Apparatus relating to a preform with geodesic reinforcement ring

Details Apparatus relating to a preform with geodesic reinforcement ring Apparatus relating to a preform with geodesic reinforcement ring

1989-11-22

1990-09-25

Hoag, Willard

Plastic article or earthenware shaping or treating: apparatus

Female mold and means to shape parison directly by internal...

Including means to prepare parison

249122, 249175, 264513, 264541, 264318, 264DIG33, B29C 4526, B29C 4906

Patent

active

049590065

ABSTRACT:
A mold-core rod combination for producing a plastic preform for forming blow molded plastic bottles which comprises: a neck portion defining an opening; a tubular sidewall portion depending therefrom; and an integral base structure depending from the tubular sidewall portion to a closed end; the preform having an outside wall face and an inside wall face with one of these in the base structure having integrally formed thereon a plurality of filets, extending longitudinally of the preform and defining a continuous reinforcing ring of varying thickness spaced from the closed end and circumscribing the base structure, wherein the filets decrease progressively in width and radial thickness at least from the reinforcing ring toward the closed end. The preform is capable of forming a blow molded plastic bottle with a bottom portion having a continuous reinforcing ring of circumferentially continuous radially extending alterations in wall thickness with a regularly undulating cross-section along the circumference. Preferably the filets are integral with the inside wall face.

REFERENCES:
patent: 3137748 (1964-06-01), Makowski
patent: 3191225 (1965-06-01), Polka
patent: 3950468 (1976-04-01), Rainville
patent: 4307137 (1981-12-01), Ota et al.
patent: 4330579 (1982-05-01), Ota et al.
patent: 4481163 (1984-11-01), Ota et al.
patent: 4511418 (1985-04-01), Takami et al.
patent: 4785948 (1988-11-01), Strassheimer
patent: 4785950 (1988-11-01), Miller et al.

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