| 摘要 |
The paper-making stock on a paper machine is improved by running the forming fabric, carrying the stock, as a layer of a dilute aqueous dispersion of fibers, over a modified low-vacuum suction box having a slotted cover made up of elongated blades dividing the suction area into a grid. The surfaces of some of the blades support the fabric and the surfaces of others are lowered a small amount to allow the fabric to undulate and agitate the stock without substantially changing the grid area of the drainage surface. The lower level surfaces form a fluid seal with the undersurface of the fabric.
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