Pouring plug for liquid paper-containers

Abstract

The present invention relates to a pouring plug used for paper containers filled with juice, milk and the like. The present invention further relates to a pouring plug having a flange portion corresponding to a peripheral surface portion of a fitting hole of a container body and being mounted from inside of the container body, in which a plurality of projecting portions are provided, at a height position larger than a thickness dimension of a structural member of the container body form the flange portion, and on the peripheral surface portion corresponding to the inner peripheral edge of the fitting hole. When the pouring plug is inserted and arranged in the fitting hole, the projecting portions are completely withdrawn on the surface side of the container body so that the plug is positively temporarily fixed, and ultrasonic deposition can be carried out without any trouble.

Dependencies are inferred from the claim text.