Abstract: A single layer paper machine screen fabric having longitudinal and transverse threads characterized by the fact that either the longitudinal or the transverse threads are positioned to change the direction of their course diagonally in the plane of the fabric. The center line of such threads is offset from the direction of their course by at least half the thread diameter.

Abstract: A single-ply paper machine wire having a top side and a bottom side and including longitudinal machine direction threads and cross-threads, comprising a first group of cross-threads having at least one pattern repeat comprising differential lacing interwoven with a maximum of five longitudinal threads for forming said top side of said wire; a second group of cross-threads, each thread of said second group of cross-threads disposed between a pair of threads of said first group of cross-threads; said second group of cross-threads having at least one pattern repeat interwoven with at least six longitudinal threads; said second group of cross-threads pattern repeat floating under at least five of said longitudinal threads on said bottom side; and, said longitudinal and said cross-threads being synthetic is disclosed.