Abstract: In a coating method for direct or indirect application of a coating medium onto a moving surface, the amount of coating medium dispensed by an applicator device within a given time period and the actuating force that is exerted on the metering element, in order to achieve a coating layer of a desired coating weight, are altered independently of each other. In a relaxation operation mode, the amount of coating medium applied within a given time period is reduced when the coating weight exceeds a desired value; when the coating weight falls below the desired value, the actuating force exerted on the metering element is reduced. In a contact pressure based operating mode, the amount of coating medium applied within a given time period is reduced when the coating weight exceeds a desired value; when the coating weight falls below the desired value the actuating force exerted on the metering element is increased.

Abstract: Winding device and process for winding wound rolls. The winding device includes a pressure roll axially divided into separate sections and a winding arrangement. The pressure roll is arranged to be placed on the winding arrangement. A coupling device is arranged to axially couple the separate sections together, and a drive unit is arranged to commonly rotatably drive the axially coupled separate sections. The process includes axially coupling the separate sections of the pressure roll together with the coupling device, rotatably driving the axially coupled separate sections, and pressing, at a beginning of a winding procedure, the separate sections of the pressure roll against the wound rolls.

Abstract: A process for presetting a calender for a material web and a calender. The calender includes a roll stack having at least a first nip and a second nip arranged to define a stack plane and comprising a sag compensation lower roll having a rotationally secured carrier which can be moved along the stack plane by external support devices arranged at both ends of the lower roll, the lower roll having a jacket which is supported on the carrier by internal support devices wherein the jacket can be adjusted along its entire length in the direction of the stack, the calender further comprising at least one middle roll which can be adjusted in the stack plane and a sag compensation upper roll having a carrier which is held stationary at its ends and a jacket which supported on the carrier by internal support devices, the jacket being mounted to the carrier at its ends.

Abstract: Measurement system and process for measuring a cross-direction profile of specific properties of at least one of a material web and a coating on the material web. The system includes at least one stationary cross-direction profile measurement device having at least one radiation source adapted to irradiate the at least one of the material web and the coating on the material web in a plurality of defined and different wavelength ranges, and at least one sensor adapted to measure the intensity of radiation affected by the at least one of the material web and the coating on the material web. The system also includes at least one measurement and/or evaluation electronics system. Each sensor detects only one of the defined different wavelength ranges of the radiation at a specific point in time.

Abstract: Device and process for controlling or regulating a basis weight of a web in a web manufacturing process of a web producing machine. The device includes a first control circuit, adapted to adjust the basis weight, that includes at least one adjustable device for influencing the basis weight and at least one basis weight sensor. A second control circuit having at least one sensor for detecting a concentration of incoming backwater is also provided. The process includes measuring the basis weight of the material web, adjusting the basis weight of the web with a first control device having at least one device for influencing the basis weight, detecting a retention change in a second control circuit, and counteracting the retention change by influencing a concentration of a stock suspension placed one of onto a wire and between wires.

Abstract: Roll and process for producing roll including a hard roll core, and a resilient covering layer, including a matrix material, located on an outer side of the hard roll core. The matrix material includes a soft metal. The process includes producing a matrix material comprising a soft metal, and applying the soft metal matrix material onto an outer side of the hard roll core, thereby forming the resilient covering layer.

Abstract: A roll for smoothing of a material web and a process for making the roll. The roll includes a hard roll core having an outside surface, and an covering layer includes an elastic matrix material and disposed on the outside surface, wherein the covering layer is rotationally fixed and longitudinally displaceable on the hard roll core. The process includes applying the covering layer on the outer surface of the hard roll core, wherein the elastic covering layer is rotationally fixed and longitudinally displaceable on the outside surface of the hard roll core.

Abstract: Apparatus and process for guiding portions of backwater produced or stored at different levels of a machine. The apparatus includes an upper backwater chamber arranged to receive first backwater, a lower backwater chamber arranged below the upper backwater chamber and to receive at least a portion of the first backwater from the upper backwater chamber. A plurality of hydraulic lines are arranged to couple the upper backwater chamber to the lower backwater chamber, and inlet openings of the plurality of hydraulic lines are arranged inside the upper backwater chamber and are arranged at different geodetic heights relative to one another. The process includes collecting first backwater in an upper backwater chamber, and guiding the first backwater from the upper backwater chamber to a lower backwater chamber through inlet openings to a plurality of hydraulic lines. The inlet openings are arranged at different geodetic heights relative to one another.

Abstract: Process and apparatus for drying a material web. The process includes guiding the material web to at least one heated area having a jacket surface of a cylinder having a diameter of between about 4-10 meters, setting the material web, having a dry content of between about 45-55%, onto the at least one heated area, maintaining the material web in uninterrupted contact with the at least one heated area at least until the material web achieves a firmness sufficient for detaching the material web from the heated area, and detaching the material web from the at least one heated area with a dry content of between about 55%-65%.

