Abstract: A flame retardant thermoplastic molding composition containing a thermoplastic copolymer A, a graft copolymer B, and a flame retardant component C, wherein the molding composition contains: A: from 40 to 80% by weight of a thermoplastic copolymer A, obtainable e.g. from acrylonitrile and styrene; B: from 15 to 50% by weight of a graft ABS copolymer B, and C: from 15 to 30% by weight of the flame retardant component C, comprising at least an expandable graphite component (C1) and a phosphorous flame retardant component (C2) and a perfluorinated polymer (C3); has a high fire protection and improved mechanical properties.

Abstract: A flame retardant thermoplastic molding composition containing a thermoplastic copolymer A, a graft copolymer B, and a flame retardant component C, wherein the molding composition contains: A: from 40 to 80% by weight of a thermoplastic copolymer A, obtainable e.g. from acrylonitrile and styrene; B: from 15 to 50% by weight of a graft ABS copolymer B, and C: from 15 to 30% by weight of the flame retardant component C, comprising at least an expandable graphite component (C1) and a phosphorous flame retardant component (C2) and a perfluorinated polymer (C3); has a high fire protection and improved mechanical properties.

Abstract: The invention relates to a bearing element (1, 1.1, 1.2) having at least one primary sliding surface (4) for supporting at least one secondary sliding surface (5) of an element (2) and having at least one primary bearing surface (6) for its own mounting on a secondary bearing surface (7) of a bearing (8), at least two lubrication pockets (9.1, 9.2) being arranged in the region of the sliding surfaces (4, 5) and at least two bearing pockets (10.1, 10.2) being arranged in the region of the bearing surfaces (6, 7), to which at least one fluid (11) can be applied via channels (K9.1, K9.2, K10.1, K10.2) during operation, in such a way that in each case a hydrostatic gap (12.1, 12.2) can be formed between the sliding surfaces (4, 5) and between the bearing surfaces (6, 7). The invention is defined in that the respective lubrication pocket (9.1, 9.2) of the preferably primary sliding surface (4) is connected by means of at least one respective fluid connecting line (K10.1, K10.2) to the bearing pocket (10.1, 10.

Abstract: Headbox for a paper-making machine including a nozzle extending transversely to the machine running direction across the machine width. The nozzle has a lower and an upper continuous wall each extending across the machine width. The lower nozzle wall is supported by several separate supporting elements distributed across the machine width on a foundation. The supporting elements are non-rigid or flexible plates to permit bending in a direction transversely to the machine running direction. Alternatively or additionally, a swivelable or pivotable upper nozzle wall is connected by several separate supporting members distributed across the machine width to a transverse bar attached above a swivel axis. The supporting members are non-rigid or flexible plates to permit bending transversely to the machine running direction.

Abstract: Headbox for a paper machine having a feed part, a central part extending across the machine width, and a nozzle. The nozzle extends across the machine width and has at least one continuous wall that runs across the machine width transverse to the lengthwise flow. For absorbing and discharging nozzle expansion forces in a sectional manner, several separate individual support devices distributed across the machine width for influencing the nozzle aperture are attached to the at least one, preferably continuous wall. The resulting lines of force of each support device remain at least substantially in a plane lying perpendicular to the direction of the machine width and in the flow direction, and the corresponding supporting forces individually, at least substantially, are directed to and absorbed in the central part in the plane of the flow direction.

Abstract: A support beam for at least one long working unit, notably of a paper machine or coater, includes several bundled, long profile elements forming in their entirety the support beam.

Abstract: A roll includes a stationary carrier, a roll jacket, in particular a resilient roll jacket, on the carrier and at least one support element with an associated contact pressure piston, which is supported on the carrier in the region of a pressing zone defined between the roll jacket and a counter surface, while forming a fluid cushion between the support element and the roll jacket. In this arrangement the support element is provided with a pressing section facing the roll jacket, which is bounded in the circumferential direction of the roll by outer edges which are substantially straight and extend parallel to the roll axis, with the width of the pressing section measured between the outer edges being smaller than the maximum outer diameter of the contact pressure piston.

Abstract: Deflection controlled roll. A deflection controlled roll is comprised of a fixed carrier and a roll jacket rotatable about the carrier, with the roll jacket being supported on the carrier via several support elements, wherein each of the support elements has at least one cylinder-piston device, for the formation of a contact force, and a bearing shoe with a separate lubricating fluid supply and wherein the fluid supply of pressure chambers of the cylinder-piston devices is accomplished at least in separate groups, via pressure conduits, with the deflection controlled roll, even though being supported via large number of support elements, being produced in a vibration damping-manner in a simple construction, wherein the pressure conduits have substantially the same length and/or the same volume capacity for the pressure fluid.

Abstract: A roll includes a roll jacket (1) which is rotatably journalled on a stationary carrier (2), with an at least approximately stationary active element (3) being arranged between the roll jacket (1) and the carrier (2), and with the space (4) between the carrier (2) and the roll jacket (1) being at least partially filled with a liquid. Such rolls are in particular used in the manufacture or treatment of material webs. In order to reduce the undesired turbulence losses passages are provided which extend through the active elements (3) approximately in the circumferential direction of the roll.

