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: The press section of a papermaking machine for dewatering a paper web comprises two separate, successively arranged extended nip press locations. Both of the extended nip press locations contain at least one respective felt which travels together with the paper web through the associated extended nip press location. The paper web is guided from the first extended nip press location to a web removal device contacted by an upper felt of the second extended nip press location, and from that location the paper web can move to the second extended nip press location.

Abstract: The proposed multilayer head box for a paper machine or similar is constructed so that it can produce a wide jet consisting of at least three individual jets (5, 5', 5") The individual jets are fed through separate channels (3, 3", 3") and emitted out of the head box and subsequently combine to form a single wide jet. The individual channels are so constructed that further outer lying jets can be diverted sufficiently after having been emitted out of their respective channel, so that they meet the respective further inner lying partial stream at a very slight angle. The problem of separation when the partial streams are diverted as well as that of undesired lateral mixing when the partial streams are combined are thereby prevented.

Abstract: A method of removing fine contaminants from waste paper fibrous material (S) is described with solution (1) and pre cleaning (2) whereupon the fibrous material is first subjected to a washing treatment (3) and then to a flotation treatment (5). The washing filtrate (12) from the washing treatment (3) is cleaned in a filtrate-flotation treatment (4) so that a cleaned fraction (14) can be returned into the useful material (13) of the washing treatment. The so cleaned waste paper fibrous material can be passed to further treatment steps such as flotation, bleaching and/or dispersion. The reject material from the filtrate-flotation (4) is, in one embodiment, again subjected to a flotation treatment.

Abstract: In a turbo machine, for example, a turbo compressor, the rotor shaft extends through and is sealed relative a housing via dry gas seals in which a seal clearance is achieved between a rotating, sealing body and a non-rotating sliding body in which the inner side of the dry gas seal is charged with a barrier gas, with the leakage of the dry gas seal being dammed via a back-up plate and the dynamic pressure is monitored via a pressure inspection device, wherein due to increasing dynamic pressure an alarm is given off or the turbo machine is automatically shutdown without delay so that the exit of gas, particularly of toxic or explosive gas from the inner area of the housing of the turbo machine is avoided, wherein, via the use of multiple seals the leakage pressure of one of the inner dry gas seals can initiate a warning or alarm signal and via the leakage pressure of the outer dry gas seal, the turbo machine can be shut down.

Abstract: A process is proposed for the dewatering of compressibly dewaterable materials, in particular waste from the processing of paper material, which enables a very high degree of dewatering so that the waste can be readily disposed of, e.g. dumped. For this purpose, the material to be dewatered is initially pre-dewatered by gravity, and usually also by compression, in a transportation section (5). This pre-dewatering can take place in a continually operating feed section (7) through a perforated sieve jacket (10). The material then reaches a press section (6) in which a discontinuously working pressing device is in operation. Further improvements in the dewatering performance are possible by various embodiments of the corresponding pressing elements (13,14). The invention relates to both the process and the device for implemention of the process.

Abstract: A roll assembly comprising a rotatable roll (1 in FIG. 2) and a second roll (2 in FIG. 2) cooperating therewith, in which a pressing element (17) to effect displacement between the rolls along a pressure plane of the roll assembly is located in one of the rolls (1,2) and in which both rolls are supported at either end by respective support members (5,6). Prior to operation of the roll assembly, dumbbell-like shaped connecting parts (7) installed in corresponding cut-outs (9) in the support members (5,6) are tensioned and thereby securely form-locked by actuating the pressing element (17). Locking action is released by subsequent deactivation of the pressing element (17) after which the connecting parts (7) can be withdrawn. Two principal advantages of this arrangement, are the compacter construction, enabled by the fact that the frame no longer bears the pressing forces of the roll assembly, and the ease and speed with which components such as rolls, roll jackets or felt belts can be changed.

Abstract: A roll for the thermal treatment of a web of material (4) in which the web of material (4) is cooled to a defined predetermined temperature in a gap (5) between the roll (1) and a counter-roll (2) is formed as a deflection controlled roll with a rotationally fixed carrier (8) and a rotatable roll jacket (10) which is supported relative to the latter with support elements (11). The roll jacket consists of a plurality of concentric zones, an inner soft zone (16) and a thin outer zone (17) with good thermal conductivity, for example of metal. The roll surface (22) is for example cooled with cooling gas nozzles which are regulated by a temperature sensor (20) so that the roll temperature in the gap (5) adopts a defined temperature value. A roll of this kind is for example suitable for use in a calender for the smoothing of a paper web or also for the processing or manufacture of a plastic foil.

Abstract: A press for the mechanical dewatering of water-containing pulverised solid material is provided with a rotatable feed screw (3) which is so floatably mounted that it can perform a rotary pendular pivoting movement about a swivel point (D) lying in the area of the drive. Thereby, a high dewatering power is achieved with advantagous wear properties of the press. By special formation of the region where the solid material leaves the feed section (3), the effect and operating behavior can be further improved.

Abstract: The invention relates to an apparatus for the generation of smoothness in paper. The paper (1) is thereby supplied to the rolls (2) of the smoothing mechanism with a moisture distribution which is characterized in that the moisture content in the inner layers of the paper is substantially smaller or at least as large as in the outer layers. This can be achieved with the aid of a dielectric paper web heating device (3) which is positioned in front of the rolls (2) of the smoothing mechanism. Through the invention less energy is to be required for the same smoothness values and a lower reduction in volume is to take place.

