Yoshino Kogyosho Co., Ltd.

Masaru Ono

Mitsuo Furusawa

Tsugio Arai

Eiji Gotou

The invention is aimed at preventing bottom crack from occurring in a peelably laminated plastic container and maintaining the container stably in good in-use condition. This can be achieved by increasing the anti-peeling strength of a pair of rib strips, with which the bottom rib is formed, in the bottom seal that has been obtained by pinching off the parison at the bottom and molding the parison into a blow molded, peelably laminated plastic container. The bottom sealof a blow molded, peelably laminated containeris reinforced by a pair of rib stripswhich are pressed to each other to form the bottom rib. A multiple number of cavitiesare formed in the bottom ribin such a way that the rib stripon one side is pushed toward, and caved into, the rib strip on the other side at several points, and vice verse. An expanded portionis formed in the ceiling of each cavity. As a result, an undercut engagement portionis formed along the contact faces of both rib stripsso that anti-cracking bottom strength of the bottom seal is enhanced.

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Buzenn, Japan

Masaru Ono