Patent ID: 8740000

Claim:
An opening device of a liquid food container comprising: a bottom and a main body formed with a packaging material which is laminated on both sides of a paper substrate with thermoplastic resin; and a top part which is joined to an upper end of the main body and formed with thermoplastic resin, wherein the top part has a lid integrally moulded with the thermoplastic resin and covering a spout, the lid divides the top part and includes weakening lines configured for sealing and adapted to be easily cut, and the lid comprises a first lid part on a front-face side of the container, a second lid part on a rear-face side of the container, and a gripper projected from the first lid part, wherein a first hinge is formed between the first lid part and the second lid part, the weakening lines are cut when the gripper is pulled up, and the first lid part rotates on the first hinge such that the weakening lines are cut to open narrowly, and wherein a second hinge is formed in an edge of the second lid part by the rear-face side of the container, the weakening lines are cut by further pulling the gripper, and the second lid part rotates on the second hinge such that the weakening lines are cut to open more widely.