Importance

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Abstract

A method of manufacturing a double-layered fabric designed for use in a papermaking, cellulose or board manufacturing machine by a round-weaving technique involves the weaving of an endless weft thread with a plurality of warp threads. Seam loops are formed at the two ends of the fabric by weaving the endless weft thread around a seam thread during the weaving process. In this process, the plurality of warp threads are on one side of the seam thread. The fabric has a first side for supporting fibrous web material to be dewatered and an underside, and the endless weft thread is alternatively disposed on the first side and on the underside of the fabric with each pass around the seam thread. The method includes the improvement wherein the endless weft thread is woven with at least one extra warp thread adjacent to the seam thread when the endless weft thread is on the first side of the double-layered fabric. The at least one extra warp thread is on the other side of the seam thread from the plurality of warp threads. As a consequence, a type of extension of the regular thread system of the fabric is formed in the seam zone to conform the loop seam to the rest of the fabric, thereby to avoid markings in a paper web at the loop seam.

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First Claim