Patent ID: 8308910

Claim:
A method for manufacturing a press felt with a seam for the press section of a paper machine, the method comprising: weaving in a weaving machine in one go a one-base three-layer base fabric that comprises a web-side surface layer, an intermediate layer and further a bottom layer on the roll-side surface, weaving in the base fabric several machine direction yarns in three layers and several cross-machine direction yarns that are arranged to cross with the machine direction yarns, forming in the base fabric at least a first and a second cross-machine direction connecting end, forming at the connecting ends by means of the machine direction yarns of the intermediate layer and bottom layer several seam loops for forming a seam, fastening after weaving at least to the web-side surface of the base fabric at least one batt fibre layer, arranging the yarn density ratio of the surface layer machine direction yarns to be at least double in comparison with the yarn density of the intermediate layer machine direction yarns and that of the bottom layer machine direction yarns, respectively, using as the surface layer machine direction yarns those having an essentially smaller cross-sectional area in comparison with the machine direction yarns forming the seam loops, and arranging for the surface layer machine direction yarns a long free run over at least five cross-machine direction yarns.