Abstract: A resin-impregnated endless belt for a long nip press or calender of the shoe type, or for other papermaking and paper-processing applications, has a base support structure which includes coated elements, such as yarns, having a coating of a first polymeric resin material. The base support structure is in the form of an endless loop, at least one of the inner and outer surfaces of which is coated with a second polymeric resin material. The second polymeric resin material impregnates the structure of the base support structure, rendering it impermeable to oil and water. The first and second polymeric resin materials have an affinity for one another, so that the coating of second polymeric resin material on the base support structure as a whole establishes a chemical, as well as a mechanical, interlock with the coated yarns having the coating of first polymeric resin material.

Abstract: A Conventional blanket material, preferably a woven fabric or scrim, is formed into a loop of the desired dimensions and impregnated and coated with a two-component urethane resin. As the urethane is applied to the woven substrate, short fibers are introduced into the urethane through a nozzle which aligns the fibers to run in the cross-machine direction. The fibers are introduced in sufficient quantities to provide significant structural reinforcement of the urethane in the cross-machine direction. The coated blanket is then ground to a desired constant thickness and an array of parallel grooves running in the machine direction are milled into the urethane coating. The anisotropic fiber reinforcement provides sufficient modulus to the urethane system to prevent the grooves from collapsing under the applied loads of the extended nip press. The reinforcing fibers may be glass, carbon fiber, synthetic polymer or other structural fiber material.

Abstract: An easily manufactured shoe press belt for a papermaking machine comprises a high molecular weight cylindrical elastic member having embedded within it, between its inner and outer walls, a multiple layer base member formed by winding a belt-like woven fabric. The layers of the base member are substantially axially coextensive, reinforce the belt against sideward elongation, and achieve uniform hardness and improved durability.

Abstract: A resin-impregnated endless belt for a long nip press of the shoe type has a base structure impregnated by a polymeric resin material which renders the belt impermeable to fluids, such as oil, water and air. The polymeric resin material forms layers on the inner and outer sides of the base structure. The inner layer is smooth, but the outer layer has primary grooves for the temporary storage of water pressed from a paper web. The primary grooves are separated by land areas which have secondary grooves extending thereacross to relieve stresses which give rise to flex fatigue and stress cracking.

Abstract: A wet paper web or other wet porous web exiting a web former is supported on a vented press roll and sequentially subjected to a relatively high pressure mechanical nip pressing force and a relatively low pressure water displacement-pressing force. The combination of the two diverse pressing forces applied in sequence to the web is very effective in efficient and economical de-watering of the web and at the same time provides a de-watered web having high bulk, high solids content and high mechanical strength. The low pressure fluid displacement pressing force is applied immediately contiguous to the high pressure mechanical nip pressing force and may be applied upstream or downstream or both upstream and downstream of the mechanical nip pressing force.

Abstract: To improve the water squeezing function of a shoe press belt for papermaking, the wet web side layer of a main body of the belt is composed of a high molecular weight elastic material, and the wet web facing surface of the wet web side layer is made hydrophobic. Water, squeezed from the wet web under compression in a shoe press, and transferred to the surface of the wet web side layer of the belt through a felt, may be shaken off reliably before the belt is again subjected to compression.

Abstract: A method for manufacturing a resin-impregnated endless belt structure having a texturized outer surface requires the use of a support structure, either a cylindrical mandrel or a pair of carrying rolls, having a texturized surface. An endless, permeable base structure is placed about the support structure, which is adapted to place the base structure under tension in a longitudinal direction. A polymeric resin material is dispensed onto the outside of the base structure on the support structure. The polymeric resin material totally impregnates the base structure and passes therethrough to coat the texturized surface of the support structure. A layer of polymeric resin material is also built up on the outside of the base structure. The polymeric resin material is then cured, and may be ground to provide the layer of polymeric resin material with a smooth, uniform surface, and the belt structure thus obtained is removed from the support structure.

