Abstract: An optical paper sorting system uses diffuse reflectance to identify a sheet of paper, conveyed on a conveyor, as either white or groundwood grade, or white, colour, or mixed grade. In sorting, paper that does not meet a specified minimum requirement, for example, having less than a maximum amount of lignin, is mechanically diverted from a stream of input paper waste to a rejection bin. Otherwise, the paper is directed to a collection bin. The optical paper sorting method may be used to sort paper into different grades that is then recombined to produce a predetermined grade of sorted waste paper.
Type:
Application
Filed:
May 11, 2007
Publication date:
June 18, 2009
Applicant:
Hanaar Corp.
Inventors:
Sheldon Greenspan, Jose Sequeira, James Arthur Daniels