Preform for making a plastic can body

Details Preform for making a plastic can body Preform for making a plastic can body

1991-10-22

1994-08-30

Nold, Charles R.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

4285428, 215 1C, B65D 2300

Patent

active

053426630

ABSTRACT:
A preform is used for making a plastic can body by the biaxial stretch blow molding process. The preform is a cylindrical member having a bottom wall, a side wall, a shoulder and a flange extending outwardly from the shoulder. The flange has a thickness of about one-third of the thickness of the side wall. The shoulder is gradually thinned to form the flange. The flange is not subject to the biaxial stretch blow molding process, maintaining its injected profile, having a mechanical durability and non-gas-permeability due to flow orientation of plastic molding material which is made to flow through a relatively narrow area. The flange is double-seamed with a lid.

REFERENCES:
patent: 3978232 (1976-08-01), Dodsworth et al.
patent: 4496064 (1985-01-01), Beck et al.

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