Abstract: A method for winding a web onto a spool at least partially supported on a support roll in which the web passes through a nip formed between the support roll and a roll formed by the web winding on the spool. The roll being formed is loaded and/or supported by at least one loading/supporting unit which is/are displaced during initial winding stages in a direction substantially in a plane passing through a central axis of the support roll and a central axis of the roll being formed. Thereafter, the loading/supporting unit(s) is/are displaced in a direction substantially along a path parallel to a circumference of the roll being formed, and during final winding stages, the loading/supporting unit(s) is positioned to support the roll being formed from a bottom region thereof.

Abstract: An arrangement and method for transferring a paper web in high-speed paper machines having a press section arranged between a web former and a dryer section. In the press section, there is one or more press nip zones dewatering the web, at least the last one of which is preferably an extended nip through which at least two press fabrics that receive water are passed. The web is passed between the press fabrics through the last extended-nip zone so that the draining of water out of the web takes place through both faces of the web. After the last press nip zone, the web follows one of the fabrics passing through the last extended-nip zone by the effect of a difference in pressure avoiding rewetting of the web. The fabric carrying the web is passed through a gently loaded transfer nip zone in which the web is transferred onto a transfer surface more adhesive than the face of the fabric.

Abstract: A method and arrangement in winding of a web, in particular a paper or board web, in which the web is wound onto a first roll spool to form a first roll. When the first roll is complete, first and second edges of a material strip having a set length in a running direction of the web are attached to the web at first and second fixing points, respectively, at a location before the web is wound about the first roll spool such that the length of the web between the first and second fixing points is less than the length of the material strip. The first and second edges of the material strip extend in a direction substantially transverse to a running direction of the web.

Abstract: The invention relates to a method of and an apparatus for drying a fiber web, whereby the fiber web (5) is dried in a cylinder drying unit (12) and in a band drier unit (11). The cylinder drying unit (12) and the band drier unit (11) are arranged one above the other. A considerable space saving is then achieved and the building costs remain rather moderate. Simultaneously, a remarkable addition to the drying capacity is achievable by moderate investments by means of existing apparatuses, for instance. (FIG.

Abstract: An arrangement for a drying cylinder in a paper/board machine including a steam, condensate and/or water coupling. The coupling includes a steam pipe through which steam is passed into an interior of the drying cylinder, a condensate pipe through which condensate is removed from the interior of the drying cylinder, a unitary coupling frame arranged in connection with an end of the cylinder and including an exhaust connection coupled to the condensate pipe, an annular groove arranged in a face of the coupling frame facing toward the drying cylinder, and at least one spring socket opening into the annular groove, the arrangement also includes a revolving axle arranged at one end of the drying cylinder through which the steam and condensate pipes are passed, a bearing housing for rotatably supporting the axle, a piston arranged in the annular groove of the coupling frame, and at least one spring arranged in a respective spring socket of the coupling frame to press the piston against a portion of the axle.

Abstract: A web finishing section in a paper machine including a dryer section having one or more dryer groups, a calender and a reel-up. The calender is placed at least partly underneath the reel spool storage space of the reel-up so that the reel-up is placed substantially directly after the calender, in which case, the web is passed directly from the calendering nip onto the reel cylinder or to a substantially short distance from the calender, the web being passed over one guide member that supports and/or spreads the web onto the reel cylinder. A method for finishing a web is also described.

Abstract: A regulation system and method in a paper machine for controlling the variation of the basis weight of a paper web in the machine direction in which the basis weight profile of the web is measured by means of a measurement device and a basis weight regulation system receives a signal of the measurement of the basis weight from the measurement device and generates a regulation signal for controlling the flow of thick stock passed into a short circulation circuit in the paper machine by a basis weight valve and/or a regulation pump. The variation of the basis weight in the machine direction in the paper machine is controlled, besides by the short circulation circuit of regulation, also by a substantially faster second circuit of regulation which comprises one or more actuators for controlling the flow rate of the dilution water flow in the dilution profiling system of the headbox and/or the consistency of the dilution water flow across the entire width of the paper web.

Abstract: A method for improving rotation of a rotating roll body by reducing imbalance of the roll, reducing elastic asymmetry of the roll, or both, without increasing either, by forming one or more new grooves in the roll body or changing the size of one or more existing grooves.

Abstract: A calender is provided for calendering a fibrous web wherein the moisture profile of the web can be controlled. The calender includes a plurality of rolls wherein at least one of the rolls comprises a profiling roll. The profiling roll has a plurality of profiling zones extending in a cross-machine direction to define a profiling nip. The roll is independently expandable in each of the zones, such as by an internal pressurized shoe arrangement, so that the pressure in the profiling nip can be varied in the cross-machine direction. A waterbox is positioned adjacent to the profiling nip and water is carried directly into the profiling nip where at least a portion of the water is transferred to the web such that the moisture profile of the web can be varied in the cross-machine direction by varying the nip pressure in the respective profiling zones.

Abstract: The invention relates to a method of and an apparatus for drying a fiber web, whereby the fiber web is dried in a cylinder drying unit (12) and in a band drier unit (11). The fiber web (5) is led from the cylinder drying unit (12) to the band drier unit (11) in such a way that it is easy to determine a desired dry content for the fiber web (5) in the cylinder drying unit (12) when the fiber web (5) is transferred to the band drier unit (11).

