One piece self-standing blow molded container

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 1/02 (2006.01) B29C 49/00 (2006.01) B29C 49/06 (2006.01) B29C 49/12 (2006.01)

Patent

CA 2210918

A self-standing container (6) with a petaloid base is blow molded from a monobase preform (18). The monobase preform (18) has a thick reinforcing ring forming portion (24) which remains relatively unstretched during blowing. The reinforcing ring forming portion (24) is thicker than both the sidewall forming portion (22) and the bottom forming portion (23) of the preform (18). Because the thicker reinforcing ring forming portion (24) has a greater mass per unit area, it is slightly cooler than the thinner portions of the preform (18). Therefore, the reinforcing ring forming portion (24) stretches to a lesser degree than the thinner sidewall forming portion (22) and bottom forming portion (23) during blow molding. The result is a container (6) having a reinforcing ring (21) extending circumferentially around the base, an oriented gate area (14) and a petaloid base with at least three, preferably five, feet (9).

Ce récipient autoportant (6) à base pétaloïde est soufflé à partir d'une préforme monobase (18) qui comprend une partie épaisse (24) formant un anneau de renforcement qui ne subit pratiquement pas d'étirage au cours du soufflage. Cette partie (24) formant un anneau de renforcement est plus épaisse que la partie (22) formant la paroi latérale et que la partie (23) formant la base de la préforme (18). Comme la partie plus épaisse (24) formant l'anneau de renforcement présente une masse plus importante par unité de surface, elle est légèrement plus froide que les parties plus minces de la préforme (18). En conséquence, cette partie plus épaisse (24) est étirée à un moindre degré que la partie plus mince (22) formant la paroi latérale et la partie (23) formant la base au cours du soufflage. Il en résulte un récipient (6) comportant un anneau de renforcement (21) s'étendant sur la circonférence de la base, une zone d'entrée orientée (14) et une base pétaloïde à au moins trois pieds (9), de préférence à cinq pieds.

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