Abstract: A press belt in the form of an endless loop includes crosswise and lengthwise reinforcing fibers. The crosswise reinforcing fibers are positioned adjacent to the outside surface of the belt and the lengthwise reinforcing fibers are positioned adjacent to the inside surface of the belt. The fibers are laid inside a casting cylinder and an elastomeric material is cast onto the fibers while the casting cylinder is rotating. The crosswise fibers are laid into the casting cylinder first so that they are adjacent to the outer surface of the belt and then the lengthwise fibers are laid over the crosswise fibers.

Abstract: A backside textured papermaking belt is disclosed which is comprised of a framework and a reinforcing structure. The framework has a first surface which defines the paper-contacting side of the belt, a second surface opposite the first surface, and conduits which extend between first and second surfaces of the belt. The first surface of the framework has a paper side network formed therein which defines the conduits. The second surface of the framework has a backside network with passageways that provide surface texture irregularities in the backside network. The papermaking belt is made by applying a coating of photosensitive resinous material to a reinforcing structure which has opaque portions, and then exposing the photosensitive resinous material to light of an activating wavelength through a mask which has transparent and opaque regions and also through the reinforcing structure.

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: A press jacket is formed of an elastomeric jacket material having two layers of reinforcement threads, namely an inner layer and an outer layer, embedded in it. The inner layer is formed of longitudinal threads which upon operation of the press device extend parallel to the axis of rotation of the press jacket. The outer layer is formed by a fabric layer or by circumferential threads which are wound helically and which, upon operation of the press device, extend approximately in the direction of travel of the press jacket. The reinforcement threads are surrounded by the layer of elastomeric material, which is produced homogeneously. The inner surface of the press jacket has longitudinal grooves which extend parallel to the longitudinal threads and have a depth of 0.1 to 0.2 mm. Various techniques of forming those grooves are described, including enlarging the longitudinal threads, pressing on the jacket which thereby deforms around the threads, forming voids or channels (i.e.

Abstract: The invention relates to a woven machine clothing comprising at least two warp thread systems (3, 5) and one weft thread system (4). Characteristic of the invention is that the two warp thread systems (3, 5) have been interlaced with each other by thread twisting alternately clockwise (at 4b/6b) and counterclockwise (4f/6f).

Abstract: This invention relates to sleeves or belts which are used in paper machines. Such structures of this type, generally, are reinforced through the use of reinforcing fibers which are oriented at an angle turned 45.degree. from the straight machine direction orientation. This arrangement aligns the individual reinforcing strands in the direction of the principal tensile stresses that exist within the sleeve or belt structure as the sleeve or belt is being rotated in the paper machine.

Abstract: A press is devised for a papermaking machine. The press is of the type having a rotary press roll, a substantially stationary pressure shoe, and a press belt running in an endless path around the pressure shoe between this and the press roll and having a substantially impermeable inner surface facing the pressure shoe. A separate, endless reinforcing belt enclosing the press belt is in frictional engagement over the entire length of the press belt so as to run together in the press belt in the endless path. The reinforcing belt may be prestressed, e.g. by shrinkage, in its running direction and, optionally, also transversally thereof. According to a second aspect, the invention relates to a method of modifying a press of the type indicated above, in which method the press belt is enclosed by a separate, endless reinforcing belt of the above-indicated type.

Abstract: A felt for use in a papermaking machine consists of a textile base fabric and a batt layer for supporting the paper web. A flow control layer is interposed between the base layer and the batt layer, to prevent rewetting of the paper web upon the paper web exiting the press nip of the paper making machine. The flow control layer is formed of a porous hydrophobic material. Pressure exerted by the press nip forces water from the paper through the upper batt layer and the flow control layer into the base layer. When such pressure is relieved, the hydrophobicity of the flow control layer prevents backflow of water to the upper batt layer and the paper web, to prevent rewetting of the web. The flow control layer is preferably formed of a spunbonded filamentary nylon material treated with a hydrophobic chemical composition, which maintains its integrity during the needling process in which the batt layer and the base layer are secured together.

Abstract: A backside textured papermaking belt is disclosed which is comprised of a framework and a reinforcing structure. The framework has a first surface which defines the paper-contacting side of the belt, a second surface opposite the first surface, and conduits which extend between first and second surfaces of the belt. The first surface of the framework has a paper side network formed therein which defines the conduits. The second surface of the framework has a backside network with passageways that provide surface texture irregularities in the backside network. The papermaking belt is made by applying a coating of photosensitive resinous material to a reinforcing structure which has opaque portions, and then exposing the photosensitive resinous material to light of an activating wavelength through a mask which has transparent and opaque regions and also through the reinforcing structure.

Abstract: An extendable and heat shrinkable polyamide monofilament which has an extension of 6% or more to a loading variation in the range of 1.25 g/d-1.75 g/d and a heat shrinkage factor of 7% or more on immersing said monofilament into boiling water. The recited polyamide monofilament is woven into a wear-resistant fabric such as a papermaking fabric.