Abstract: The present invention provides a press jacket of a press device and a method for treating a material web, in particular a paper or cardboard web, in a nip, where the press jacket has an outer circumferential surface that is provided with grooves and/or blind bores. The grooves and/or bores include a side wall having an the opening region with a bevel and/or a rounded section that extends along a curved line, in order to counteract a volume reduction that occurs when the press device is loaded.

Abstract: A paper machine for manufacturing soft paper comprises a press section with a shoe press nip, through which a substantially impermeable belt and a felt run with the fibrous web enclosed between them, a drying cylinder and a transfer roll forming a nip for transfer of the web to the drying cylinder. According to the invention the belt comprises a carrier with a compressible polymer coating having a hardness of 50 to 97 Shore A, which polymer coating has a web-contacting surface with a degree of roughness in unloaded state of Rz=2-80 microns, measured in accordance with ISO 4287, and a lower degree of roughness of Rz=0-20 microns when the polymer coating is compressed by linear load of 20-220 kN/m on the belt as measured in a non-extended press nip, the belt and the web-carrying felt being arranged to run together not until they enter the press section, the belt running directly to the press section.

Abstract: A shoe press unit comprises a support beam, a shoe element movably supported on the beam, a pressing unit arranged between the beam and the shoe element for urging the shoe element away from the beam and toward a counter element, and a flexible belt that is arranged to slide over the pressing surface of the shoe element. An oil evacuation arrangement is affixed to the shoe element proximate an upstream edge region thereof. The oil evacuation arrangement has an inlet opening located such that excess oil expelled from between the belt and the shoe element passes through the inlet opening. An evacuation duct is connected with the container for evacuating oil therefrom, and the duct is movably connected to an outlet pipe within the shoe press unit. In one embodiment, the duct is connected via a flexible bellows to a pipe fixed to the outlet pipe.

Abstract: The invention refers to a shoe press belt (1) for use in shoe presses of a paper machine, having a support (2) and a liquid-impermeable belt layer (3, 5) which has an inner layer (3) and an outer layer (5), the outer layer (5) having a porous structure and the porous structure being formed exclusively from cavities (8, 12, 14) open toward the outer side; and is characterized in that the outer layer (5) is made of an unfoamed material.

Abstract: The invention relates to a press in a machine for the production or treatment of a continuously running web of cellulosic fibrous material, for instance a paper, tissue or board machine, which press comprises a press device and a counter element arranged opposite the press device, which is arranged to form a press zone in the form of an extended press nip in cooperation with the press device having a certain width in the machine direction for pressing the fibrous web as it runs through the press nip, which press device comprises a press shoe, a support element for supporting and pressing the press shoe in a direction towards the counter element via at least one power device arranged between the press shoe and the support element for application of a certain pressure onto the fibrous web during the pressing operation, a flexible and preferably impermeable belt that is arranged to run in a continuous loop around the support element and through the press nip, having a sliding contact with the press shoe and a fi

Abstract: Machine and process for producing a fibrous material web. The machine includes at least one shoe press having at least one drying cylinder and a shoe press unit which are arranged to form a pressing nip elongated in a web travel direction. At least one suctioned apparatus is arranged before the at least one shoe press relative to the web travel direction, and a water-permeable continuous carrying belt is arranged to guide the fibrous material web over the at least one suctioned apparatus and through the elongated pressing nip. A hood subjected to an overpressure is assigned to the suctioned apparatus and is arranged to support an underpressure effect of the at least one suctioned apparatus. The process includes guiding the fibrous material web and the carrying belt through the elongated pressing nip, and supporting an underpressure effect of the suctioned apparatus by creating an overpressure in the hood.

