Abstract: A composite papermaking fabric including an upper fabric upon which a fiber suspension will be deposited for producing paper and a lower fabric or running surface being driven by the papermaking machine. The upper and lower fabrics are connected by binding threads. Use of separate, independent binding threads or binding threads which are only a part of the upper layer is replaced by the interweaving of fabric-born threads which are an integral part of the lower fabric and fabric-born threads which are an integral part of the upper fabric. Relative slippage between the upper and lower fabric layers is eliminated or decreased and the strength of the connection is increased. The marking of the paper is decreased. The fabric-born threads of one fabric layer cross the fabric-born threads of the other after at least one length of weave pattern.

Abstract: The invention relates to a method for the manufacture of impermeable, flexible, elastical bands having a smooth inner surface and consisting of a plastic fabric, including spiral bands and mats of threads, which bands are especially suited for use in connection with an extended nip of wet presses of paper making machines. These bands are used as press bands or press coates and are manufactured by applying a mixture of a prepolymer, especially polyurethane, in a flowable consistence to an endless fabric band and joining that mixture thereto, which band is transported over a reverting roll device and is coated by means of at least one nozzle on its outer surface with the flowable prepolymer mixture.

Abstract: The invention is directed to a method of manufacturing an insertion-type seam for making a cloth belt, especially a wire cloth, endless, in which the warp ends of each cloth side are interwoven with an auxiliary warp strip, and to a seaming machine for carrying out the method.

Abstract: A forming fabric for the wet end of a papermaking machine comprising a one-layered or multi-layered weave of metal or plastic and having in the region of its edgesided highly abrasive area an enforcement against abrasion by wearing. This enforcement is applied to the surface of the forming fabric and fixed thereto in form of an abrasive material so that the manufacture of the enforment can be carried out after weaving and fixed the fabric or after it has been cut and seamed.

Abstract: A double fabric produced by a forming wire for the wet end of a paper making machine. The double fabric has two sets of longitudinally directed threads and at least one upper and one lower layer of cross threads. The first set of longitudinal threads are woven with the upper layer cross threads. The second set is woven with the lower layer of cross threads, as well as partly with the upper layer to form a woven pattern.

Abstract: A papermaking wire of double layered fabric, consisting of a set of warp threads, yarns in machine direction, and a set of weft threads on the running side of the wire, yarns in cross machine direction, as well as a set of weft threads on the paper side of the wire, the last one consisting of at least two groups of weft threads differing from one another with respect to the outwardly located length of floatings. In order to avoid an unacceptable decrease of the stability of the wire and avoid markings in the paper as well as an essential reduction of drainage of the wire, if the number of cross threads on the paper side is increased, the wire is configurated such that it includes three groups of cross threads A, B, C on the paper side. Within one weave pattern each warp thread is transversing three weft threads succeeding one another on the paper side and running thereafter between the weft threads on the paper side and on the running side interlacing at least one weft thread on the running side.

Abstract: The invention is directed to a method of manufacturing an insertion-type seam for making a cloth belt, especially a wire cloth, endless, in which the warp ends of each cloth side are interwoven with an auxiliary warp strip, and to a seaming machine for carrying out the method.

Abstract: Process for the manufacture of stretch resistant, liquid impermeable, flexible press bands, in particular for dewatering presses of paper-making machines.

Abstract: The invention concerns a thread separator for seaming machines, especially the seaming of dewwatering webs, drying webs, felts and so on. The object underlying the invention consists therein to optimize the reliability of the function of the thread separator by configuring their gripper needles such that the singling out of each foremost thread of a row of warp threads of the web is ensured and each piercing and taking with of the following thread is avoided. It is proposed to construct the gripper needles as separator needles, providing them with special hooks, of which at least two are located with respect to the upper side and the lower side of the web strip related to the row of threads in the same or parallel level opposite to one another, the tips thereof being directed to the opposing thread surface, respectively. The separator needles are provided with concave apertures adpated to the diameter of the thread which is to be separated on grasping it.

Abstract: The invention concerns a fabric for use in papermaking machines as the forming wire as well as for the basic fabric for the coated, impermeable bands and belts for extended nip presses and for forming roll coatings. A fabric of such a kind will be provided such that its stability in cross direction is increased, its resistance against unravelling even at high service pressures existing in the press nip of extended nip presses is increased and its abrasive resistance is improved. These objects are attained by the fact that at least a part of the longitudinal threads and/or cross threads of the fabric consist of a mixed polymer the main components thereof are a polymer having a high molecular weight corresponding to a viscosity of at least 0.75 as well as a copolymer with a high molecular weight corresponding to a viscosity of at least 0.80, wherein the percentage of the copolymer within the mixed polymer is 2% to 20%.

Abstract: A composite paper making wire (a generic term for a paper making fabric) as a sheet forming part of a paper-making machine includes an upper fabric layer and a lower fabric layer which are interconnected by longitudinally directed or cross directed connecting yarns of synthetic material. By utilizing the cross directed connecting threads the different cross contractions of that wire are restricted, but not the relative movements between the upper fabric layer and the lower fabric layer in the running direction of the machine as caused by the pertinent load changes on passing the rolling system of the wet part of the paper making machine. These movements destroy the binding threads by wear. Therefore, it is desirable that the composite wire be constructed to be suited for taking over existing tensions in longitudinal and cross-ways directions created by the roller in the paper making machine.

Abstract: The invention relates to a method of the manufacture of dimensionally stable, liquid-impermeable, flexible press bands, particularly for wet presses of paper making machines. With known manufacturing methods for such press bands, the provision of a structured surface for liquid discharge on the outer surface of the press band, which faces the fibrous web or the felts, is achieved either by reversing the press band after removal from the casting mould so that the structured surface becomes the outer surface of the band while the smooth surface forms the inside thereof, or by grinding drainage ducts into the outer surface of the press band. But especially in the case of small band diameters, reversing of such cast press bands causes serious problems and entails considerable expenditure, wherein the risk of damage to the band cannot be excluded and grinding of the drainage ducts is just as expensive.

Abstract: The invention concerns a thread separator for seaming machines, especially the seaming of dewatering webs, drying webs, felts and so on.The object underlying the invention consists therein to optimize the reliablility of the function of the thread separator by configuring their gripper needles such that the singling out of each foremost thread of a row of warp threads of the web is ensured and each piercing and taking with of the following thread is avoided.It is proposed to construct the gripper needles as separator needles, providing them with special hooks, of which at least two are located with respect to the upper side and the lower side of the web strip related to the row of threads in the same or parallel level opposite to one another, the tips thereof being directed to the opposing thread surface, respectively. The separator needles are provided with concave apertures adapted to the diameter of the thread which is to be separated on grasping it.

Abstract: The production of tension-proof, liquid impermeable, flexible bands which are preferably utilized for presses to dewater fiber material webs and are subjected therein to substantial tensile stresses between a press-shoe and a press-roll as the same glide across the press-shoe which is effected by means of penetration of a flowable mixture of a prepolymer with a cross linking agent onto the reinforcing band, preferably formed of fabric and receiving the tension forces in a direction longitudinally of the press band. Penetration most effectively occurs through covering the fabric band by pouring thereover of the flowable mixture as the band is in stretched condition and is moved.