Patent ID: 7306446
Filing Date: 2007-12-11
Classification: B29C,B29K

Abstract:
1. A nozzle assembly comprising, a first inlet to receive a first polymeric material, a second inlet to receive a second polymeric material, a first channel having an inner passage to receive a first portion of the first polymeric material from the first inlet and feed a combination area within the nozzle assembly with the first polymeric material, a second channel having an inner passage to receive a second portion of the first polymeric material from the first inlet and feed the combination area with the first polymeric material, a third channel having an inner passage to receive a portion of the second polymeric material from the second inlet and feed the combination area with the second polymeric material, wherein the combination area simultaneously combines the polymeric materials from the first, second, and third channels to form an annular output stream having multiple annular layers, and wherein the combination area is configured to terminate the flow of the second polymeric material from the third channel using a minimum volume of material flowing from the first and second channels while avoiding flow instabilities.