Abstract: A method of operating a papermaking process containing a press section with at least one press nip is disclosed.

Abstract: The present invention is directed towards fabrics formed from yarns of a composite filament structure. The composite filament structure is a high modulus filament material covered with bicomponent filaments and the entire surface area of the high modulus material should be covered. The fabric can be used in clothings for paper making machines and other industrial uses.

Abstract: This invention relates to a composition of matter having a fibre structure incorporating a major proportion of heat shrinkable fibres, the structure includes within it discreet fibre groupings which serve to provide structural elements within the composition. The composition of the invention is capable of being formed to provide shaped products. A particular aspect of the invention relates to compositions comprising flame retardant fibres typically polyimide fibres which enables the production of flame retardent compositions. The density of the structures can be controlled as can the rigidity thereof.

Abstract: A pin-seamable papermaker's fabric, designed for use on the press section of a papermachine, is woven from systems of yarns which align in the machine and cross-machine directions of the papermachine when the fabric is operating thereon. The machine-direction yarns have a composite structure, including braided monofilament strands as the load-bearing components of the fabric. The fabric is produced in open-ended form, and has loops at each end formed by the machine-direction yarns. It is made endless during installation on the papermachine by bringing the two ends together, by interdigitating the loops of the two ends, and by directing a pin, or pintle, through the passage formed by the interdigitated loops. The loops themselves, being formed by the machine-direction yarns, likewise include braided monofilament strands.

Abstract: This disclosure describes a method by which an edge curl that often develops in papermachine forming fabrics can be reduced or eliminated. The method requires the removal of mass from the sheet forming side of the forming fabric. This has the effect of reducing the ratio between the shrink forces acting on the two sides of the forming fabric in the cross-machine direction and, in turn, reduces the tendency for shrinkage to cause the edges of the fabric to curl. Papermachine operational problems associated with edge curl are thereby reduced.

Abstract: A method and apparatus for generating in real time full width formation profiles of a web of material which passes between a light source and a camera which generates signals corresponding to the light intensity across the entire width of the web as compared to single point or sample measurements. These signals are then processed to generate in real time at a full width formation profile of the web.

Abstract: A light assembly for generating a narrow light beam of relatively uniform intensity for use in association with a light sensor for sensing variations in light intensity; the assembly includes a plurality of standard size aperture light bulbs positioned in a staggered arrangement in a housing with light extender members comprising alternating sheets of light transmissive material joined to form a common surface to generate the light beam.

Abstract: A separatory module for use in separation of fluids by various methods i.e. ultra filtration, hyper filtration, reverse osmosis, or dialysis, includes a pressure shell encasing the hollow separatory fibers. The pressure shell contains threaded connections to end plugs at either end. The threaded connections provide sufficient pressure resistance to serve as a pressure container for high pressure separatory techniques. In addition, a seal is provided on the threaded end plugs so that when the end plug is threaded into the cylinder the end plugs act as a pressure stop and a fluid tight seal.

Abstract: A bundle of helical segments of permselective hollow fibers for use in a separatory module, all segments being limited in length to not over 1.1 times a selected value and all helical paths being arranged to avoid the creation of undesirable ridges and method for producing.

Abstract: The present invention envisions a concentric structural combination of elements, consisting of an elongate core component, which is terminated at each end on the internal surface of a chambered coupling, and a elongate sheath component which consists of an interlaced configuration of assemblies of non-metallic filamentary elements embedded in a polymer matrix, the sheath component being bonded at each end to the external surface of the coupling, the load-elongation characteristics of the core and sheath components being chosen so as to ensure that both components share substantially in the load-bearing under the working load conditions, with at least 50% of the load being borne by the aggregate of the non-metallic elements, and the sheath and matrix being disposed so as to substantially cover and protect the core and coupling components.

Abstract: A vacuum control system and method for dewatering felts or fabrics on a papermaking machine including a suction pipe and a centrifugal exhauster connected to the suction pipe to supply a variable vacuum level. The fabric is passed over a slot in the suction pipe so that suction applied therethrough will dewater the fabric. A variable drive device is connected to the centrifugal exhauster for its operation with the variable drive device being responsive to an increase in the vacuum level in the suction pipe as fabric permeability decreases to correspondingly increase the speed of the centrifugal exhauster so as to increase the vacuum level in the suction pipe as a function of the decrease in felt permeability.

