Tapered plastic preform for telescopic application

Details Tapered plastic preform for telescopic application Tapered plastic preform for telescopic application

1975-04-15

1977-01-25

Ives, P. C.

Stock material or miscellaneous articles

Decorative article

Constructed from filamentary or flat sheet material

264 94, 264 97, 264DIG64, 428167, 428179, 428180, 428182, 229 15R, 229 45, B32B 904, B65D 100

Patent

active

040052451

ABSTRACT:
The present invention relates generally to improvements in plastic preforms adapted for telescopic association with a complementary smooth surfaced mandrel such as is used in conventional plastic blow molding machines. More particularly, the present invention contemplates a novel type of plastic preform as herein, which comprises an elongate hollow plastic member, the inner surface of which in the aggregate conforms generally with the shape defined by the smooth peripheral surface of a complementary mandrel. The inner peripheral surface of the hollow plastic member or preform below the rim portion presents a plurality of circumferentially spaced surface portions adapted for initial direct impingement with restricted areas of the peripheral surface of a complementary smooth surfaced mandrel, the spacing between the said surface areas of impingement providing passageways extending generally longitudinally throughout substantially the entire longitudinal extent of the plastic member. The inner rim portion is devoid of such surface areas of impingement for air sealing the preform on the mandrel.

REFERENCES:
patent: 3182103 (1965-05-01), Blaylock et al.
patent: 3298893 (1967-01-01), Allen
patent: 3347966 (1967-10-01), Seefluth
patent: 3398428 (1968-08-01), Fuerst et al.
patent: 3748215 (1973-07-01), Lenzi

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