Method of strengthening a neck portion of a bottle-shaped contai

Details Method of strengthening a neck portion of a bottle-shaped contai Method of strengthening a neck portion of a bottle-shaped contai

1982-05-13

1984-10-09

Silbaugh, Jan

Plastic and nonmetallic article shaping or treating: processes

Treating shaped or solid article

To shrink

264 406, 264520, 264521, 264230, 264235, 264237, 264346, 264348, B29C 2500, B29C 1700

Patent

active

044760841

ABSTRACT:
A method of strengthening the neck portion of a hollow blow-molded bottle-shaped container of a biaxially oriented polyethylene terephthalate resin, which has the steps of heating the neck portion from 140.degree. to 170.degree. C., inserting a die pin of a predetermined shape into the opening of the neck portion, blowing cooling air to the neck portion, thereby shrinking and whitening the neck portion. Thus, the method prevents improper shrinkage deformation of the neck portion due to the thermal influence of the bottle-shaped container.

REFERENCES:
patent: 3562372 (1971-02-01), Schjeldahl et al.
patent: 4375442 (1983-03-01), Ota et al.
patent: 4385089 (1983-05-01), Bonnebat et al.

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