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:
Mar. 04, 2003
Filed:
Apr. 10, 2000
John Dorscht, Kitchener, Ontario, CA;
Other;
Abstract
A shredding apparatus comprises a plurality of rotatable rolls, each one of the rolls being rotatable around an axis of rotation in a first direction of rotation or a second direction of rotation. Each roll further has a plurality of angled replaceable teeth, which are arranged in at least one first set of teeth arranged in a first helical line across an outer surface of each roll, circumferentially spaced apart a first angle and facing the first direction of rotation. Further, at least one second set of teeth is arranged in a second helical line across the outer face of each roll, circumferentially spaced apart the first angle and facing the second direction of rotation. The first helical line and the second helical line of teeth are arranged to axially (in the longitudinal direction of the rolls) move material to be shredded when the rolls are rotated. Further, the shredding apparatus has a frame structure with roll holding means, for journalling the plurality of rolls in a spaced apart relationship to form a bed of rolls. The frame structure is surrounded by an enclosure provided with a charging opening for material to be shredded and a discharging opening for shredded material. A reversible drive means supplies rotation force to rotate the plurality of rolls, and a plurality of gear means, arranged one for each roll, transfers the rotation force from one roll to an adjacent roll so that adjacent rolls rotate in opposite directions of rotation.