A papermaking fabric has a fabric repeating unit that comprises eight top MD yarns and eight bottom MD yarns that extend in machine direction; three top CMD yarns interwoven only with the top MD yarns; three bottom CMD yarns interwoven only with the bottom MD yarns; and two pairs of binding yarns interwoven with both the top MD yarns and the bottom MD yarns; the binding yarns of each pair cross each other under respective transition yarns; the binding yarns of each pair, together, leave exposed on a top surface of the fabric only single isolated transition yarns, all separated from each other in cross machine direction by a plurality of adjacent top MD yarns.

The present invention is directed to eliminate diagonal weave lines that appear on the surface of a fabric due to warp knuckles. The present invention is also directed to provide an industrial two-layer fabric that prevents transfer marks from forming by suppressing the separation or aggregation of adjacent wefts, which has occurred in conventional pattern structures, and has excellent surface smoothness and running stability.

An industrial two-layer fabric includes an upper layer fabric including upper side warps and upper side wefts and a lower layer fabric including lower side warps and lower side wefts, and the upper layer fabric and the lower layer fabric are bound by warps that function as binding yarns.

In the industrial two-layer fabric, warp knuckles are formed on a surface side, and each warp knuckle is formed by allowing a warp to pass over a single upper side weft; in a shaft adjacent to the warp knuckle, at least two other warp knuckles are arranged in a diagonal direction in a planar view; and the warp knuckles are sequentially arranged in such a way as to form a herringbone pattern on a surface layer side of the fabric.

A forming fabric for a papermaking machine woven according to a repeating fabric weave pattern is provided. The fabric includes a PS layer having a PS surface, with the PS layer including PS warps and PS wefts interwoven in a first repeating pattern, and a MS layer having a MS surface, with the MS layer including interwoven MS warps and MS wefts. A plurality of pairs of binder weft yarns is provided, with each of the pairs of binder weft yarns comprising first and second binder weft yarns that are interwoven according to a binder weft pattern with the PS warps and the MS warps to bind the PS and MS layers together in the composite forming fabric, and each interchanges between the layers at exchange points. In each pattern repeat of the fabric weave pattern, each of the MS warps forms one or more MS warp knuckles over single ones of the MS wefts, the MS warp knuckles of the MS warps are arranged in a broken twill having an offset mirror symmetric arrangement, and a direction of the broken twill reverses after an equal number of MS warp knuckles.

A papermaking fabric for fibrous web forming or processing machines extends in MD and CD-directions and includes top and bottom fabric layers bound by binder yarns. The top layer is a web contacting side with top weave structures having interwoven first MD and first CD-yarns. The bottom layer is a machine contacting side with bottom weave structures having interwoven second MD and second CD-yarns. The top weave structure has repeats and forms fiber compression areas and fiber support areas recessed in thickness direction of the fabric relative to the fiber compression areas on the web side and fiber support areas separated by fiber compression areas or vice versa. A fiber compression area has adjacent top MD-floats on the web side or adjacent top CD-floats on the web side and a fiber support area has first MD and first CD-yarns interwoven in plain weave.

A triple papermaking fabric, having at least one fabric repeat unit which comprises: a set of sixteen warp yarns or MD yarns, which extend in machine direction and are subdivided into eight top MD yarns eight bottom MD yarns; three top CMD yarns interwoven only with the top MD yarns form a top fabric layer; three bottom CMD yarns interwoven only with the bottom MD yarns to form a bottom fabric layer; three binding yarns interwoven with both the top MD yarns and the bottom MD yarns so as to bind the top layer to the bottom layer; the fabric has a ratio between weft yarns and warp yarns of 3:1.

A sheet-forming wire with a lower fabric layer formed from a multiplicity of identically constructed lower weave repeats, each of which contains longitudinal threads extending in the lower fabric layer, and lower cross threads, with the lower cross threads extend only in the lower fabric layer. The lower cross threads are tied into the lower fabric layer in each case by exactly two longitudinal threads extending in the lower fabric layer, in that each particular lower cross thread is run under by a first longitudinal thread at a first tying-in point (x) and is run under by a second longitudinal thread at a second tying-in point (x). The lower cross threads form first lower cross threads (I) and second lower cross threads (II). The first lower cross threads form a shorter float on the running side than the second lower cross threads.

A paper machine screen which is formed as a transverse thread-bound, multi-layer fabric. Binding transverse threads extend respectively both in an upper fabric layer and in a lower fabric layer and hereby bind the lower fabric layer to the upper fabric layer. The binding transverse threads form functional transverse thread pairs within the total repeat, the transverse threads of which alternately complete the first weave. In the total repeat, the functional transverse thread pairs in the upper fabric layer are arranged in groups of respectively two or more functional transverse thread pairs arranged directly one after another, when seen in a longitudinal direction.

A woven-fabric web, such as a forming fabric or forming wire, for a machine for producing and/or processing a fibrous web, has a first woven-fabric layer with first longitudinal threads and first transverse threads interwoven with the first longitudinal threads and a second woven-fabric layer with second longitudinal threads and second transverse threads interwoven with the second longitudinal threads. The weaving pattern of the fabric is repeated in pattern repeats. The first and second longitudinal threads are arranged in a plurality of groups in each pattern repeat, with a first group and a second group and at least one further of the first and/or second group. Each first group is formed from a first longitudinal thread and a second longitudinal thread arranged below the first longitudinal thread and the first and second longitudinal threads in each group are arranged at no offset or only a slight offset in plan view.

A fabric tape or forming wire for a fibrous web manufacturing or processing machine, includes an upper fabric layer having upper longitudinal threads and interwoven first crossthreads, and a lower fabric layer having lower longitudinal threads and interwoven lower crossthreads. The fabric layers are stacked and the weaving pattern of the tape repeats. A ratio of upper to lower longitudinal threads in a repeat is smaller than one. The upper and lower longitudinal threads in each repeat are in first and second groups. Each first group is formed by an upper longitudinal thread and two lower longitudinal threads thereunder. Each second group is formed by an upper longitudinal thread and a lower longitudinal thread thereunder. In a perpendicular projection onto the fabric layers, the upper and lower longitudinal threads in each group are not or slightly offset forming a maximum free space of a half upper longitudinal thread diameter therebetween.

An endless-woven dryer fabric for a papermaking machine includes: a plurality of upper warp yarns; a plurality of lower warp yarns; and a plurality of weft yarns interwoven with the plurality of upper and lower warp yarns in a series of repeat units. Each weft yarn includes upper and lower portions, the upper portions interwoven with the upper warp yarns, and the lower portions interwoven with the lower warp yarns. The upper portion of each weft yarn includes a first seam loop and the lower portion of each weft yarn includes a second seam loop. The first and second seam loops of the weft yarns are interdigitated to form a seam, the seam receiving a pintle so that the fabric forms an endless loop.