Abstract: A double-layer fabric for the sheetforming section of a papermaking machine which is referred to as a sheet forming fabric or a dewatering fabric consists of an upper layer (1) of transverse threads (3) and a lower layer (2) of transverse threads (4) and (8) which are interwoven with a single system of longitudinal threads (5). Successive transverse threads (4, 8) of the lower layer (2) form pairs and within each pair the lowest points (7) of the transverse thread floats (6) are in alignment. The lowest point (7) of the float of the one transverse thread (4) of a pair is offset from the center of the float (6) in the direction opposite to the direction in which the lowest point (7) of the float (6) of the other transverse thread (6) is offset.

Abstract: A double-layer fabric for the sheet-forming section of a papermaking machine includes an upper layer of transverse threads, a lower layer of transverse threads, and a single system of longitudinal threads which are interwoven with both layers of transverse threads. The transverse threads of the lower layer are woven in pairs in parallel and the transverse threads of the upper layer are positioned above respective pairs of transverse threads.

Abstract: The fabric for the sheet forming section of a paper making machine includes a double-layer or multi-layer fabric of interwoven longitudinal and transverse threads and additional transverse threads floating on the paper supporting side. The additional transverse threads are interwoven in a plane disposed below the plane formed by the transverse threads of the paper supporting side. The additional transverse threads preferably have a smaller diameter than the ordinary transverse threads.

Abstract: A fabric for the sheet forming section of a papermaking machine includes a double-layer or multi-layer fabric of interwoven longitudinal and transverse threads and additional transverse threads floating on the paper side. The additional transverse threads have a greater repeat length than the ordinary transverse threads and alternatingly float in one weave repeat on the paper side, while in the next weave repeat they are interwoven in the fabric interior. The additional transverse threads preferably have a smaller diameter than the ordinary transverse threads.

Abstract: A fabric for the sheet forming section of a papermaking machine comprising two layers of transverse threads and longitudinal threads interwoven with both layers of transverse threads. Both the paper side and the running side have a transverse structure, and the number of transverse threads in the upper layer is twice as high as that in the lower layer. The longitudinal threads interweave twice in each repeat with the upper layer and with the lower layer. Interweaving with the upper layer is effected one time with a transverse thread laying directly above a transverse wire of the lower layer and the other time with a transverse thread disposed between and above two transverse threads of the lower layer.

Abstract: A papermachine fabric for the production of tissue paper or porous batts has a two layer fabric comprised of a fine upper fabric layer and a coarser lower fabric layer. Both fabric layers have a large open area. The two fabric layers are firmly interconnected so that the upper fabric layer exhibits depressions at the sites of interweaving which are distributed in the manner of a pattern. The papermachine fabric is especially suited as an embossing fabric for after drying the paper web coming from a sheet forming fabric or as a second sheet former of a twin wire former.

Abstract: A fabric for the sheet forming section of a papermaking machine is comprised of an upper and a lower layer of transverse threads interwoven with longitudinal threads. The number of transverse threads in the upper layer is twice as high as that in the lower layer. Within each weave repeat each longitudinal thread is interwoven two times with the upper layer of transverse threads. The transverse threads of the upper layer and the longitudinal threads form crimps disposed in the paper plane. First transverse threads in the upper layer form crimps reaching up to the paper plane which are supported in a crimp saddle of a longitudinal thread, and second transverse threads in the upper layer alternating with the first transverse thread form crimps reaching up to the paper plane which are supported by two adjacent longitudinal threads one of which ascends from the fabric interior to the paper plane while the other one descends from the paper plane into the fabric interior.

Abstract: A method for mending a damaged area in a papermachine fabric includes filling the defective area with a photosensitive resin, irradiating the defective area with ultraviolet light through a first mask having a multiplicity of light impervious dots in order to crosslink the irradiated regions and rinsing away the non-crosslinked regions of the photosensitive resin. The patch produced in this way is firmly bonded to the fabric of the papermachine fabric and also has a permeability sufficient for dehydration of the paper pulp.

Abstract: A sheet forming fabric with reinforced margins is provided on its backing side with a fabric strip in the marginal regions. The fabric strip can have a double layer structure with transverse threads arranged at least partially in pairs one over the other and with longitudinal threads. The fabric strip has a pronounced longitudinal filament structure on the backing side and is fastened to the fabric by stitching. The sewing thread takes the place of a longitudinal thread of the fabric strip previously removed from or omitted during weaving of the fabric.

