Form fitting lightweight container cover

Abstract

A lightweight form fitting container cover having a top surface, a bottom surface, and an integrally formed rim projecting downwardly from the bottom surface and defining an interior space within the rim, and further having at least one layer of deformable foam inserted into the interior space within the rim for a form fit over the upper rim of a container.

What is claimed as invention is:  
     
         1 . A lightweight form fitting container cover, comprising: 
 lightweight lid having a top surface, a bottom surface, and an integrally formed rim projecting downwardly from said bottom surface and defining an interior space within said rim;    at least one layer of deformable foam inserted into the interior space within said rim.    
     
     
         2 . The lightweight form fitting container cover of    claim 1   , wherein said lid is fabricated from rigid lightweight plastic.  
     
     
         3 . The lightweight form fitting container cover of    claim 2   , wherein said cover is made from injection molded plastic.  
     
     
         4 . The lightweight form fitting container cover of    claim 1    wherein said at least one layer of deformable foam is fabricated of a thermosetting foam resin.  
     
     
         5 . The lightweight form fitting container cover of    claim 5   , wherein said thermosetting foam resin is selected from the group consisting of open cell polyurethane foams, PVA foam, HYPOL foam, pipe insulation foam, and structural buoyancy foams used in fiberglass boat manufacture, or any combination of these.  
     
     
         6 . The lightweight form fitting container cover of    claim 5    wherein said thermosetting foam resin is expanded polystyrene foam having a chemical formula of (C 8 H 8 )n.  
     
     
         7 . The lightweight form fitting container cover of    claim 6    wherein said EPS has a density in the range of 0.5 to 4.0 pcf, inclusive.  
     
     
         8 . The lightweight form fitting container cover of    claim 1    wherein said at least one deformable foam layer is inserted as a preformed sheet.  
     
     
         9 . The lightweight form fitting container cover of    claim 1    wherein said at least one deformable foam layer is poured into the interior space defined by said rim and allowed to set until hardened.  
     
     
         10 . The lightweight form fitting container cover of    claim 1   , further including a second layer of thermoplastic resin interposed between said deformable foam layer and said bottom surface of said container cover.  
     
     
         11 . The lightweight form fitting container cover of    claim 10    wherein said second layer of thermoplastic resin is made of STYROFOAM.  
     
     
         12 . The lightweight form fitting container cover of    claim 1    wherein said deformable foam layer is attached to said cover with adhesive.