Apparatus for closing tubes

Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Rod or tubular preform

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B29C 2400

Patent

active

043928072

ABSTRACT:
A bottom in a tube having an open end is formed by heating the tube and a supporting mandrel and advancing a sleeve over the end of the tube which flares outwardly after heating so as to collapse the flared end. The collapsed end of the tube is closed by contacting the collapsed end with a mold which cooperates with the sleeve to form the bottom.

REFERENCES:
patent: 2876496 (1959-03-01), Murphy
patent: 2900665 (1959-08-01), Walker
patent: 3300559 (1967-01-01), Bachr
patent: 3929943 (1975-12-01), Klimaszewski

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