Method and apparatus for fiberizing fibrous sheet

Details Method and apparatus for fiberizing fibrous sheet Method and apparatus for fiberizing fibrous sheet

B - Operations, Transporting

02

C

241/122

B02C 18/16 (2006.01) D21B 1/06 (2006.01)

Patent

CA 1247584

ABSTRACT: A fiberizer for disintegrating fibrous sheets and a method of fiberizing using a rotor having peripheral teeth arranged within bands which extend transversely around the rotor axis is disclosed. The tooth pattern in each band is circumferentially extending and shaped approximately in a sinusoidal wave on the rotor periphery extending in the direction of rotation, and providing a substantially sinusoidal distribution of impacts against a sheet fed to an anvil in the form of simple harmonic motion along a cross direction impact line adjacent the anvil and thus transversing impacts within adjacent strips of the sheet corresponding to the bands. Individual points along the width of the fibrous sheet are periodically impulsively loaded by the impacts when they are at a period of highest response, i.e., when the initial stress level has been increased to the highest optimal stress without causing fiber damage, and producing mechanical disturbances within the sheets which cause vibrations and break interfiber bonds so as to precondition the sheet as it is fed to the anvil.

500124

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