Blow-molded bottle-shaped container of biaxially oriented polyet

Details Blow-molded bottle-shaped container of biaxially oriented polyet Blow-molded bottle-shaped container of biaxially oriented polyet

1989-07-12

1991-02-12

Weaver, Sue A.

Bottles and jars

Ejecting

Siphon type

215 31, 428 3692, 4285428, B65D 102, B65D 2300, B29B 1114

Patent

active

049917285

ABSTRACT:
A hollow, blow-molded, bottle-shaped container of a biaxially oriented polyethylene terephthalate which has a stepped portion formed on the inner peripheral surface of a boundary between a neck portion and a shoulder portion with a body portion, and crystallized by a heat treatment before being biaxially oriented blow-molded from an injection-molded primary piece or parison, thereby abruptly reducing the thickness of the wall at the boundary from the neck portion to the shoulder portion to substantially equal the thickness of the body portion. This bottle-shaped container is manufactured from an injection-molded preformed piece or parison in which a recess groove is formed on the peripheral surface of the shoulder forming portion. Thus, any deterioration in the physical properties of the neck and shoulder portions of the bottle-shaped container can be eliminated.

REFERENCES:
patent: 3900120 (1975-08-01), Sincock
patent: 3934743 (1976-01-01), McChesney et al.
patent: 4025594 (1977-05-01), Agrawal
patent: 4164298 (1979-08-01), Nishikawa et al.
patent: 4232022 (1980-11-01), Brady et al.
patent: 4256789 (1981-03-01), Suzuki et al.
patent: 4320083 (1982-03-01), Jakobsen
patent: 4379099 (1983-04-01), Ota et al.
patent: 4406854 (1983-09-01), Yoshino

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