Abstract: The end portions of a rotary shell forming part of a calendar roll can be heated or cooled by a suitable (gaseous or hydraulic) fluid which is admitted into axially parallel first channels of the shell. Such channels can extend from end face to end face of the shell or only in the region of one end face each. The first channels receive the fluid from second channels which extend radially inwardly to the internal surface of the shell, and spent fluid is admitted into third channels which extend from the respective first channels to the internal surface of the shell. The first channels accommodate axially adjustable throttles which are used to regulate the rate of fluid flow in the shell and to thus regulate the temperature of the respective end portions of the shell.

Abstract: In a rotary printing press with a printing cylinder and a counter roller, such as an impression cylinder, for example, and a print web guided between them, faultless print quality across the entire width is attained, even with an extremely wide print web and a correspondingly slim printing cylinder. The printing cylinder is provided with a fixed support and a jacket, which is rotatable around it, and is supported by a row of support elements with a printing pressure which is controlled individually or in groups. With this arrangement, a uniform printing pressure profile across the print web width and, simultaneously, a print gap which is generally uniform are attained. Deformations and displacements of the printing cylinder jacket cross-wise to the printing plane are avoided in that additional cross-bracing elements for exerting a restoring force on the printing cylinder jacket cross-wise to the printing plane are provided.

Abstract: A process for the guiding of fibre web or the like, in particular for paper production, especially in paper driers, wherein the suction applied can be varied both in real time operation and along the axes of the one or more suction rolls that is/are present and which may be used in conjunction with at least one travelling screen or the like. The object is to make the start-up process for the treatment of fibre webs on suction rolls more convenient without too much equipmental and operational overhead, and to prevent shrinkage of the web by providing good location at the web in the edge regions. This is achieved by restricting the suction which acts on the inside of the roll jacket to a region of the roll jacket which comes into contact with a lead-in strip for the fibre web during start-up operation. This process is continued until a sufficient length of fibre web has passed over the suction roll for the web to have reached its full or final width on this suction roll.

Abstract: The suction roll, especially for a paper web drier, comprises a perforated roll shell containing therein an internal chamber partitioned by a wall member transversely arranged with respect to the lengthwise axis of the suction roll. A connection flow communicates the interior of the suction roll with a suction device, preferably a vacuum pump. At least one blade or vane within the suction roll at least reduces or prevents a possibly arising rotational or cyclone-like flow. Thus, the pressure differential brought about by the suction device can be completely used for creating the suction action and for fixing the paper web at the suction roll. This rotational or cyclone-like flow particularly occurs when the suction action is applied through a hollow shaft or duct.

Abstract: A printing cylinder for a rotary printing press has a support, which is fixed against relative rotation, and a jacket rotatable around the latter, which is supported by a row of support elements, disposed axially side-by-side and individually controllable and radially displaceable at least in part in order to attain an even printing pressure across the width of the cylinder while avoiding any bending of the jacket. The jacket is constructed of three coaxial tubes, an interior tube, a filler body and a printing forme support, at least two of which, or even all three, in the rest state, are separated by a small gap so that they can be easily pulled off each other and exchanged in order to change the printing press over to another print pattern or another diameter or register.

Abstract: In a water turbine having a distributor with adjustable guide vanes and a runner having adjustable runner blades, optimization of the operating parameters is performed indirectly in that fluctuations in intensity of the generator output or the bearing oscillations of the water turbine are determined without taking account of the absolute values and are set or adjusted to a minimum.

Abstract: In order to regulate dewatering of the fiber suspension and the formation of the paper web between the upper and lower wires of the papermaking machines, upper ledges are provided along with the upper wire. These upper ledges are particularly constructed so as to have uniform design. Between these upper ledges, there is left free the same distance or spacing. This distance is not smaller than the width of each upper ledge. The individual distances between the upper ledges can be closed by insertable inserts so that the dewatering can be forcibly accomplished at mutually separated zones. Along the lower wire, there are provided lower ledges at a table, and between these lower ledges, it can be adjusted varying distances or spacing therebetween. The mutual distance or spacing between the lower ledges, according to a favorable construction, is always greater than the width of the individual upper ledges plus the distance or spacing of an upper ledge from the next neighboring upper ledge.

Abstract: The invention has as its object the provision of a method and an apparatus for the generation of smoothness and gloss on paper which essentially precludes a re-erection of the surface fibers after the smoothing process. This is achieved in that the surface of a paper web (1) to be smoothed is heated to a temperature above the glass transition temperature of the fibers at the surface of the web without subjecting the web to a press nip, and then these fibers are deformed and fixed in the deformed state in a subsequent process step under the simultaneous action of pressure with shock cooling. Accordingly, there is associated with each surface of the paper web (1) to be smoothed a heating device (2) and also a subsequent cooled body (5, 9, 10) which presses against the surface.

Abstract: In a turbo machine with magnetic bearings on both sides and dry gas seals for the rotor, the axial thrust acting upon the rotor and generated by the pressure difference between the pressure side and the suction side is compensated for in that a dry gas seal provided on the suction side and the end of the shaft are acted upon by a certain pressure, which generates a compensating axial thrust, so that the resultant axial thrust becomes as slight as possible. Advantageously, this pressure is regulated via the bearing gap of an axial magnetic bearing of the rotor such that the bearing gas assumes a predetermined value.

Abstract: The press section of a papermaking machine for dewatering a paper web comprises two separate, successively arranged extended nip press locations. Both of the extended nip press locations contain at least one respective felt which travels together with the paper web through the associated extended nip press location. The paper web is guided from the first extended nip press location to a web removal device contacted by an upper felt of the second extended nip press location, and from that location the paper web can move to the second extended nip press location.