Packaging containers

Abstract

This article is a packaging container formed by molding a sheet-like blank shown in the reference development by a press. The blank shown in the reference development is folded in mountain folds at the dashed lines and in valley folds at the two-dot chain lines, and the blank is heated while being pressed during molding, whereby the synthetic resin coating layer provided on the surface of the blank melts, and the blank is crimped to maintain its shape as a packaging container. Furthermore, the outer edge of the blank is rolled to form a rolled portion with a substantially circular cross section at the edge of the container, thereby improving the overall strength and stably maintaining the shape of the container.

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