The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 1997
Filed:
Feb. 02, 1996
Jarmo Laitinen, Hyvinkaa, FI;
Sunds Defibrator Loviisa Oy, , FI;
Abstract
An apparatus for length screening of elongated particles such as wood chips, having a roll set (2) formed by at least two essentially horizontal rolls, mounted parallel to each other and adapted to rotate with a gap (5) adjusted between each pair of rolls, and on which roll set the material to be screened is fed essentially orthogonally to the longitudinal axis of the rolls at the intake end of the roll set, whereafter a portion of the material to be screened falls down through the gaps (5) and a remaining portion is removed from the exit end of the apparatus. At least one of the individual rolls (4) of the roll set (2) have their circumference formed by cage bars (9) aligned parallel with the longitudinal axis of the roll, the cage bars being arranged essentially equidistantly spaced from each other so as to form a cage and the cage bars having ends being attached to flanges (8) or similar members having a circular or annular perimeter, the flanges being positioned perpendicular to the longitudinal axis of the roll and the flanges being attached to the shaft (7) of the roll.