Patent ID: 7147774
Filing Date: 2006-12-12
Classification: B01D,B29C,Y10S

Abstract:
1. A filtration apparatus for use in polymer processing systems, comprising: (a) a housing having an internal bore for directing a polymer flow in a channel oriented transversely to the bore; (b) a slide plate movable through the channel and across the bore and comprising an upstream slide plate surface, a downstream slide plate surface, and at least one filter element; (c) an upstream seal ring annularly disposed about a central bore axis of the bore and comprising first and second opposing upstream seal surfaces, the first upstream seal surface facing downstream for sealably contacting the upstream slide plate surface, and the second upstream seal surface angled with respect to the bore axis; and (d) a plurality of separate and individual ring segments arranged in frictional engagement with each other to form a segmented ring annularly disposed about the bore axis, each ring segment comprising a tapered ring surface generally complementarily angled relative to and sealably contacting the second upstream seal surface.