Bottles and jars – End wall structure – One-piece side and end wall
Reexamination Certificate
2005-09-28
2009-11-10
Stashick, Anthony (Department: 3781)
Bottles and jars
End wall structure
One-piece side and end wall
C215S012100, C215S012200, C215S370000, C215S371000
Reexamination Certificate
active
07614515
ABSTRACT:
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 seal13of a blow molded, peelably laminated container1is reinforced by a pair of rib strips14which are pressed to each other to form the bottom rib15. A multiple number of cavities16are formed in the bottom rib15in such a way that the rib strip14on one side is pushed toward, and caved into, the rib strip on the other side at several points, and vice verse. An expanded portion18is formed in the ceiling of each cavity16. As a result, an undercut engagement portion19is formed along the contact faces of both rib strips14so that anti-cracking bottom strength of the bottom seal is enhanced.
REFERENCES:
patent: 5799809 (1998-09-01), Sako et al.
patent: 6039204 (2000-03-01), Hosokoshiyama et al.
patent: A-08-175568 (1996-07-01), None
patent: A-08-216238 (1996-08-01), None
patent: A-11-300815 (1999-11-01), None
Arai Tsugio
Furusawa Mitsuo
Gotou Eiji
Ono Masaru
Oliff & Berridg,e PLC
Stashick Anthony
Wright Madison L
Yoshino Kogyosho Co. Ltd.
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