 264 469, 264 55, B29C 6722

Patent

active

050027093

ABSTRACT:
A method of producing a foam insulated vessel, such as a water heater. The water heater includes a tank to contain water to be heated and a jacket is spaced outwardly of the tank to provide a cavity therebetween. A band of self-supporting, gas entrained, foamable resin is applied to either the outer surface of the lower end portion of the tank, or to the inner surface of the jacket. The band of foamable resin expands radially to form a closure or dam that divides the cavity into a pair of isolated spaces. A liquid foamable resin composition is then introduced into one of the spaces and expands to fill the space and provide an insulating layer between the tank and the jacket.

REFERENCES:
patent: 2947307 (1960-08-01), Hoppe
patent: 3878686 (1975-04-01), Hageman et al.
patent: 4372028 (1983-02-01), Clark et al.
patent: 4477399 (1984-10-01), Tilton
patent: 4628184 (1986-12-01), West
patent: 4861968 (1989-08-01), West
patent: 4878482 (1989-11-01), Pfeffer
patent: 4898630 (1990-02-01), Kitoh et al.

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