Importance

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Abstract

An insulating cup or container (50) and a method of manufacturing it comprises (first embodiment) providing a sidewall blank (12B) having two sections separated by a fold score (15), and a separate insulating sheet (18)(corrugated, ribbed, embossed, foamed, perforated, etc.) which is adhesively fastened to one of the sections. Adhesive is applied to an area (21) adjacent the fold score. The blank is folded in half along the fold score, to form a three-layered assembly with the insulating sheet in the middle. The adhesive that was applied adjacent the fold score bonds the two sections together at an area (21) adjacent a fold edge (22) on the inside surfaces of the folded blank. The assembly is wrapped around a mandrel to bring the outer edges together at a sideseam (22S) to form a sidewall 12. The side seam is sealed, the bottom is added, and the rim is formed. The placement of the adhesive is critical, in that it holds the blank in its folded state and allows it to be wrapped properly at high production speeds. In a second embodiment, the insulating layer can be a coating on one or both of the sections of the two-section starting blank. In a third embodiment, the insulating section (40) can be integral with, and extend from, one edge of the starting blank. It is folded over first to form the middle layer of the wrappable assembly.

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First Claim