Abstract: A helical coil seam construction for joining the ends of a length of papermakers fabric into a continuous loop is disclosed using a pair of generaly helical coils formed of a multifilament yarn subjected to a stiffening treatment with that stiffened yarn being formed into a helical coil. A first such coil is affixed to a first end of a length of papermakers fabric and a second coil, wound in the direction opposite to the winding of the first coil, is affixed to a second end of the fabric, opposed to the first end. Means are provided for releasably joining the coils with the loops thereof in an interengaged relationship, whereby the ends of the fabric are releasably joined to form a continuous loop of the fabric.

Abstract: A pin seam construction in which cross direction yarns in the area proximal the seam have a cross sectional size greater than the size of the cross direction yarns appearing in the body of the fabric to provide a weave portion of greater thickness proximal the pin seam to protect the seam in use.

Abstract: A method and an apparatus for avoiding periodic non-uniformities in papermaking felts by varying the width of the web going into a cross lapper.