Abstract: A spiral link belt for the manufacture of paper has a multiplicity of mutually parallel helices with the windings of successive helices intermeshing in the manner of a zipper, and pintle wires are inserted into the channels formed by the meshing windings. The belt edges are covered by a protective cover consisting of a fabric wrapped about the belt edges and fastened to the spiral link belt. The protective cover can be a double-layer fabric and can have a seven or eight harness weave in which the longitudinal threads pass over four or five transverse threads or pairs of transverse threads.

Abstract: A papermachine fabric comprises a spiral link belt covered with a sheet of non-woven fabric with the fiber ends being entangled with the elements of the spiral link belt. The non-woven fabric is bonded to the spiral link belt by a multiplicity of fine high pressure fluid jets. In the manufacture of the papermachine fabric the fluid jets are preferably arranged in a predetermined pattern which is produced by interposing a sheet with apertures arranged according to said pattern between the fluid nozzles and the non-woven fabric.

Abstract: A papermachine clothing comprising a fabric whose weave pattern does not have an axis of symmetry in the length direction, and which has in at least a portion of one fabric half a weave mirror-symmetrical to that in at least a portion of the second fabric half and wherein, along the line of contact of the mirror-symmetrical regions, corrective longitudinal wires are interwoven to prevent excessively long floats of the transverse wires on the running side.

Abstract: A clothing for use in a papermaking machine wherein the fabric includes two or more fabric layers, each layer comprised of woven structural longitudinal and transverse threads and each interconnected by additional transverse binder threads, and wherein at least the structural transverse threads of the lower fabric layer jointly interwoven with the transverse binder threads are arranged in pairs or as twin threads.

Abstract: A composite fabric for use as a clothing in paper-making machines comprising a plurality of interconnected fabric layers, each fabric layer having interwoven longitudinal wires and transverse wires and the fabric layers being interconnected in that at least part of the transverse wires of one or both of two adjacent fabric layers are interwoven with the longitudinal wires of the other fabric layer, the interweaving of the transverse wires of the one fabric layer with the longitudinal wires of the other fabric layer being such that the course of the transverse wires of the one layer and the other layer are interchanged.

Abstract: A double-layer woven fabric comprising longitudinally extending warp wires and two layers of transversely extending weft wires, at least part of the warp wires being interwoven with weft wires of both weft layers and warp wires, separated by not more than one intermediate warp wire, extending pair-wise in parallel at least over part of their length on the paper side and/or on the running side of the fabric.

Abstract: A composite fabric comprising at least two fabric layers interconnected by transversely or by longitudinally extending threads and wherein at least a part of the transversely extending and at least a part of the longitudinally extending interconnecting threads are woven both into the upper and into the lower fabric layer.

Abstract: A composite fabric for use as clothing for the sheet forming section of a papermaking machine, which fabric comprises at least two fabric layers (1, 2) interconnected by binder threads (4, 5), and wherein part of the binder threads (4, 5) extend in the warp and weft directions and the threads form an elastic interlayer (3) and wherein each binder thread (4, 5) is interwoven with not more than one of the at least two fabric layers (1, 2).

Abstract: A two-ply screen for the sheet forming zone of a papermaking machine comprises weft filaments arranged in pairs one over the other and warp filaments with all the warp filaments being woven into the top layer of the screen. Only part of the warp filaments are woven also into the bottom layer of the screen. The number of warp filaments in the top fabric layer serving to form the paper sheet is twice that contained in the bottom layer. The lower weft filaments are at least 20% and preferably at least 30% thicker than the warp filaments.

Abstract: A shedding apparatus for the circular weaving of multi-harness fabrics includes a plurality of heddle frames for weaving a multi-ply screen of the type suitable for use with a paper making machine. Each heddle frame has a warp wire from each fabric half drawn therethrough and a divider wire is located between the heddle frames and the reed. The divider wire extends across the entire width of the fabric with all of the warp wires of the upper fabric half extending above the wire divider and all of the warp wires of the lower fabric half extending beneath the wire divider so that upon weaving of one fabric half the divider wire is raised or lowered so that the warp wires of the other fabric half are urged away from the shed by the wire divider. A compensator rod may be provided between the heddle frames and the warp beam to compensate for the tension placed on warp wires due to different path lengths for the warp wires as caused by the wire divider.

Abstract: A spiral linkage belt comprising a multiplicity of intermeshing plastic helices, with the windings of each helix penetrating into the windings of the adjacent helix so that the helices form passageways, and pintle wires extending through each passageway to connect the helices, the spiral linkage belt further including a fabric of interwoven structural warp wires and weft wires connected to the helices.