Papermaking fabric seam with seam flap or extension

A woven fabric for a papermaking, cellulose or board manufacturing machine, said fabric being woven from a longitudinal thread system and a transverse thread system, and having a first side for supporting fibrous web material to be dewatered, said fabric comprising:

• a plurality of seam loops provided along each one of two end edges of the fabric and to be included in a loop seam to form an endless woven fabric, said seam loops being formed by said threads of said longitudinal thread system, and said loop seam being formed by directing a pintle through a passage formed by interdigitating said seam loops at said two end edges with one another;
• and,
• at least at one of said end edges, at least one string of material, which is extended substantially parallel to said at least one end edge adjacent said transverse thread system of the fabric and which is joined to only such portions of said seam loops as are facing said first side of the fabric by interweaving with said threads of said longitudinal thread system forming said seam loops only on said first side of said fabric,
• wherein said portions of the seam loops are located at a distance--seen in a direction of thickness of the fabric from a main surface of the fabric which is located on said first side, and wherein said string of material bridges said distance to form an extension of said main surface.