Refrigerator construction and the manufacture of panels therefor

Details Refrigerator construction and the manufacture of panels therefor Refrigerator construction and the manufacture of panels therefor

1974-10-15

1977-06-21

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

425324R, 425388, 425DIG58, 264 92, B29C 1702

Patent

active

040308707

ABSTRACT:
A panel constructed cabinet for refrigerators, freezers or the like is disclosed along with a method of manufacture and an apparatus for manufacture. The cabinet includes an inner liner formed of panels of thermoplastic material having mating edge connections. The connections are formed by heating the plastic sheet along spaced and parallel lines adjacent to the edges thereof, to provide fold lines permitting the formation of channels proportioned to receive mating tongues from adjacent panels. Along some edges of the thermoplastic panels the channels are formed to extend laterally, with respect to the panel, and along other edges the channels are formed substantially parallel to the panels. The outer casing includes a combination of metallic panels along the sides and foil laminated panels along the top, back and bottom of the cabinet. Foamed insulation rigidifies the panels and provides the necessary insulation therebetween. An apparatus for forming the thermoplastic panels is disclosed which includes means to clamp a sheet of thermoplastic material, means to heat the thermoplastic material along spaced lines, and means to fold the edge portions of the sheet to form the channels used in the assembly.

REFERENCES:
patent: 2006060 (1935-06-01), Schilder et al.
patent: 2784455 (1957-03-01), Pulaski
patent: 2892217 (1959-06-01), Luboskez
patent: 3149376 (1964-09-01), Lee
patent: 3169274 (1965-02-01), Colombo
patent: 3577593 (1971-05-01), Jackson
patent: 3598463 (1971-08-01), Kesling
patent: 3640668 (1972-02-01), Brown, Jr. et al.
patent: 3668033 (1972-06-01), Evans
patent: 3816051 (1974-06-01), Houghton

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