Abstract: The invention relates to a method of and a device for the manufacture of dimensionally stable, liquid-impermeable, flexible, elastic pressbands, particularly for use with broad-nip shoepresses of paper making machines. The method comprising pouring a flowable mixture of a prepolymer onto a substrate moved by a distance maintaining device over a cylindrical mandrel and maintained during this movement in an adjustable distance from the surface of said mandrel, and being coated during this movement by a coating device with a flowable prepolymer, wherein during this coating of the substrate threads or wires are laid down onto the substrate in the direction of rotation of the mandrel and are coated with the polymer substance.

Abstract: A transfer belt of a web press with an extended press gap for drying a paper web includes a support belt, in particular a woven or machined belt, a water-resistant polymer layer needled onto the support belt, and a fibrous surface layer arranged on the polymer layer.

Abstract: A papermaking belt comprises a reinforcing element and a resinous framework joined together. The resinous framework is formed by a plurality of resinous beads which mutually contact or cross-over. Super-knuckles extending outwardly from the reinforcing element are formed at points of contact. A preferred continuous process for making the belt comprises extruding, in a pre-selected pattern, a plurality of beads of a resinous material onto the forming surface thereby forming the resinous framework thereon, joining the resinous framework and the reinforcing element together, and then solidifying the resinous framework. The resinous material may comprise at least two chemically-active materials capable of cross-linking upon contact.

Abstract: An endless belt in which a fibrous material is dispersed in a substantially uniform manner all over an endless elastic body layer is provided. A non-woven tape is impregnated with a polyurethane elastomer material liquid and wound and layered on a supporting belt, and then, after curing the polyurethane elastomer material liquid to form an elastic body, it is removed from supporting belt.

Abstract: The invention provides a web transfer belt, having good paper releasability, that can be produced with ease and at a low cost without increasing either its hardness or its weight, and a production process therefor. In one embodiment, the web transfer belt includes a high-molecular weight elastic member formed using a resin material mixed with microcapsules (alternatively, closed bubbles or closed bubbles created by a foaming agent), and having a web-receiving face for receiving a web P thereon to transfer, at whose web-receiving face there are provided a multitude of recesses having cut-openings of the microcapsules, such that a water film W easy to be formed between the web-receiving face and the web P can be broken by a large number of recesses.

Abstract: The problem of this invention is to inhibit the infiltration of a lubricating oil supplied to the contact area of the shoe with the belt into the high molecular weight elastic member, and to offer a shoe press belt which has an excellent performance improving durability of the friction surface, preventing flaking off phenomena, cracks, and breakage; and its manufacturing method. An endless shoe press belt the inner portion 1a of which is adapted to contact a shoe S of a papermaking machine, said inner portion 1a being composed of a high molecular weight elastic material, characterized in that the surface of said inner portion is provided with a protective oil 3 comprising an oil the viscosity of which is higher than that of a lubricating oil J supplied to the contact area of said inner portion with said shoe, or a paste-like oil having a certain consistency. It effectively prevents infiltration of the lubricating oil into the surface of the inner portion of the belt.

Abstract: A web transfer belt is provided having a good paper releasability with good paper releasability and having stable surface features. The web transfer belt includes a high-molecular weight elastic member 2 having a web-receiving face 2b for receiving a web P to transfer, and a surface layer forming member 3 disposed on the high-molecular weight elastic weight member 2. A portion of high-molecular weight elastic weight member 2 is exposed on web-receiving face 2b, with one of the web-receiving face 2b and surface layer forming member 3 being made of a hydrophobic material. In this way, water-repellent portions and water-condensing portions are dispersed on the web-receiving face, with recesses and protrusions at fine scales, which can break a water film formed between web-receiving face 2b and web P, and can be easily formed on the web-receiving face 2b.

Abstract: A wet web transfer belt for a closed draw papermaking machine is provided with a rough surface to allow easy release of a wet web. The rough surface is obtained easily, and with reliable quality, by forming the web-contacting side of a batt layer from a welded layer of meltable fiber.

