Method of making a closure member for a refrigerated storage enclosure
OwnerJoseph R. Tippmann, Vincent P. Tippmanninventors
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Abstract
A method is disclosed for forming an insulated storage enclosure comprising the steps of providing a slab of polyurethane, forming recesses in the slab representing access openings to the enclosure, applying a layer of fiberglass reinforced resinous material to one side of said slab, cutting said slab into sections representing the side and ceiling members of the enclosure, providing a base, erecting the side and ceiling members on the base, and applying a layer of the reinforced material over the uncoated side and ceiling surfaces. Also disclosed is the method of constructing an insulted closure member for the enclosure.
Claims8
A method of making a closure member for a refrigerated storage enclosure comprising the steps of:
- a) providing a base having a smooth upper surface and having a wall extending around the periphery thereof to form a shallow rectangular-shaped mold cavity;
- b) providing at least a first layer of fiberglass reinforced resinous material and laying said first layer on said base extending to said wall;
- c) providing a core of polyurethane material and positioning said core in said mold cavity on said first layer;
- d) providing at least one border layer of fiberglass reinforced resinous material and applying said border layer to said first layer and a portion of said core;
- e) providing a cover layer having at least one layer of fiberglass reinforced resinous material and applying it over said entire core and said border layer;
- f) positioning a seal retaining channel around said core and spaced from said wall;
- and
- g) securing said seal channel to said reinforced resinous material comprising said cover layer.
Dependencies are inferred from the claim text.