Back to results
US 4,532,009 AGranted
Forming board elements
AssigneeAlbany International Corp.
InventorLeslie F. Nickerson
Life of this patent
Estimating the term…
Abstract
The present invention discloses forming board elements for paper-making machines. The elements are provided with notches on their leading edges for generating longitudinal waves on the forming fabric. These waves induce transversal shear forces within the stock to break up fiber flocs which form within or downstream from the headbox.
Claims14
A continuous papermaking apparatus comprising
- a forming fabric moving in a continuous loop;
- means for depositing stock on the forming fabric comprising particles or fibers in suspension;
- and
- forming board elements disposed transversally and successively under said fabric, each of said forming board elements having a top surface with a leading edge and a trailing edge in contact with said forming fabric and a leading side surface disposed transversally to the direction of movement of said fabric upstream of and generally at an acute angle to said top surface thereby draining water from said stock, and a plurality of notches extending from said leading side surface to a point between said leading and trailing edges on said top surface to force a portion of the drained water back into the stock;
- whereby any flocs formed in said stock are dispersed in the transversal shear generated by said waves.
2 more elements
Dependencies are inferred from the claim text.