Abstract: A shoe press belt for use between a press roll and a shoe for pressing water from a wet sheet, formed with one or more grooves on the surface thereof for draining water, wherein the groove defines a plurality of laterally spaced channels, the channels having outwardly curved side walls and may include a rounded bottom. The shoe press belt has an improved groove configuration which retains water drainage capacity under nip pressure, while at the same time being resistant to crack formation, thereby enabling a satisfactory service life and avoiding the formation of ‘groove-marks’ on the pressed sheet. The press belt is simple in design and thus inexpensive to manufacture.

Abstract: A resin-coated endless belt for a long nip press has a base which is a polymeric film structure in the form of an endless loop with an inner surface, an outer surface, a transverse direction and a longitudinal direction. The polymeric film structure has a plurality of perforations which may be aligned in one or both of these directions. The polymeric film structure is stretched in the presence of heat to orient the molecular chains in the unperforated intervals between the perforations to provide the structure with tenacity and resistance to further stretching. At least the inner surface of the base (polymeric film structure) is coated with a polymeric resin material, such as polyurethane. The polymeric resin material coats the base and upon curing, forms a mechanical interlock therewith by virtue of the perforations, and renders it impermeable to oil and water.

Abstract: A shoe press belt capable of improving flexibility in bending in the axial direction of and of inhibiting cracks in the belt where it contacts the ends of a shoe has first resin layer formed on a mandrel, a base material layer formed on the outer periphery of the first resin layer, and a second resin layer including the base material layer. The base material layer is a composite layer including an inner layer in which one or more yarn strands are wound spirally on the first resin layer in the circumferential direction, a middle layer in which a yarn strand is arranged on the inner layer generally parallel to the axial direction of the mandrel, and an outer layer in which at least one yarn strand is wound spirally on the middle layer in the circumferential direction in such a way that it does not overlap the yarn of the inner layer and crimps the yarn of the middle layer.

Abstract: Device and method for draining a web in a paper production machine. The device may include a press section having at least one press nip for draining and smoothing the web. The at least one press nip may be arranged to smooth one surface of the web more than its opposite surface and the device may also include a roughening device that roughens the one surface of the web. The method may include guiding the web through a press section of the paper production machine to drain and smooth the web in which the press section include at least one nip, smoothing one surface of the web more than its opposite surface in the at least one nip, and roughening the one surface.

Abstract: A resin-impregnated endless belt for a long nip press or calender of the shoe type, or for other papermaking and paper-processing applications, has an open base fabric in the form of an endless loop with an inner surface, an outer surface, a machine direction and a cross-machine direction. A coating of a polymeric resin is on the inner surface of the base fabric. The polymeric resin impregnates and renders the base fabric impermeable to liquids, and forms a layer on the inner surface thereof. The coating is smooth and provides the belt with a uniform thickness. The belt is manufactured by mounting the base fabric about a first roll and a second roll, which are separated to place the base fabric under tension in the machine direction. A conveyor belt is placed within the base fabric at a preselected distance from the inner surface thereof.

Abstract: A shoe press jacket, wherein a base fabric layer consisting of woven cloth having filament yarn of straight or nearly straight arrangement in at least one of warp and weft is coated with resin from one surface thereof, the thickness of said base fabric layer is filled with said resin and a coated layer is formed on the opposite surface.

Abstract: A resin-impregnated endless belt for a long nip press or calender of the shoe type, or for other papermaking and paper-processing applications, has a base fabric in the form of an endless loop with an inner surface, an outer surface, a machine direction and a cross-machine direction. The base fabric has machine-direction (MD) structural elements and cross-machine-direction (CD) structural elements in an open structure wherein at least some of the MD structural elements and CD structural elements are spaced apart from one another. The MD structural elements cross the CD structural elements at a plurality of crossing points, where they are joined to one another by mechanical, chemical or thermobonding means. A coating of a first polymeric resin is on the inner surface of the base fabric. The first polymeric resin impregnates and renders the base fabric impermeable to liquids, and forms a layer on the inner surface thereof. The coating is smooth and provides the belt with a uniform thickness.