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:
Jun. 16, 1987
Filed:
Jun. 18, 1985
Fameccanica S.p.A., Sambuceto di San Giovanni T., IT;
Abstract
Apparatus for the dry defibration of sheets of wood pulp cellulose and like materials comprises a tubular casing to which the sheets to be defibrated are fed substantially radially and a cylindrical rotor rotatably mounted within the casing substantially coaxially of the casing itself. The rotor has external teeth for impinging on the material to be defibrated. The rotor is constituted by a plurality of externally toothed discs and spacer members connected together in a pack in an arrangement in which the spacer members alternate with toothed discs. The general plane of each disc is at a predetermined angle to planes perpendicular to the axis of rotation of the rotor whereby, during rotation, the periphery of each disc describes a respective substantially cylindrical surface coaxial with the axis of rotation of the rotor. The distance between adjacent toothed discs and the angle of inclination of the discs are selected so that the substantially cylindrical surfaces described by adjacent discs at least touch each other.