Abstract: A sanitary fan spray nozzle is disclosed together with its method of manufacture. The nozzle includes a passage extending from the interior surface of the tube to an exterior surface thereof. The passage has a relatively large diameter for a portion thereof between the interior surface of the tube and a point within the tube walls. The passage then narrows and is intersected by an arcuate groove having a lengthwise dimension which is substantially parallel to the longitudinal axis of the tube. The width of the arcuate groove is smaller than the diameter of the larger portion of the passage. The nozzle is formed by a method which includes drilling a pair of diametrically opposed small pilot holes through the tube, drilling completely through one of the pilot holes and a portion of the opposing hole with the bit having a larger diameter than the pilot holes. An arcuate groove is then cut within the exterior surface of the tube. The opposite hole is later plugged.

Abstract: A method and apparatus for broadcast dispersion of biologically active encapsulated dispensers over preselected areas in a preselected pattern which utilizes a primary rotating applicator. The apparatus includes a hopper for the encapsulated dispensers and means for moving the dispensers onto a surface of the primary applicator from there to be discharged tangentially. A "sticker" substance is mixed with the dispensers. The distribution pattern is modified by one or more secondary directional spreaders located adjacent the primary applicator which serve to deflect and re-direct the dispensers.

Abstract: A constant tension device is provided for use with a filter bag. The device includes a spring and a linkage assembly for applying tension to the filter bag. The linkage assembly is designed such that a substantially constant tension is applied to the bag regardless of the force exerted by the spring. A pair of lever arms is included within the linkage assembly for applying pressure to a bag cap if the device is used within the filter bag.

Abstract: The invention relates to shower fittings especially those used in the paper and board making industries. The shower fitting incorporates at least one jet for directing on to a surface a jet of liquid which is suitable for cleaning and/or reconditioning the surface. The jet or jets are normally mounted in a tube to which the liquid is supplied and which is reciprocated across the surface to ensure that the entire width of the surface is treated and to avoid damage to the surface that might result if a jet of liquid is directed constantly at the same area of the surface. The invention is concerned with the problem of ensuring adequate support and protection for the tube. In one particular embodiment, the tube 1 is mounted for reciprocation inside a support tube 3. Support bushes 2 spaced along the axial length of the tube 1 ensure adequate support while protection is provided by the outer tube 3.

Abstract: A hollow filament separatory module utilizing an annulus of semi-permeable hollow filaments with open ends encased in a potting compound and a collection chamber communicating with said open ends adjacent the potting compound with access surface means formed in the potting compound wherein the open ends appear, said filaments having ends thereof encapsulated by the introduction of potting medium into the interfilament interstices under the urging of vibratory energy and thereafter creating said open ends by cutting of ends and potting medium at a time in the curring cycle of the potting compound prior to its final cure.

Abstract: A sector for a disc-shaped filter. The device includes a substantially sector-shaped element having a pair of opposed sides, a pair of opposing edges converging toward each other and terminating in a neck at one end and diverging toward the other direction to terminate at an arcuate outer edge. An arrangement of flow paths is on each side and positioned to direct fluid filtrate toward the neck. The element is adapted to be interconnected with a plurality of similar sectors to form a disc-shaped filter and is adapted to be interconnected with a source for pressure differential so that when a filter medium is mounted thereon, filtrate collected therethrough will be directed to the neck for removal.

Abstract: A prosthesis for an inadequate or diseased heart valve, the prosthesis being formed of a porous fabric comprising multifilament synthetic yarns supported on a plural-lobed frame. The frame has generally parallel legs each comprising a pair of rod portions. The fabric is inserted between the rod portions of the legs to form flexible leaflets. Each leaflet consists essentially of a textile of filaments having a substantial number of open interstitial spaces in the range of 20 to 40 microns evenly distributed throughout the fabric. The resulting composite structures are free of thrombogenic complications.

Abstract: The disclosure is of a multi-layer, flat woven, composite fabric having a duplex weave base of synthetic, polymeric resin monofilaments and a soft surface of multi-filament or spun yarns. The fabric is useful as a conventional dryer felt and may also be used as a hot air impingement dryer felt. The fabric is especially advantageous for dryer felts employed for the manufacture of fragile papers.