Abstract: A press jacket is formed of an elastomeric jacket material having two layers of reinforcement threads, namely an inner layer and an outer layer, embedded in it. The inner layer is formed of longitudinal threads which upon operation of the press device extend parallel to the axis of rotation of the press jacket. The outer layer is formed by a fabric layer or by circumferential threads which are wound helically and which, upon operation of the press device, extend approximately in the direction of travel of the press jacket. The reinforcement threads are surrounded by the layer of elastomeric material, which is produced homogeneously. The inner surface of the press jacket has longitudinal grooves which extend parallel to the longitudinal threads and have a depth of 0.1 to 0.2 mm.

Abstract: A transfer belt for eliminating an open draw between a press in a papermachine and a transfer point has a supporting base with a particle-filled polymer coating. The coating, which constitutes the paper side of the transfer belt, carries the paper sheet from a press nip in a closed draw to a transfer point without sheet flutter or drop-off. At the transfer point, the paper sheet is readily released to another sheet-conveying papermachine-clothing product. The transfer belt may carry the sheet through more than one press nip. The transfer belt surface has a pressure-responsive recoverable degree of roughness, which is made relatively smooth by compression in the press nip, allowing the thin, almost continuous water film to form between the transfer belt and the paper sheet. When leaving the press nip, the paper sheet is held to the transfer belt by the thin, almost continuous water film.

Abstract: An endless impervious, oil, abrasion, and crush resistant belt for use with papermaking machinery such as presses, especially of the extended nip type for the mechanical removal of water from a web of paper including a urethane coating impregnating woven base providing a structure which is impregnated and impervious to oil, water, and air. The impregnated surface of the belt is made smooth and uniform in thickness through a grinding and polishing operation to act as a hydraulic bearing surface.

Abstract: An endless impervious, oil, abrasion, and crush resistant belt for use with papermaking machinery such as presses, especially of the extended nip type for the mechanical removal of water from a web of paper including a urethane coating impregnating a portion of a woven base providing multiple layers of base void of urethane and the portion impregnated impervious to oil, water, and air. The impregnated surface of the belt is made smooth and uniform in thickness through a grinding and polishing operation to act as a hydraulic bearing surface. The portion of the base void of urethane is capable of receiving and carrying water essential in the papermaking process.

Abstract: A papermaking fabric having permanent resistance to adhesion of contaminants, and a method to make such a fabric by treatment of a papermakers fabric with a solution having as its primary components tetrafluoroethylene, urethane copolymer and polyacrylamide. The treatment, prepared in a solution, is coated on the fabric and cured to impart permanent anti-sticking properties to the fabric.

Abstract: A belt for use on a long nip press for dewatering a fibrous web may be manufactured by winding an elongated strip onto a pair of process rolls to form a closed helix. Adjacent coils of the closed helix are bound to one another with an adhesive. The elongated strip includes a reinforcing web coated on one side with a uniformly smooth coating of a polymeric resin. The other side of the reinforcing web is coated with another polymeric resin of higher hardness value, and is provided with grooves. The elongated strip is wound onto the process rolls to produce a belt with a grooved outer surface. The method facilitates the manufacture of belts of a variety of widths and lengths.

Abstract: A belt for use on a long nip press for dewatering a fibrous web includes a base fabric, woven from machine-direction and cross-machine directions yarns and taking the form of an endless loop. The base fabric many be woven from monofilaments yarns of a synthetic polymeric resin in either a single- or a multi-layer weave. At least one side of the base fabric, namely, that side which will be on the inside of the belt in its endless loop form, and which slides over the arcuate pressure shoe component of the long nip press during its operation, is coated with a polymeric resin, such as polyurethane, to render it impervious to liquids, especially lubricating oil. The coating is reinforced with a flexible layer of reinforcing fiber which may take the form of a woven sheet or may be in single filament form in single or multiple layers thereof. When in single filament form, each layer includes filaments disposed adjacent and substantially parallel to one another.

Abstract: The present invention provides a belt for papermaking machines, said belt comprising a flexible belt layer impermeable to liquids and is smooth on its backside while its front side integrates, but only partly, a support-track having cavities and it contains longitudinal threads extending in the direction of advance and located between the support track and the backside of the belt.

Abstract: An ENP belt for use in the press-section of a papermaking machine is disclosed which comprises a sheet-like body part (11) having integrally formed machine-direction ribs (12) extending outwardly from the surface therefrom, there being reinforcing yarns (16) in register with respective ones of some at least of the said ribs (12) and at least partially located therein. Cross machine direction ribs (15) extending between adjacent machine direction ribs may be provided, if desired.

Abstract: An endless flexible press jacket for a press roll, a process for its fabrication and an apparatus upon which it is fabricated. The press jacket comprises a radially inner layer of elastomeric material which is provided with embedded layers of reinforcing yarns, an inner longitudinal layer of yarns extending under tension between the lateral ends of the endless tubular press jacket and a helical winding of peripheral yarns pretensioned and wrapped around the longitudinal yarns. The longitudinal yarns are held pretensioned radially above a casting mandrel and the casting nozzle moves along the axis of the casting mandrel delivering a helix of castable jacket material around the casting mandrel. At the same time, the later peripheral yarns are applied into the longitudinal yarns in the applied jacket material.