Tube sealing apparatus

Details Tube sealing apparatus Tube sealing apparatus

1984-07-05

1986-05-20

Wityshyn, Michael

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Rod or tubular preform

156198, 156500, 1565831, 264319, 264320, 425403, 425DIG55, B29C 3302, B29C 5710

Patent

active

045898359

ABSTRACT:
A tube closure apparatus for sealing the open end of a plastic tube, such as the tip of a pipette, comprising a sealing element constructed of a fluoroplastic material and a heating element for controllably heating the sealing element to a temperature greater than the melting temperature of the plastic tube. Unlike a metal sealing element, the fluoroplastic sealing element resists any tendency of the molten plastic tube to stick to the sealing element. Accordingly, a uniform sealing bead can be efficiently and reproducibly formed at the open end of the plastic tube. The heating element can be heated by resistance, induction, conduction or other suitable means.

REFERENCES:
patent: 3127457 (1964-03-01), Di Pinto
patent: 3166940 (1965-01-01), Allisbaugh et al.
patent: 4368023 (1983-01-01), Hannah et al.

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