Patent ID: 6481721
Filing Date: 2002-11-19
Classification: C03B,Y10S

Abstract:
A vacuum sealing apparatus for creating a movable seal with a rotatable overclad tube for creation of a low pressure region therein, wherein the rotatable overclad tube is axially movable in relation to the movable seal, said apparatus comprising:a longitudinal hollow tubular member for insertion into the rotatable overclad tube, said longitudinal hollow tubular member having a distal end which is within the rotatable overclad tube during operation; a sealing member mounted on said distal end, said sealing member having an outer diameter that is a sealing fit within the rotatable overclad tube and having an opening therein communicating with the interior of the longitudinal hollow tubular member, said longitudinal hollow tubular member having a proximal end spaced from said distal end and adapted to be connected to a vacuum source.