Method to reduce forming fabric edge curl
AssigneeAlbany International Corp.
InventorsJohn M. Hawes, Joe W. Sims, Don Lee
Life of this patent
Estimating the term…
Abstract
A method for reducing or eliminating forming fabric edge curl includes slitting or scoring the knuckles formed by cross-machine direction yarns on the long-shute knuckle side of a papermaker's forming fabric. The knuckles are scored or slit to a depth no greater than half the diameter of the cross-machine direction yarns. At least one such slit or score is provided per knuckle. The scoring or slitting has the effect of bringing the ratio between the shrink forces acting on the two sides of the forming fabric in the cross-machine direction closer to unity, and, in turn, reduces or eliminates the edge curl resulting from shrinkage in the cross-machine direction.
Claims6
A method for reducing forming fabric edge curl comprising;
- maintaining a forming fabric in a substantially flat condition, said forming fabric being woven from machine-direction and cross-machine direction yarns in a pattern producing a surface on said fabric formed substantially by knuckles of said cross-machine direction yarns, said surface being a long-shute knuckle side of said fabric;
- and
- scoring a plurality of said knuckles of said cross-machine direction yarns on said long-shute knuckle side to provide each of said plurality of said knuckles with at least one slit, so that the ratio between the shrink forces acting across the two sides of the forming fabric will approach unity, whereby forming fabric edge curl will be reduced or eliminated.
Dependencies are inferred from the claim text.