Abstract: Calender and process for operating the calender, calender roll and process for forming the calender roll, and a coating for the calender roll. The calender includes at least one calender roll body, and an elastic coating coupled to the at least one calender roll body. The elastic coating includes a colorant to change a color of the elastic coating depending upon a temperature of the elastic coating. The calender roll includes an elastic coating with a colorant, and the elastic coating is adapted to change color depending upon a temperature of the elastic coating. The process for forming the calender roll includes forming an elastic coating that includes a colorant, whereby the elastic coating changes color depending upon a temperature of the elastic coating, and applying the elastic coating to a calender roll body.

Abstract: A dry end of a machine for manufacturing a material web, in particular a paper or cardboard web, includes at least one convection drier, having at least one drying section. The material web passes through the at least one drying section, and is guided between two air-permeable wire belts.

Abstract: A calender roll system and method for operating the same. The calender roll system includes a roll stack having at least one center roll positioned between two end rolls, in which each of the at least one center roll and the two end rolls have a drive mechanism, and in which the rolls can be loaded in a stacking direction. The method includes loading the rolls to form at least one working nip with at least one center roll, and, in the at least one working gap, bending the at least one center roll out of the plane of the roll stack. Reaction forces required to bend the at least one center roll are generated by corresponding adjustment of drive moments of the at least one center roll.

Abstract: Machine and process for producing a fiber material web that includes at least one press device having a shoe press unit and a drying drum, such that the shoe press unit and the drying drum are positioned to form an elongated press nip. The machine also includes at least one belt that is water-permeable and water-absorbent and that is adapted to guide the fiber material web through the press nip, and at least one suction device located ahead of the elongated press nip, relative to a belt travel direction. The at least one belt is guided over the at least one suction device. The process includes guiding the at least one belt over the at least one suction device and suctioning the at least one belt, such that moisture is removed from the at least one belt, and guiding the fiber material web and the suctioned at least one belt through the extended press nip.

Abstract: Winding apparatus and method for transferring a web of material from a wound roll to a winding tube. The method includes applying an adhesive surface onto a severing region of the material web that surrounds a circumferential portion of a carrier roll, lifting the severing region of the web of material away from the carrier roll, and severing the web of material within the severing region. The winding apparatus includes two carrier rolls arranged to form a winding bed, a severing device, an adhesive applicator, and a retaining device including at least one roller segment that is switchable between two states.

Abstract: Calender for the treatment of a paper web including a roll stack of at least three rolls and with least one double-soft nip. The double-soft nip(s) are formed by two rolls, each with an elastic surface layer. At least one of the rolls forming the double-soft nip is heated. In a process using the calendar to treat a material web, the web is introduced into a roll stack having at least two rolls formed with an elastic surface layer over a rigid core, agglomerated in an elastic double-soft nip between the two rolls, heated to introduce energy into the material web and promote agglomerating, and smoothed in the elastic double-soft nip.

Abstract: Deflection compensating roll and method of use thereof. The deflection compensating roll comprises a carrier that is nonrotatably held by an outer bearing and is disposed within a roll shell. The invention also includes a plurality of hydrostatic support devices arranged about the outer surface of the carrier and support the roll shell. Also included is a hydraulic piston/cylinder unit having an actuating element, the outer bearing supported on the actuating element, the actuating element forcing the outer bearing toward a mating roll. A bearing surface intermediate the outer bearing and the actuating element is present, and at least one pocket located opposite the bearing surface and having a surrounding rim is also present. The pocket is connected by a restrictor to a pocket pressurized fluid source, and a gap is present intermediate the bearing surface and the rim, the pocket being further connected by a gap to an outlet.

Abstract: Cylinder that includes at least one stationary portion and at least one rotatable portion and a support and a method for sealing the same. The at least one rotatable portion includes a bearing axle rotatably coupled to the support, and the at least one stationary portion includes at least one stationary connection that is rotatably coupled to the bearing axle and that is adapted for at least one of inserting and removing at least one of a heating and cooling medium through the bearing axle. The cylinder also includes a sealing device that is composed of at least one brush seal and that is positioned between the at least one stationary portion and the at least one rotatable portion. The method includes rotatably coupling a bearing axle of a rotatable cylinder to a support. The bearing axle is fixedly coupled to a rotatable member and includes a channel adapted for at least one of insertion and removal of at least one of a heating and a cooling medium through the bearing axle.

Abstract: Calender for a web, process of forming the calender, and process of treating a web in the calender. The calender includes rolls having rotational axes and a roll stack composed of the rolls. The rolls of the roll stack are arranged such that the rotational axes are positionable in a horizontal plane. The calender also includes levers. The rolls include end rolls and middle rolls, the middle rolls being coupled to the levers. The calender also includes force devices positioned to exert a force on the levers. The process of forming includes arranging the rotational axes of the rolls in a horizontal plane, coupling levers to the middle rolls arranged between the end rolls of the roll stack, and coupling force devices to the levers. The process of treating the web includes guiding the web through the roll stack, pressing an end roll of the roll stack in a horizontal direction toward the other end roll of the roll stack, and adjusting a line load between adjacent rolls of the roll stack.

Abstract: A method for the treatment of a material web and a press arrangement with a plurality of press gaps. A roll has a flexible press jacket supported from an inside, and forms a respective press gap with each of at least two further driven rolls. The drive power, or speed of one of the driven rolls, is regulated in accordance with a predetermined desired value, to ensure a common speed of the driven roll. A maximum line force and/or drive power of a front press gap, considered in a web running direction, is controlled and/or regulated, at least within a certain range, in accordance with a maximum line force, or drive power, of a rear press gap, considered in the web running direction.

