Patent ID: 8087921
Filing Date: 2012-01-03
Classification: A21C,B29C,B29K,Y10S

Abstract:
1. An extrusion head comprising: a multi-piece extrusion head comprising at least two pieces, wherein the at least two pieces define at least a portion of an inner cavity that extends the length of the multi-piece extrusion head; an material inlet on a first side of the multi-piece extrusion head and a material outlet on a second side of the multi-piece extrusion head; a first axial venting gap, wherein the first axial venting gap is dimensioned to allow for the venting of a gas but substantial retention of the material to be extruded during extrusion, the first axial venting gap comprising a first portion extending in a substantially continuous manner along the length of the multi-piece extrusion head and in fluid communication with the inner cavity, and a second portion in direct fluid communication with the first portion, wherein the second portion is wider than the first portion; and wherein at least a portion of the first axial venting gap is formed at a first intersection of at least two pieces of the multi-piece extrusion head.