Patent ID: 9260819
Filing Date: 2016-02-16
CPC Classification: D21F

Claim Text:
1. A papermaking press felt comprising a base fabric consisted of a woven fabric having a warp-weft texture structure that comprises an upper warp yarn on a wet paper web side of the fabric, a lower warp yarn on a running surface side thereof, and weft yarns interwoven in such a manner as to be intertwined with both the upper and the lower warp yarns, the upper warp yarn being interwoven in a number of pieces larger than the lower warp yarn, wherein the base fabric has, in a unit texture, at least one upper knuckle portion in which the weft yarns bend so as to pass along the upper side of only one piece of the upper warp yarn and at least one lower knuckle portion in which the weft yarns bend so as to pass along the lower side of only one piece of the lower warp yarn, and each weft yarn forms the at least one upper knuckle portion and the at least one lower knuckle portion and a difference between a maximum value and a minimum value of an interval between the upper knuckle portion and the upper knuckle portion, an interval between the upper knuckle portion and the lower knuckle portion, or an interval between the lower knuckle portion and the lower knuckle portion is a value corresponding to 1.0 piece or less of the upper warp yarn, wherein the lower knuckle portions of the base fabric are distributedly arranged as a pair of two adjacent ones shifted from each other by an interval corresponding to one piece of the lower warp yarn.