Patent ID: 6190490
Filing Date: 2001-02-20
Classification: B29C,B32B,F25D

Abstract:
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; andg) securing said seal channel to said reinforced resinous material comprising said cover layer.