Patent ID: 7267474
Filing Date: 2007-09-11
Classification: B29C

Abstract:
1. A plasticating screw including a root surface comprising: a flighted region at a proximal end of the screw; a mixing section adjacent a distal end of the screw, said mixing section comprising an inlet groove having a closed distal end, a discharge groove circumferentially spaced from said inlet groove, said discharge groove having a closed proximal end, and a grooved land region comprising at least one grating land element extending between said inlet groove and said discharge groove; wherein said inlet groove and said outlet groove include an axis; wherein said grating land element includes a plurality of openings and teeth oriented generally perpendicular to said axis of said inlet and said discharge grooves, wherein said openings do not extend to said root surface; and wherein said grooved land region has a diameter that generally corresponds to that of said flighted region.