Abstract: Linear drive apparatus and process of using the same. The apparatus includes a movable device and a first high-speed thrust device coupled to the movable device. The first high-speed thrust device exerts an acceleration force on the movable device to move the movable device from a ready position. A movable retaining device is coupled to the movable device, so that the retaining device is adapted to hold the movable device in the ready position against the acceleration force. A release of the movable retaining device triggers immediate movement of the movable device via the acceleration force. The process includes positioning the movable device in an idle position, holding the movable device in the idle position with the retaining device, exerting an acceleration force on the movable device while it is being held in the idle position, and releasing the movable device from the idle position by moving the retaining device. In this manner, the acceleration force moves the moving device.

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: In a method of application of a coating medium by use of a spray device onto a moving surface, which in the direct application method is the surface of a material web, specifically a paper or cardboard web, an atmosphere of back-moistening and/or moistening medium for the atomized coating medium is maintained in the area of the spray device.

Abstract: Headbox for one of a paper and cardboard machine includes at least one material suspension supply running a width of the machine. At least one turbulence producer has at least one conduit through which a material suspension flows. At least one metered addition point is located in the conduit for introducing a fluid medium. A headbox nozzle is located downstream from the at least one turbulence producer for delivering the material suspension. A portion of a flow resistance located downstream of the metered addition point is at least approximately 50% of a total flow resistance of the at least one conduit.

Abstract: Apparatus and process for determining the properties of a material web. The apparatus includes at least one radiation source, and at least one detection device adapted to detect radiation emitted from the at least one radiation source that at least one of penetrates and is reflected by the material web. The detection device can include at least one detection area unevenly divided into a plurality of individual sensors. Further, the material web can be a paper web. The invention relates to a device and a process for determining the properties of a material web, particularly a paper web, having at least one radiation source and at least one detection device for radiation that is emitted by the radiation source and that penetrates and/or is reflected by the material web, said detection device having at least one detection area unevenly divided into a large number of individual sensors.

Abstract: Backwater cycle of and process for circulating water in a paper machine having a wet zone. The backwater cycle includes at least one application device arranged to apply a composition containing at least one of pigment and filler onto a fiber web in the wet zone, a first backwater cycle that supplies a stock inlet with backwater removed from the production process upstream, relative to a web travel direction, of the at least one application device, and a second backwater cycle that accepts a remainder of the backwater. The process includes extracting backwater from the fiber web, and feeding backwater, which is not charged with the at least one of pigments and fillers, to a stock inlet.

Abstract: Application device for a paper machine, a paper machine, a nozzle dampener, and a process for improving the surface of offset paper. The application device includes a plurality of nozzles distributed across a machine width as at least one row of nozzles, such that the plurality of nozzles are oriented to spray a passing paper web. The at least one row of nozzles is adapted for an alternative selective throughput of water and binding agent. The paper machine includes the application device. The nozzle dampener includes a plurality of nozzles distributed across a machine width as at least one row of nozzles, such that the plurality of nozzles are oriented to spray a passing paper web. The at least one row of nozzles are adapted to improve paper properties of offset paper by applying a binding agent onto the passing paper web.

Abstract: Process for transferring at least a portion of a running web from a first section of a web making machine includes rotating an endless conveyor belt by driving at least one driven pulley, creating a negative pressure at an inner surface of endless conveyor belt as endless conveyor belt is guided over suction box, and guiding the at least a portion of running web onto endless conveyor belt. Process also includes transferring the at least a portion of the running web from endless conveyor to rope section located outside of a web width, pivoting endless conveyor belt around the pivot axis to move downstream end into an area of rope section one of at and before transferring, and pivoting endless conveyor belt around pivot axis to move downstream end into an area of the at least a portion of running web and inside web width.

Abstract: A process and a device for drying and smoothing a web. The process uses an apparatus including at least one dryer section having a plurality of heated cylinders and a calender having a plurality of smoothing nips, and includes guiding the web over the plurality of heated cylinders in the at least one dryer section, drying the web in the at least one dryer section to a maximum dry content of approximately 93%, adjusting a moisture cross-profile of the web in the dryer section, and guiding the web to the calender. The device includes a dryer section comprising beginning, middle, and end sections, a calender, and at least one adjusting device located in the end section for moistening the web, wherein the web is guided through the dryer section prior to being guided to the calender.

Abstract: Heated cylinder and process of using same for heating a fibrous material web in machines for one of producing and refining the fibrous material web. The heated cylinder includes a cylinder jacket having an outer jacket layer with good heat conductivity, a heat insulating layer positioned contiguous to and inside of the outer jacket layer, and at least one heating system positioned outside the cylinder jacket adapted to heat at least a surface of the cylinder. The process includes heating a surface of the cylinder to a temperature between about 120 and 250° C. with the at least one heating system, and guiding a material web over a portion of the surface of the cylinder such that the material web contacts the surface of the cylinder for a period of at least about 50 ms.

Abstract: Process and apparatus for influencing web characteristic in a machine for producing a fibrous web. The process includes guiding the fibrous material web in a still-wet state and stretching the still-wet state fibrous material web in a crosswise direction. The apparatus includes a stretching device arranged to stretch the fibrous material web in a still-wet state in a direction crosswise to a travel direction.