Wood chip screening and processing methods and apparatus

Abstract From the Canadian patent

A system for separating and classifying whole tree wood chip material comprising essentially wood and bark overs chips and bark fines which is supplied to a bin or receptaole. The chip material is augered in a forward direction in a monitored flow longitudinally away from the bin while passing it across a first stationary screen trough system having openings of a size to pass everything, while rejecting the overs. The acceptable chips and fines passed through the first screen trough system are then augered across a second stationary screen trough system having openings of a size to pass the fines to a fines trough, while retaining the acceptable chips. Finally, the acceptable chips are …