Apparatus for making tubular containers

Details Apparatus for making tubular containers Apparatus for making tubular containers

1974-04-24

1976-03-30

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

With direct application of magnetic force to manipulate...

425425, 425433, 425435, 264 24, 264309, B29C 500, B29D 2300

Patent

active

039471659

ABSTRACT:
An apparatus and method for making seamless tubular containers having a first end terminating in a shoulder and threaded neck of a reduced diameter with increased wall thickness and a second open end. The process uses a mold having an internal surface configuration corresponding to the external configuration of the desired tubular container. Suction means draws electrostatically charged powder through the mold and permits a portion thereof to deposit on the internal surface, the amount of deposition being partially controlled by the surface configuration. Subsequently, the container is heated to fuse the deposited powder into homogeneous mass, while subsequent cooling permits shrinking of the container away from the mold walls such that it may be removed by hand or by mechanical apparatus.

REFERENCES:
patent: 2904836 (1959-09-01), Jefferson et al.
patent: 3187381 (1965-06-01), Britten
patent: 3239906 (1966-03-01), Ribot
patent: 3491170 (1970-01-01), Roe, Jr.
patent: 3660547 (1972-05-01), Ruckberg

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