Patent ID: 7841974

Claim:
A method of making a container blank suitable for preparing an insulated container: a) providing a container material web comprising paperboard, wherein the web is of a sufficient width to provide one or more container blanks cuttable from the web; b) cutting the container material web so as to provide one or more vents in a sidewall of one or more container blanks cuttable from the web; c) applying an adhesive to the container material web in a pattern approximately coinciding with a perimeter of one or more container blanks cuttable from the web, thereby providing one or more adhesive patterns on the container material web; d) applying a shrink film web to the one or more adhesive patterns to provide a web-shrink film laminate, wherein the shrink film is adhered to the container material web at locations defined by the one or more adhesive patterns; e) cutting the container material-shrink film laminate to provide one or more container blanks, wherein the container blanks comprise one or more vents in a location within a perimeter defined by the adhesive pattern, wherein the one or more vents substantially eliminate the formation of a vacuum in a space between the container material web and the shrink film during an activation of the shrink film; wherein the container blank is suitable for preparing an insulated container.