Method and apparatus for sealing centrifuge tubes

Details Method and apparatus for sealing centrifuge tubes Method and apparatus for sealing centrifuge tubes

1978-06-05

1981-08-25

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

425384, 425392, B29C 2400

Patent

active

042859042

ABSTRACT:
A method of closing or sealing a filler passage formed in a neck or stem protruding from the small access opening in the upper end of a substantially closed centrifuge tube. The neck is formed of a readily fusible material and a heat conductive cap member is positioned over the open end portion of the neck closely confining it therein. Heat and pressure are applied to the cap causing progressive portions of the neck to melt and fold into the filler passage where it forms a molten mass within the filler passage above the access opening to the tube. Heat and pressure are removed, permitting the cap to cool and the molten mass to solidify completely sealing or filler passage of the centrifuge tube. The cap is then removed and the centrifuge tube is fully prepared for centrifugation.

REFERENCES:
patent: 2335799 (1943-11-01), Schwab
patent: 2514937 (1950-07-01), Collins
patent: 3300559 (1967-01-01), Baehr
patent: 3475786 (1969-11-01), Pearson
patent: 3509252 (1970-04-01), Baehr
patent: 3545168 (1970-12-01), Day
patent: 3711230 (1973-01-01), Magerly
patent: 3929943 (1975-12-01), Klimaszewski

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