Patent ID: 8048272

Claim:
A washer for washing and dewatering cellulosic pulp material comprising a rotary drum, a plurality of axial compartment walls disposed on said rotary drum defining a plurality of axial compartments therebetween, a stationary cylindrical casing enclosing said rotary drum thereby defining a ring-shaped space between said stationary cylindrical casing and said rotary drum, and a plurality of axially extending seals dividing said ring-shaped space into a forming zone for forming said cellulosic pulp material, at least one washing zone for washing said cellulosic pulp material under an overpressure, and a discharge zone for discharging said washed cellulosic pulp material, a plurality of positioning cylinders corresponding to said plurality of axially extending seals for adjusting the radial position of said plurality of axially extending seals, said plurality of positioning cylinders attached to said corresponding plurality of axially extending seals for articulation therebetween for oblique positioning of said corresponding plurality of axially extending seals with respect to said rotary drum.