Abstract: The process is designed for the flotation of interfering materials from an aqueous fibrous pulp suspension and is in particular used in the processing of printed or used paper that is otherwise contaminated. The separation of gas bubbles of the suspension occurs in a flotation layer that has a maximum thickness of approximately 100 mm. The process also achieves good flotation results in fibrous pulp suspensions that have a fiber pulp content significantly larger than 1% by weight, for example around 2% by weight. A flotation apparatus is provided for performing the flotation process. The apparatus includes a flotation vessel, an inlet, an outlet, and a skimmer device.

Abstract: Device and method for handling a material web, in which the material web is guided by at least one smooth support surface and is then guided together with a porous support belt to a deflection roll includes a suction box. The suction box has a wall opposite from the porous support belt, and creates a vacuum that draws the material web from the support surface to the porous support belt. The device also includes at least one sealing element positioned near a front end, in the web travel direction, the sealing element cooperating with the porous support belt, and a vacuum zone in which the vacuum is provided. The vacuum zone adjoins a side of the porous support belt not contacting the material web and is defined between the porous support belt, the at least one sealing element, the wall of the suction box, and at its rear end, the deflection roll.

Abstract: Suction device and process for at least one of conditioning and drainage of an endless felt. The device includes a housing having at least one vacuum chamber, and a plurality of suction slits located on a suction surface of the housing that is adapted to face the endless felt. The plurality of suction slits are oriented to extend at least one of in and obliquely to a travel direction of the endless felt. The process includes guiding the endless belt over a suction surface of a vacuum chamber, and suctioning a surface of the endless belt with a plurality of suction slits located in the suction surface of the vacuum chamber. The plurality of suction slits extend in a direction that is at least one of in and oblique to a belt travel direction.

Abstract: Process for cleaning or maintaining the cleanliness of a low-consistency branch of a stock density-regulated headbox system including a constant part of a paper or cardboard machine having at least one high-consistency branch and one low-consistency branch, possibly sectioned. The final concentration output by the headbox onto a wire or between two wires is determined by a mixing ratio of high-concentration and low-concentration suspension flows. The process includes supplying the low-consistency branch with an increased content of solid particles. Headbox system including a constant part of a paper or cardboard machine, having a stock density regulation that is sectioned across the machine width by variably mixing a high-consistency suspension and a low-consistency suspension, with a high-consistency branch and a low-consistency branch. The headbox system includes at least one supply to the low-consistency branch for introducing solid particle contents into the suspension flow.

Abstract: Twin-wire former for producing a fibrous material web from a fibrous suspension and process for separating upper and lower wires of the twin-wire former. The twin-wire former includes a twin-wire zone composed of a lower wire and an upper wire and a plurality of rolls including an inlet roll and an outlet roll. The upper wire is guidable over the plurality of rolls, the inlet roll guides the upper wire to the twin-wire zone, and the outlet roll guides the upper wire toward the inlet roll. A wedge-shaped inlet zone is formed between the upper wire and the lower wire and has an adjustable inlet wedge angle. An upper wire subassembly includes a drainage box adapted to receive suspension water that flows upwardly through the upper wire, and further includes a pivotable common support device, to which the drainage box and the inlet roll are mounted. A stroke device is coupled to the pivotable common support device to lift the pivotable common support device around a first horizontal axle.

Abstract: In a device for direct or indirect single or double sided application of a liquid or viscid coating medium onto a moving surface with a scoop roll, a nozzle applicator device is positioned prior to the scoop roll relative to the direction of travel of the moving surface.

Abstract: Roll for a paper calender. The roll includes a core having opposed end faces and a barrel intermediate the opposed end faces, the barrel having a barrel region. Also included is an elastic cover extending over a working width of the core and a plurality of roller pins, each roller pin engaging a respective end face and having a pin region. Also provided is a temperature control device adapted to supply heat to and/or dissipate heat from the pin regions to a first temperature, and further adapted supply heat to and/or dissipate heat from the barrel region to a second temperature, wherein the first and the second temperatures are different. The present invention also provides a calender that employs such a roll having an elastic cover. Additionally provided is a process for operating such a roll having an elastic cover.

Abstract: Method and apparatus for monitoring a winding hardness of a winding roll when winding a material web. A series of marks are placed on the material web at a first location as it is wound onto the winding roll. The distance between two successive marks is detected at a second location. The detected distance of two successive marks is used to determine a stretch of the material web.

Abstract: A reel cutter for a material web and method of using the same that includes an inlet section, an outlet section, and a cutting device. The cutting device is between the inlet section and the outlet section. The cutting device contains an edge cutting device disposed in a region of at least one edge of the material web for producing at least one edge strip. The reel cutter is associated with a tensioning device that acts on the at least one edge strip.

Abstract: Process for setting a uniform characteristic cross-direction profile for a paper web with regard to at least formation, basis weight, and fiber orientation in a paper machine. The paper machine can include a headbox with an adjustable die exit opening and within which the consistency is sectionally adjustable. The process includes measuring and setting a desired basis weight cross-direction profile by adjusting the sectional consistency in the headbox, adjusting the formation cross-direction profile by adjusting a sectional, specific pulp slurry flow rate at the die exit opening, and one of enlarging the die exit opening at positions along a width of the paper machine in which a pulp slurry flow rate is higher than in other positions along the width of the paper machine and increasing the pulp slurry flow rate for positions along the width at which the die exit opening is larger than at other positions along the width. In this manner, a desired fiber orientation cross-direction profile is attained.