Patent ID: 6248380
Filing Date: 2001-06-19
Classification: B32B,B65D,Y10T

Abstract:
A package, comprising:a. a product support member having a cavity formed therein and a peripheral flange extending from said cavity, a product being disposed within said cavity;b. a lid enclosing the product within said cavity of said support member, said lid comprising a thermoplastic, gas-permeable film bonded to a thermoplastic, substantially gas-impermeable film, said gas-permeable film having a preselected intra-film cohesive strength;c. a first heat-weld which bonds said gas-permeable film to said peripheral flange of said support member; andd. a second heat-weld which further bonds said gas-impermeable film to said gas-permeable film and extends around said peripheral flange to define a predetermined area of contact between said gas-imnpermeable and gas-permeable films in which said films have been caused to become molten, intermixed, and then cooled, said first and second heat-welds each having a bond-strength which is greater than the intra-film cohesive strength of said gas-permeable film so that said lid preferentially delaminates within said gas-permeable film upon peeling.