Apparatus for dry defibration of sheets of fibrous cellulose...

Details Apparatus for dry defibration of sheets of fibrous cellulose... Apparatus for dry defibration of sheets of fibrous cellulose...

D - Textiles, Paper

21

F

92/52

D21F 1/00 (2006.01) D21B 1/06 (2006.01)

Patent

CA 1244698

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.

484530

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