Patent ID: 6773553
Filing Date: 2004-08-10
Classification: D21F,Y10S,Y10T

Abstract:
A method of making a press felt, comprising:forming a base fabric, which comprises at least two superimposed components, the first of which is a web-side surface component and the second is a base component; weaving the base component of warp and weft yarns and providing a first and a second transverse jointing edges of the base component with seam loops of the weft yarns for interconnection; assembling the press felt into a closed-loop piece by arranging the jointing edges of the base fabric edge on edge, whereby the jointing edges form a seam area, where the seam loops intermesh and form a seam loop channel in the transverse direction of the press felt, and a seam yarn, which interconnects the jointing edges, is inserted in the seam loop channel; extending the surface component at a first jointing edge of the base fabric for a predetermined distance longer than the base component in the longitudinal direction of the press felt, whereby a seam flap extending over at least the seam area of the base component is provided at the first jointing edge when the base fabric is formed; extending the base component at a second jointing edge of the base fabric for the length of the seam flap longer than the surface component; binding the surface component and the base component together before attaching at least one batt fibre layer on the base fabric; forming a free outer end to the seam flap; and needling the batt fibre layer on the base fabric provided with the seam flap and providing the batt fibre layer at least on the base fabric surface facing a web to be dried.