Patent ID: 6478564
Filing Date: 2002-11-12
Classification: B29C

Abstract:
An extruder flow channel for simultaneously forming elastomeric strips of predetermined cross-sectional profiles, the extruder flow channel having:a flow inlet end of a predetermined cross-sectional area Ai; a first flow passage and a second flow passage communicating with the flow inlet end; each passage having a flow outlet end of a predetermined cross-section Ao; a flow dam interposed between and separating the first flow passage from the second flow passage, the flow dam characterized by a flow splitter, the flow splitter being substantially triangular in cross-section with an apex located at an inlet end of the dam in close proximity to the flow linlet end, the flow splitter being pivotably movable relative to the dam and the channel, wherein the apex shifts relative to the inlet area Ai, causing the flow splitter locally to increase or locally decrease the flow area of the first flow passage relative to the flow area of the second flow passage.