Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Rod or tubular preform
Patent
1981-05-11
1983-07-12
Pavelko, Thomas P.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Rod or tubular preform
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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