Patent ID: 9528222
Filing Date: 2016-12-27
CPC Classification: B02C,D21B,D21D

Claim Text:
1. A feed screw for feeding lignocellulosic material to a rotary disc refiner comprising a pair of opposed grinding surfaces, said feed screw comprising at least one peripheral thread for feeding said lignocellulosic material axially along said feed screw towards said rotary disc refiner, said at least one peripheral thread including an upstream end and a downstream end corresponding to the pair of opposed grinding surfaces whereby said feed screw feeds said lignocellulosic material from said upstream end toward said downstream end through the center of one of said pair of opposed grinding surfaces, said downstream end of said at least one peripheral thread including an angled end member directly affixed to and disposed at an angle with respect to said at least one peripheral thread whereby said lignocellulosic material is re-directed in a radial direction as it leaves said at least one peripheral thread.