Abstract: A paper machine roll, in particular for a soft calender or supercalender, which includes a metal frame, roll ends, and shafts. The frame is coated with a polymer coating over at least a middle area or central region thereof while lateral regions may optionally remain uncoated. In order to equalize a difference in temperature between the roll ends and the optionally non-coated lateral regions of the metal frame, on one hand, and the coated central region area of the roll, on the other hand, an arrangement for equalizing the difference in temperature is provided by heating the roll ends and the optionally non-coated lateral regions of the metal frame.

Abstract: A method for drilling holes into a mantle of a cylinder of a paper machine while the cylinder is in its site of operation in the paper machine. The holes are drilled into the cylinder mantle by a drilling device having drill bits and which is transferred after each drilling cycle to the next drilling position. When drilling the holes, the device is supported on cylinders placed adjacent to and above the cylinder to be machined and/or on the cylinder to be machined by fastening supports of the device. Before the drilling is started, the device is locked in its position by locking fastening supports in a desired position and, the holes are drilled into the cylinder placed underneath from the top toward the bottom.

Abstract: A method for drying a surface-treated paper web or equivalent in an after-dryer of a paper machine in which the paper web is first finished in a finishing section, e.g., surface-sized or coated, by a finishing device and then dried. In the after-dryer, the paper web is dried in at least one dryer group employing a normal single-wire draw and, in connection with or after the drying, the paper web is treated by at least one device in order to compensate for a tendency of curling of the paper web. The after-dryer is arranged after the finishing device and includes at least one dryer group that applies a normal single-wire draw so as to dry the paper web and one or more devices for compensating for a tendency of curling of the paper web.

Abstract: A method and apparatus for applying a coat mix to a high-speed running board or paper web by accurately premetering and pre-smoothing the applied coat with an applicator apparatus and then minimally doctoring the applied coat with an air knife. The applicator apparatus has a narrow slot-orifice extending in a cross-machine direction for facilitating high-speed laminar flow of coating mix into a gap region defined by confronting surfaces of the applicator apparatus and the web. The applicator apparatus has a member for directing the ejected coating mix in the gap region in a direction reverse to a travel direction of the web so that only a predetermined portion of the ejected coating mix is allowed to form an applied coat on the web. This accurate premetering of the coating mix by the applicator apparatus permits an operator to readily optimize the subsequent process of doctoring the applied coating with an air knife.

Abstract: A reeling device including a reel drum supported on reeling rails and around which a paper web is reeled into a reel through a reeling nip defined between a set of belt rolls and the reel. The set of belt rolls extends in the cross direction substantially across the web width. A method for reeling or unwinding a paper web in which the paper web is reeled around a reel drum supported on reeling rails into a reel or unwound from the reel by means of a reeling nip. The paper web is reeled through the reeling nip which is formed between at least one set of belt rolls extending in the cross direction substantially across the web width and the reel that is being formed/unwound.

Abstract: An apparatus for reducing or preventing vibrations of a roll set of a paper making apparatus, wherein the roll set comprises at least two rolls of which at least one is a soft roll coated with a compressible coating and comprising a temperature control system. The natural vibrational frequency of the roll set is changed during the operation of the apparatus by changing the temperature of the coating of the at least one soft roll. The changing of the natural frequency prevents resonance on a natural frequency of the roll set.

Abstract: A method and apparatus for heating a paper web in a calender in which the paper web is heated before it is passed into a calendering nip of the calender. The paper web is heated by a source of radiation and the heat radiation coming from the source of radiation is condensed and guided by a reflector face or an equivalent optical device onto the paper web and/or onto a face of one of the rolls in the calendering nip substantially directly before the calendering nip.

Abstract: A dryer section of a paper machine which is provided with at least one intermediate calendering nip and includes several successively arranged wire groups. The dryer section primarily or exclusively has groups with single-wire draw in which heated drying cylinders are arranged in an upper row and reversing suction cylinders or reversing suction rolls are arranged in a lower row below the upper row. The groups with single-wire draw also have a drying wire which runs along a meandering path over the drying cylinders and reversing suction cylinders or rolls so that the reversing suction cylinders remain inside the loop of the drying wire. Two calender rolls are arranged to form the calendering nip through which a paper web to be dried is passed, and thus calendered inside the dryer section, immediately preceding or following or within one or more of the dryer groups of the dryer section.

Abstract: A method for fitting a roll mantle of a tubular roll used in a paper machine or equivalent with glide bearings and a tubular roll. The roll mantle is supported on a stationary roll axle by hydraulic glide bearing elements acting upon the roll mantle and/or upon the roll ends. The bearing elements are loaded hydraulically by the pressure of a first pressure medium. The roll is loaded from outside radially in the direction of at least one plane, i.e. in a so-called principal loading direction. The roll mantle is supported on the roll axle by the glide bearing elements which act radially substantially in the principal loading direction in opposite directions and which are provided with a device for regulating the braking pressure provided by a second pressure medium, so that in the principal loading direction, the roll mantle is allowed to move over a certain distance.

Abstract: A method for winding a paper web in which the paper web is wound by a winder or equivalent winding apparatus onto a roll and the running speed of the winder is controlled based on the frequency of rotation of the roll so that when the frequency of rotation of the roll approaches a range of oscillation, i.e., a range of frequency of rotation of the roll in which intensive oscillation occurs, the running speed is lowered quickly so that the frequency of rotation of the roll is reduced to a level lower than the lower frequency of the range of oscillation. Thereafter, the running speed of the winder is increased so that the frequency of rotation of the roll remains substantially constant until, e.g., the running speed of the winder prior to the reduction thereof as the frequency of rotation of the roll approached the range of oscillation is reached.