Abstract: The press guide roll (15) or web guide roll (4) comprises a fiber-reinforced plastic roll tube (20; 6) and a wire layer (7) wound on the surface of the roll tube (20; 6) in order to form substantially peripherally directed grooves (17). On either side of the roll middle (M), complementary sections (7b, 7c) of the windings (7) are inclined slightly relative to the peripheral direction and thus form a wire layer which is mirror symmetrically disposed about the roll's middle plane (M). The web guide roll (4) therefore laterally guides and automatically centers the material web.

Abstract: Apparatus and process are provided wherein pressure is exerted on a web by at least two rollers. One roller includes a roll shell which is rotatable around a stationary beam, wherein the roll shell is supported against the beam by hydraulic operational support elements on the side of the press, as well as by counterpressure elements exerting pressure in the opposite direction. A particularly rapid and safe opening of the roller device, without damaging the supporting elements or the roll shell because of detached supporting elements, is achieved because the hydraulic pressure medium from the pressure areas of at least part of the operational support elements is routed as directly as possible without detours to the pressure areas of counterpressure elements, such as by a multiple sliding valve located at the beam end.

Abstract: The present invention is directed to a heated sag-compensation roller, with short heat-up and cool-down times and a more even temperature distribution, which reduces the risk of damage to the roller shell. These improvement are achieved by the roller shell being heated or cooled from the inside and the outside simultaneously. The heating devices can be controlled so that the temperature difference between the inside and outside does not exceed a particular value.

Abstract: In a roll with a roll shell or jacket which is rotatable about a support or beam, the inner side of the rotatable roll shell or jacket is heated by means of an induction coil which is operated at high frequency and provided, for example, at a support element. The heating is effected directly at the press or work nip or in the proximity thereof without substantial loss of energy and without the use of a thermo-sensitive hydraulic medium.

Abstract: A heatable controlled deflection roll contains hydrostatic support elements, each of which is supported in a pressure chamber and displaceable in a predetermined support or pressing direction. Heating of the rotatable roll shell or jacket of the controlled deflection roll is accomplished by infeeding a heated hydraulic heat carrier medium to bearing pockets of the hydrostatic support elements. This infeed of the heated hydraulic heat carrier medium is effected operationally separate from the provision of the pressure chamber with hydraulic pressurized fluid medium colder than the heated hydraulic heat carrier medium. The infeed of the hydraulic heat carrier medium and the infeed of the hydraulic pressurized fluid medium are thus accomplished via separate lines without thermal stressing of associated regulating valves and pumps and without a viscosity reduction of the hydraulic pressurized fluid medium, such viscosity reduction resulting in a loss of hydraulic pressurized fluid medium.

Abstract: The roll arrangement comprises a controlled deflection roll provided with a roll shell which is rotatable about a stationary carrier and is supported at the latter by support or pressure elements. An additional load bears upon one end of the roll shell. The inherent weight and/or the bending moments caused by the additional load and transmitted to the roll shell are compensated by a supporting structure. As such supporting structure there may be provided a counterweight which acts essentially at the region of the center of gravity of the additional load.

Abstract: The rolling apparatus contains a controlled deflection roll and, in order to improve uniformity of the roll nip or gap or to more precisely maintain a desired rolling profile, a counter roll contains a journal-less tubular roll or shell which is articulatedly supported at a support beam or at supports of a roll stand. The support distance of the counter roll at the most is equal to the effective support distance in the controlled deflection roll. The bending lines of the controlled deflection roll and of the counter roll thus can be matched in an improved manner.

Abstract: An arrangement containing a controlled deflection roll which is supported by means of support or pressure elements against a roll support or beam. There is also provided a regulation arrangement for regulating the position of the roll shell, wherein the position of the roll shell at least at both of its opposed ends is detected by position sensors or feelers and deviations from a set or reference value are processed into two adjustment or positioning magnitudes which act upon the support or pressure elements. Both of the adjustment magnitudes are formed while taking into account a possible difference between both of the reference value-actual value differences and thereafter weighted and grouped together with further adjustment magnitudes and inputted to the support or pressure elements.

Abstract: A controlled deflection roll possesses a roll shell which is radially movable in at least one plane in relation to a roll support. Position feelers or sensors are arranged at the ends of the roll shell. These position feelers control regulators operatively associated with pressure or support elements located between the roll support and the roll shell, as a function of deviations from a predetermined reference or set position, in a manner such that the roll shell is maintained in the reference or set position. It is possible to influence the pressure or support elements by the position feelers either equally or unequally, and specifically, with decreasing intensity in the presence of increasing distance from the related position feeler.

Abstract: The head box has a plurality of distribution pipes for delivering pulp with each distribution pipe communicating via a plurality of feed pipes with a row of flow ducts in a block having a plurality of rows of flow ducts. The feed pipes have equal flow resistance and each has a pin-shaped part at the inlet end which acts to anchor the feed pipe in place. Each pin-shaped part also carries a cam which projects into a distribution pipe to keep the inlet to the respective feed pipe free of fibers.

Abstract: The distribution pipe and pulp guide of the head box are mounted in a box-shaped support which is rotatable within two annular bearings. The support may be rotated so as to move the pulp guide from a horizontal plane into a vertical plane, for example for cleaning purposes. In addition, the distribution pipe is removably secured to the frame so as to be moved out of the support for cleaning purposes.