Preform for use in blow molding a container subjected to hot fil

Details Preform for use in blow molding a container subjected to hot fil Preform for use in blow molding a container subjected to hot fil

1985-04-22

1987-03-10

Epstein, Henry F.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

215 1C, 215 31, 4285428, B65D 100

Patent

active

046490680

ABSTRACT:
This relates to a preform which is injection molded and which is especially intended for use in the blow molding of a container suitable for receiving a hot fill product. Most particularly, the neck finish of the preform, which becomes the neck finish of the resultant blow molded container, is reinforced against axial compression or foreshortening as may occur when the neck finish is heated to a temperature approaching the glass transition temperature of the polyester from which the neck finish is formed. So as to resist deformation of the neck finish, the neck finish is provided on the interior surface (mouth) thereof with a plurality of axially extending, radially inwardly projecting, circumferentially spaced ribs. If the thread means of the neck finish for receiving a closure is of the interrupted type, there will be at least one rib for each thread element.

REFERENCES:
patent: 3961113 (1976-06-01), Marco
patent: 4288478 (1981-09-01), Kinoshita et al.
patent: 4330579 (1982-05-01), Ota et al.
patent: 4333904 (1982-06-01), Jakobsen
patent: 4374878 (1983-02-01), Jakobsen et al.
patent: 4406854 (1983-09-01), Yoshino
patent: 4463056 (1984-07-01), Steele

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