Blow molded plastic bottle

Details Blow molded plastic bottle Blow molded plastic bottle

1981-03-24

1982-06-15

Norton, Donald F.

Bottles and jars

Ejecting

Siphon type

220 70, B65D 102

Patent

active

043346278

ABSTRACT:
This disclosure relates to an unexpected increase in the strength of a bottle bottom of the champagne type by the addition of ribs internally of the preform when the preform is axially stretched prior to the blowing thereof within the blow mold. Most particularly, by adding internal ribs to the interior surface of the bottom defining portion of the preform, the preform has the bottom forming portion unduly strengthened against shrinkage in wall thickness when the preform is axially lengthened through the use of a stretch rod. The net result is that the stretching of the preform and the thinning of the wall is held to a minimum in the bottom forming portion of the preform and is transferred primarily to the body forming portion of the preform where lesser wall thickness does not unduly detract from the strength of the bottle.

REFERENCES:
patent: 2787397 (1957-04-01), Radford
patent: 3029963 (1962-04-01), Evers
patent: 3137748 (1964-06-01), Makowski
patent: 3643829 (1972-02-01), Lachner
patent: 3881621 (1975-05-01), Adomaitis
patent: 4134510 (1979-01-01), Chang
patent: 4170622 (1979-10-01), Uhlig

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