Carrying case

Claim 1

A carrying case comprising: an endless sidewall structure having a top opening and a bottom opening consisting of an inner support means defining the three dimensional shape of said case, sidewall insulative material coextensive with and adjacent to said support means and a layer of heat sealable sidewall plastic material enclosing both said support means and said insulative material forming a flange about the outer peripheral edge of said bottom opening; a bottom preform overlying said bottom opening consisting of reinforcement means defining the planar shape of said preform in correspondence with the bottom opening of said case, bottom insulative material adjacent said reinforcement means and, a layer of heat sealable bottom preform plastic material enclosing both said reinforcement means and said insulative material having an outwardly extending peripheral lip, said flange and lip forming a heat sealed lap joint that connects the bottom preform to said sidewall structure; a cover overlying said top opening consisting of a first stiffening member defining the planar shape thereof in correspondence with said top opening, cover insulative material adjacent to said stiffening member including a lower thickened layer extending from said first stiffening member into the interior area of said case with a second stiffening member adjacent the underside of said lower thickened layer and an intermediate layer of heat sealable plastic material interposed between said first stiffening member and said lower thickened layer of insulative material and, a layer of heat sealable cover plastic material enclosing both of said stiffening members and said insulative material.