Abstract: A plate for a separator for the successive seizure and separation of threads held in an array has a leading edge and at least one hook-shaped recess in the leading edge. The recess has a depth in the direction of plate movement which is greater than half the width of the recess. Between a hook tip and the leading edge there extends a fender edge at an angle of 15.degree. to 90.degree. relative to the direction of plate movement. The hook tip is rounded with a radius of up to 10% of the width of the hook-shaped recess.

Abstract: A papermaking fabric and method therefor is disclosed which may be used as a support fabric or a carrier fabric for paper material on a papermaking machine. The fabric, designated generally as (A) includes a first layer (B) of longitudinal yarns (32, 34, 36, and 38) extending in a machine direction. A second layer (C) of longitudinal yarns (42, 44, 46, and 48) is included in the fabric vertically spaced from the first layer. The longitudinal yarns of the first and second layer form stacked pairs (52, 54, 56, and 58) which reinforce the fabric in a machine direction to enhance its stability. At the same time, the stacked pairs may be spaced apart in a cross-machine direction sufficiently to provide a desired degree of openness and fabric permeability. Fabric openness in the range of thirty percent or more of the total fabric area can be had in accordance with the fabric of the present invention without sacrificing the structural stability.

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: An apparatus for the selective feeding of one of a plurality of weft threads (1) to a gripper projectile, which moves along a projectile path (2), includes a plurality of displaceable feeders (3) each having a feeder clamp (7) for retaining a respective weft thread (1) in position for pick up, a knife (4) for cutting off the weft thread (1) after it has been drawn into the weaving shed by the gripper projectile, and a clamp for picking up the weft thread (1) from a feeder and drawing the weft thread (1) transversely across the projectile path (2) for engagement by the gripper projectile. The clamp is mounted on a rotatable ring (6) which is disposed perpendicular to the projectile path (2) which extends through the ring.

Abstract: A picking device for the picking motion of a loom uses a pull string for delivering the picking energy to a pivot arm which is capable of being tensioned by way of a cam drive. The pull string can in principle be any elongate structure, e.g. a pull string of steel or a rope of high tenacity aramide fibers. The cam drive includes a toggle lever which is extended by a first cam and urged somewhat beyond its dead center, and which is urged by a second cam back over the dead center to initiate picking. A decelerating string is connected to the pivot arm to decelerate the pivot arm at the end of the pick.

Abstract: A separator for successively seizing threads (14) held in an array (28) includes a frame (10) having a front face or recess gap (12) and in which two or more strap or bar needles (15, 16, 18) are slidably disposed side by side. Each needle is provided with a pair of facing hooks (20, 22; 24, 26) at opposite sides of a cutout in its forward edge for cooperatively seizing a single thread for separation when the needles are driven in opposite directions.

Abstract: An auxiliary device for a seam weaving machine for joining the ends of flat-woven fabrics by a woven seam couples each auxiliary warp thread to a tensioning string. The auxiliary device includes a barbed needle in a guide sleeve with the barbed needle having at one end a barb for seizing an auxiliary warp thread and holding it between the needle and the sleeve. The needle is connected at the other end to a tensioned string. A storage plate is provided having bores for receiving the coupling devices.

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: The method produces a flat spiral link assembly from at least four synthetic resin monofilament helices wound winding to winding which are simultaneously supplied for meshing engagement. Before being meshed the helices are stretched to at least three times their length and are thermoset in stretched condition. The alternatingly right-hand and left-hand helices are caused to mesh in zipper fashion and are interlocked by pintle wires. In order to facilitate the insertion of the pintle wires the helices are extended by about five percent. The apparatus for performing the method comprises two feed rolls forming a first roll nip through which helices are passed to a heating chamber. Draw-off rolls withdraw the helices from the heating chamber at least at three times the peripheral speed of the feed rolls. The apparatus also comprises a shunt for joining the helices and a device for inserting the pintle wires.

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 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 pneumatic picking mechanism for weaving shuttles wherein the weaving shuttle is driven by a piston moved in a cylinder cavity by pressurized gas and wherein the pressurized gas is supplied from a reservoir through a main valve to the cylinder cavity and the main valve is controlled via a control valve assisted by an auxiliary valve.

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.