Crystallization method of neck of primary molded product for...

Details Crystallization method of neck of primary molded product for... Crystallization method of neck of primary molded product for...

2011-07-19

2011-07-19

Gupta, Yogendra N (Department: 1744)

Plastic and nonmetallic article shaping or treating: processes

Treating shaped or solid article

By a temperature change

Reexamination Certificate

active

07981351

ABSTRACT:
A method for thermally crystallizing a neck of a primary molded product for forming a bottle-shaped container made of polyethylene terephthalate as principal ingredient, said neck having a functional part and a neck ring at a lower end thereof, said functional part being formed with screw threads at an upper portion thereof and a bead ring below the screw threads, said method comprising: heating the neck, and then squeezing the bead ring heated to the heat-deformable temperature, from outside so as to form an outer diameter of the bead ring within a dimensional tolerance for deformation with regard to sealing effect.

REFERENCES:
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patent: 4590021 (1986-05-01), Ota et al.
patent: 6217818 (2001-04-01), Collette et al.
patent: A-62-284724 (1987-12-01), None
patent: A-11-170354 (1999-06-01), None
patent: A-2002-145238 (2002-05-01), None

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