Abstract: A seam for a papermakers wet press felt having a flat woven base fabric with the crimped yarns oriented in a lengthwise or machine direction. Orientation of the crimp in the machine direction lends itself to an analysis of the crimps per square inch based upon the crimp length and warp end count. Utilizing the crimps per square inch figure, it is possible to establish the approximate minimum length of the join in the machine direction. The machine direction length, in inches, of the join area is approximated by the equation: approximate joined length equals 500 divided by the crimps per square inch in the repeat pattern of the woven base fabric.

Abstract: A papermaker's multilayer fabric having at least top and bottom layers of machine direction yarns which are interwoven with cross machine direction yarns systems to establish a first interwoven fabric layer which is bound to a bottom layer fabric with the two being united by interweaving cross machine direction yarns from the bottom fabric layer in the upper fabric layer. The effective pressing surface area of the first fabric layer being equal to or greater than (x+1)+(0.5y). Wherein (x+1) defines the contribution of the upper fabric layer to the effective pressing surface area and the contribution of the binding yarn is defined by the y factor of the equation. Accordingly, the total effective pressing area is defined by the contributions of the upper ply and the binding yarns.