Abstract: A process for manufacturing wet-felted and thermally bonded porous structures is provided to produce formed porous media for use in filters with improved filtration performance. The process includes the steps of forming a slurry with a primary media consisting of natural or synthetic fibers, a wet strength agent consisting of fibrillated fibers, and a binding agent; vacuum forming the slurry to produce a formed media; drying the formed media using a gas at a temperature below the melting temperature of the binding agent; bonding the formed media using a gas at a temperature above the melting temperature of the binding agent; and cooling the formed media using a gas at ambient temperature. The process produces a formed porous media with improved bonding which results in improved filtration performance.

Abstract: A forming board for a papermaking machine includes: a support; a transversely-extending lead blade attached to the support, the lead blade; a plurality of transversely-extending trailing blades; a mounting unit for each of the plurality of trailing blades, the mounting unit being attached to a respective trailing blade and to the support such that the upper surfaces of the lead blade and the trailing blades are substantially coplanar and such that gaps are defined between the trailing edges and leading edges of adjacent blades, the gaps being of substantially uniform width; and a drive unit attached to the mounting unit and to the support, the drive unit being configured to drive the trailing blades simultaneously to different longitudinal positions relative to the support, wherein the gap widths vary but remain substantially uniform.

Abstract: An asymmetrical trimmer disk/paddle wheel apparatus for trimming tobacco from a stream or braid of cut tobacco in a cigarette maker comprises a pair of counter rotating disks with a plurality of pockets arranged to coact with one another to trim off excess tobacco and create densified regions at the filter and lit ends of a cigarette rod product made in the maker. The pockets are constructed with different widths and depths to provide densified regions of different densities and lengths at the filter and lit ends of the cigarette rod product. The cigarette rod product formed by the asymmetrical trimmer disk/paddle wheel apparatus has an improved density profile that minimizes rejects at maker speeds up to about 8000 rods/minute.

Abstract: The invention relates to a roll for a paper or board machine comprising axle journals on whose support the roll is arranged to revolve, end flanges with which the axle journals are connected, and a mantle which is connected with the end flanges. The mantle is provided with a number of openings extending through the mantle and/or recesses formed into the outer surface of the mantle, which openings and/or recesses form a regular pattern. Solid connecting portions in the outer surface of the mantle around said openings and/or recesses are opened so that, from each opening and/or recess, there is a connection, provided in the form of a groove or an additional recess extending into the outer surface of the roll mantle, with at least each of the openings and/or recesses adjacent to it.

Abstract: Highly textured tissue sheets, particularly suitable for use as bath tissue, are produced by throughdrying and have a low number and/or low amount of pinholes. The low number or amount of pinholes is provided by using a throughdrying fabric having parallel wide ridges with a height suited to the particular tissue sheet being produced.

Abstract: A device for continuous reeling of a pulp sheet, particularly a paper sheet, where the sheet runs over a reel drum and is later wound on a horizontal reel with a horizontally adjustable holding device. The horizontally adjustable holding device having support rollers that run in guide units, where the guide units are sealed off by a vertically arranged moving belt.

Abstract: The invention relates to a process for digesting woodchips used in papermaking. The process employs a digester additive, which is a mixture of (a) a polyglycoside, and (b) a polyoxyalkylene glycol. The digester additives are compatible and stable at elevated temperatures in the highly alkaline white liquor used in the digestion of wood chips into pulp. The invention also relates to the digester additive compositions.

Abstract: A laminate wiping product is disclosed. The wiping product includes a first outer ply that has a textured surface. For example, the first outer ply can be an uncreped throughdried paper web having a three-dimensional conformation. The second outer ply, on the other hand, can be a smoother and softer web. The plies are laminated together by any suitable process. In one embodiment, the plies are embossed and nested together to form the final product.

Abstract: The present invention relates to a method of manufacturing a coated paper having at least one mark resembling a watermark, the method being characterized in that said mark is made after the drying step which follows the last coating operation, by performing steps in which: a) a re-wetting solution is applied to at least one face of the coated paper, in one or more determined zones; and b) pressure and heat are applied in said re-wetted zone(s) of the coated paper so as to evaporate said solution and densify the coated paper in said zone(s) relative to the remainder of the paper. The present invention also provides a coated paper including at least one mark resembling a watermark, characterized in that one or more determined zones of the coated paper present a reduction in thickness relative to the remainder of the coated paper, the density per unit area in said zone(s) of the coated paper being identical to that in the remainder of the paper.

Abstract: A recording medium particularly suitable for electrophotographic copying is characterized by coated paper that for a given basis weight has proportionally less coating and proportionally more fiber than conventional coated paper made for electrophotographic processes. The base sheet of the coated paper is preferably formed square on a paper machine wet end and has on the order of 40-50% less filler than conventional sheet paper made for electrophotographic processes. After being formed and dried, the base sheet is provided with a top coat weight that is approximately 60% less than the typical coat weight used for conventional paper. The coating is formulated to have sufficient viscosity to stay more on the surface of the base sheet. The coated sheet is calendered to a medium gloss on the order of a 75° TAPPI gloss of about 45, both to preserve a degree of surface roughness to enhance runnability of the paper through an electrophotographic copier and to provide a pleasant and easily readable surface.

