Blow molded, oriented plastic bottle and method for making same

Details Blow molded, oriented plastic bottle and method for making same Blow molded, oriented plastic bottle and method for making same

1972-12-29

1976-01-27

Lesmes, George F.

Bottles and jars

Ejecting

Siphon type

64 17, 64327, 428 35, 428212, 428910, 428156, 428409, B65D 2300, B32B 702

Patent

active

039347435

ABSTRACT:
A molecularly oriented article having a tubular sidewall is blow-molded from a thermoplastic parison which is heat-treated prior to blowing to provide the parison sidewall with a temperature gradient wherein the temperature of the inside of the sidewall is greater than that of the outside, both of said temperature being within the orientation temperature range of the thermoplastic. The temperature gradient results in the sidewall of the article having a different and more uniform circumferential orientation release stress distribution radially across the sidewall than would be obtained if the parison were blown isothermally.

REFERENCES:
patent: 3125619 (1964-03-01), Miller
patent: 3141912 (1964-07-01), Goldman
patent: 3191225 (1965-06-01), Polka
patent: 3202739 (1965-08-01), Zavasnik
patent: 3294883 (1966-12-01), Polka
patent: 3426102 (1969-02-01), Solak
patent: 3594862 (1971-07-01), Seefluth
patent: 3721269 (1973-03-01), Choate
patent: 3775524 (1973-11-01), Seefluth
patent: 3786221 (1974-01-01), Silverman

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