Patent ID: 9180995
Filing Date: 2015-11-10
Classification: B65D

Abstract:
1. A retort cup comprising: a tubular barrel portion formed of a barrel portion forming blank having a paper layer and thermoplastic resin layers provided on both surfaces of the paper layer; and a bottom portion which seals one of openings of the barrel portion, wherein the bottom portion has a downwardly bent peripheral edge portion, the barrel portion has an attached barrel overlap portion where both end edges of the barrel portion forming blank are overlapped with each other and sealed, a lower fold-back portion which is formed at a lower end of the barrel portion by folding back the barrel portion forming blank inwardly, and an upper fold-back portion which is formed by folding back the ends of the fold-back barrel portion forming blank inwardly, the lower end of the barrel portion, the upper fold-back portion, and the peripheral edge portion of the bottom portion are closely sealed together, with the peripheral edge portion of the bottom portion being inserted into the lower fold-back portion, the paper layer has a cutout portion in which a corner portion of the paper layer on an upper side of the tubular barrel portion is removed, and the thermoplastic resin layers include end edge extending portions that extend over a predetermined width from both respective end edges of the barrel portion.