Abstract: The invention concerns a guide (10) for the web, such as the wire or felt, in a paper machine/board machine. The guide is formed by a bearing housing (12) at one end of a guiding roller (11) in such a way that the bearing housing (12) includes a curved surface as the rolling surface (13). An actuator (14) is adapted to roll the bearing housing along a stop face (T1), whereby by using the actuator (14) an essentially linear transfer is given to a shaft stub (11a1) pivoted by a bearing (15a1) in the bearing housing (12).

Abstract: Stable formulations of fluorescent whitening agents are described. These contain a) 2 to 20% by weight of a fluorescent whitening agent of formula (1) in which R1 is hydrogen, C1-C5-alkyl, C1-C5-alkoxy or halogen and M is hydrogen, an alkali metal, ammonium or magnesium, b) 4 to 30% by weight of an unmodified or modified polyvinyl alcohol, c) 55 to 94% by weight of water and d) 0 to 20% weight of further additives, polyethylene glycol being excluded. A process for the preparation of the formulations and their use for whitening paper materials is also described.

Abstract: A surface-treating agent mainly includes three constituents: a water-soluble polymer; a surface sizing agent which is a copolymer of a styrene type monomer and an anionic monomer and which mainly includes a water-soluble copolymer containing 20 to 80 weight % of the styrene type monomer; and a surface sizing agent which is a copolymer of an olefin type monomer and an anionic monomer and which mainly includes a water-soluble copolymer containing 20 to 80 weight % of the olefin type monomer. The surface-treating agent is coated and dried on a base paper for offset printing.

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: A web of tissue is formed in a twin wire former, followed by an air press for water removal in the pressing section, passing onto a Yankee dryer. A headbox injects stock between upper and lower dryer fabrics brought together on a breast roll. The fabrics move over vacuum boxes, and the web is heated with steam and passed between an upper pressure box and a lower vacuum box forming an air press which dewaters the web. A sheet transfer pickup vacuum box holds the sheet to the upper fabric as the lower fabric diverges from the upper fabric. A pressure roller transfers the web onto a Yankee dryer. The fabrics are cleaned on vertical runs before returning to the breast roll.

Abstract: Process of forming a headbox for a machine, which includes arranging a plurality of headbox channels into rows and columns, positioning a lamella between adjacent rows, fixing an end of the lamella at a fixing point, and arranging lamellar supports downstream of, relative to a headbox flow direction, the fixing point.

Abstract: The present invention relates to a paper tissue, and in particular to facial tissue, and disposable handkerchiefs. Claimed and described is a paper tissue comprising at least two plies, characterized in that the paper tissue has a physiological surface smoothness parameter of less than 700 microns, preferably from 650 microns to 50 microns, more preferably from 650 microns to 300 microns and in combination has a caliper per ply of more than 0.09 mm, preferably from 0.09 mm to 0.5 mm, more preferably from 0.1 mm to 0.2 mm. In one preferred embodiment a three-ply tissue with embossed middle ply is provided. Further is a related process claimed and described.

Abstract: A method and an apparatus are provided for measuring the amount of entrained gases in a liquid sample. A conduit defining a volume is provided. The conduit has an inlet at a lower end thereof and an outlet at an upper end thereof. Liquid sample is made to flow into the inlet, through the conduit, and out of the outlet. The weight of the liquid sample in the conduit is determined during a flow of liquid sample through the conduit to obtain a first measurement. Thereafter, a difference between the first measurement and a predetermined weight value representing a weight of the same liquid sample flowing through the conduit but containing no entrained gases is determined to obtain a calculated weight of entrained gases in the liquid sample flowing through the conduit.

Abstract: A method and apparatus of manufacturing a web which is striped with add-on material, comprising: a first slurry supply which forms a sheet of base web and moves the sheet along a first path; a second slurry supply; and a moving orifice applicator operative so as to repetitively discharge the second slurry upon the moving sheet of base web. The moving orifice applicator includes a chamber box arranged to establish a reservoir of the second slurry across the first path, an endless belt having slotted orifices, the endless belt received through the chamber box, and a drive arrangement operative upon the endless belt to continuously move the orifices along an endless-path and repetitively through the chamber box. The orifices communicate with the reservoir to discharge the second slurry as bands of add-on material to the base web. The slotted orifices can be spaced apart along the belt and oriented so as to be angled with respect to the travel direction of the belt and parallel to each other.

Abstract: A method of increasing retention and drainage in a papermaking furnish comprising adding to the furnish an effective amount of a diallyl-N,N-disubstituted ammonium halide/acrylamide copolymer and an effective amount of a cationic structurally-modified water-soluble polymer, the cationic structurally-modified water-soluble polymer prepared by initiating polymerization of an aqueous solution of from about 95 to about 5 mole percent of an acrylamide monomer and from about 5 to about 95 mole percent of a cationic monomer under free radical polymerization conditions to form a polymer solution and adding at least one structural modifier to the polymer solution after at least 30% polymerization of the monomers has occurred.