Thermal container

Abstract

A thermal insulating liner for a container lid has a top sheet and a bottom sheet spaced by a core. The bottom sheet has an exterior metal foil layer. A side edge-to-side edge transverse cut line extends through the bottom sheet proximate each of two opposed ends of the liner. The liner has reduced thickness end margins extending between each said side edge-to-side edge transverse cut line and each of the opposed ends. A die to make the lid liner has a central well and, proximate each end of the die, an upward step to a land with an inside edge of the step having a ramp surface. A first cutting blade protrudes upwardly from the land and a second cutting blade protrudes upwardly above the land at each end of the die and above the level of the first cutting blade.

1 . A die for forming a thermal insulating liner for a container lid, comprising:
 a central well;   proximate each end of said die:   an upward step to a land, an inside edge of said step having a ramp surface;   a first cutting blade protruding upwardly from said land;   a second cutting blade protruding upwardly above said land at said each end of said die, said second cutting blade extending above said first cutting blade.   
     
     
         2 . The die of  claim 1  wherein said die is rectangular, each said land is an end land and each said step is an end step, and further comprising, proximate each side of said die:
 an upward side step to a side land, an inside edge of said side step having a ramp surface; 
 a cutting blade protruding upwardly above said side land at said each side of said die. 
 
     
     
         3 . The die of  claim 2  wherein each said side land is narrower than each said end land. 
     
     
         4 . The die of  claim 3  wherein each said end land has a lower level and an upward land step to an upper level at said second cutting blade, an inside edge of said land step having a ramp surface. 
     
     
         5 . The die of  claim 4  wherein each said side land extends to a level of each said end land upper level. 
     
     
         6 . A die for forming a thermal insulating liner for a container body, comprising:
 a central well;   a circumferential cutting blade defining a generally rectangular shape;   four generally square lands extending from each corner of said generally rectangular shape;   a narrow land extending along said cutting blade and between each pair of corner lands and a ramp surface between said central well and each said narrow land.   
     
     
         7 . The die of  claim 6  further comprising a pair of end-to-end creasing ridges, each end-to-end creasing ridge extending along an inside side of a pair of corner lands and a pair of side-to-side creasing ridges, each side-to-side creasing ridge extending along an inside side of a pair of corner lands. 
     
     
         8 . The die of  claim 7  further comprising a diagonal creasing ridge extending through each said corner land from a corner of said generally rectangular shape.