HEADBOX DAMPING DEVICE FOR A PAPER MAKING MACHINE

摘要

The present invention provides means for damping pressure and consistency disturbances in the pulp suspension flow going to the headbox of a paper machine, comprising a damping tank to receive a pulp stock flow having a free interface with an enclosed air volume, the pulp stock flow being carried into this tank by means of a distribution header and conducted out therefrom by means of a collecting header according to a plural delay principle causing attenuation of consistency perturbations at least, said distribution header and said collecting header being disposed within the damping tank and passages constituting the distribution header and the collecting header open through a substantially continuous slit into the pulp stock space of the damping tank.