Paper making and fiber liberation – Apparatus – Slurry supply conditioning or condition maintaining
Patent
1978-06-26
1979-12-18
Fisher, Richard V.
Paper making and fiber liberation
Apparatus
Slurry supply conditioning or condition maintaining
137207, 138 26, D21F 106
Patent
active
041793323
ABSTRACT:
Apparatus for damping pressure and consistency perturbations occurring in the pulp suspension flow to the headbox of a paper making machine including an enclosed damping tank defining therewithin a space for a volume of air and a space for the pulp suspension such that the pulp suspension and the air volume have direct interfacing contact. Longitudinally extending distribution and collecting header means are disposed within the tank for conducting the flow of pulp suspension into and out of the tank, respectively. Each of the distribution and collecting header means define a flow passage for the pulp suspension, which passages fluidly communicate with the pulp suspension space within the damping tank through an elongate, continuous slit. Damping or attenuation of the pressure perturbations in the pulp stock flow is achieved through the interaction of the surface of the pulp stock with the air volume while the consistency perturbations are damped through the action of a plural delay principle.
REFERENCES:
patent: 2896862 (1959-07-01), Bede
Ilmoniemi Erkki
Kokkonen Olavi
Fisher Richard V.
Valmet Oy
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