Abstract: A device to clean a transport belt of a machine for manufacturing a material web, in particular paper or cardboard web, is provided which includes at least one nozzle that can impart a medium under pressure and is designed to rotate on a rotational axis. The device is characterized in that the rotational speed of the nozzle for a gentle cleaning of the transport belt lies in the range of from about 2500 rpm to about 4000 rpm, and for an intensive cleaning of the transport belt in the range of from about 1000 rpm to about 2500 rpm.

Abstract: A device for cleaning a conveyer belt, in particular a dry or wet sieve belt or a felt belt, of a machine for manufacturing a material web, in particular a paper or cardboard web, is disclosed. At least one nozzle that can be directed toward the conveyer belt for spraying this conveyer belt with a gaseous or liquid agent is provided, and the device also includes a bell-shaped cleaning hood surrounding the cleaning nozzle in a sleeve-shaped manner. At least one additional nozzle is provided in peripheral regions of the bell-shaped cleaning hood. A process for cleaning a conveyor belt of a machine utilizing the above device is also provided.

Abstract: A device for cleaning a transport belt of a machine for manufacturing a material web, in particular a paper or cardboard web, is provided which includes at least one cleaning nozzle working in conjunction with a suction chamber. Thus, the transport belt can be imparted upon with a cleaning medium; and a suction device that is connected to the suction chamber also acts on the transport belt. The device includes at least one auxiliary nozzle from which a treatment medium, preferably fluid, serving to clean the suction device can be introduced into at least one of the suction chamber and a suction line of the suction device.

Abstract: The invention relates to a dry end for drying a material web, in particular a paper or cardboard web, having at least one drying group with a plurality of drying cylinders and web guiding rollers and at least one nozzle device for transporting the threading part of the material web along a winding path by means of at least one conveyor band. The dry end is characterised in that groups of at least two nozzle devices (17, 19, 21) located at the same side of the material web (11) follow each other in the direction of transport of the material web (11).

Abstract: A process for cleaning a transport belt of a machine to manufacture a material web, in particular a paper or cardboard web, is provided so that the transport belt is cleaned with varying intensity across its width.

Abstract: The invention proposes a jet device for a machine for producing a material web, in particular a paper or board web, having a nozzle device for dispensing a jet of liquid which is under pressure and is directed onto the material web and/or a transport belt guiding the material web. A changeover device by which the pressure with which the medium impinges on the transport belt or the material web, respectively, can be set.

Abstract: The invention is directed to a dryer section for an apparatus to produce a continuous material layer, such as paper, carton or cardboard. At least one dryer group has a plurality of dryer cylinders and guiding rollers. The dryer cylinders and guiding rollers carry the material layer along a meandering path, with each dryer cylinder and each guiding roller having a first side disposed on a same side of the dryer section. At least one mechanical drive mechanism is provided, with each drive mechanism being coupled with the first side of a dryer cylinder and/or guiding roller. A plurality of supply tubes are each connected with the first side of a corresponding dryer cylinder and/or guiding roller.

Abstract: A strip severing device for a feed strip to be threaded in a machine for producing or processing a paper web. The device has a swingably mounted guide plate for the guiding of the feed strip selectively toward or away from a web separating device. The separating device has a support element which can be rotated. It carries at least one flexible or flexibly supported separating element which swings out from a position of rest into an operating position in which it severs the feed strip coming from the guide plate.

Abstract: The dryer section of a machine for manufacturing a paper web includes at least one and more usually a plurality of heatable drying cylinders, each of which is wrapped over a part of its circumferential surface by the web of material to be dried. A support belt is guided by guide rolls to wrap over a part of the circumference of each of the drying cylinders and over the web. A pressing device presses against the support belt to press the web of material against the drying cylinder. That pressing device may comprise a pressure box outside the support belt to which air or steam pressure is applied. The pressure box may include several zones either along the web path or transverse to the web path permitting different pressures to be applied. The pressing device may alternately comprise a plurality of pressing rolls extending transversely to the web axis and parallel to the drying cylinder axis and being biased against the support belt, e.g.

Abstract: The invention relates to a device for cleaning a moving transport belt in a papermaking machine, for instance a dry or wet wire belt or a felt belt, having at least one nozzle which can be directed against the transport belt for spraying the woven belt with liquid or gaseous fluid. A suction chamber 18 surrounds and cooperates with the cleaning nozzle (8), so that dirt and/or water mist detached by the nozzle jet (27) from the transport belt (4) or residual water are drawn into the suction chamber (18) and led away, avoiding dirtying or contamination of the nearby area.

Abstract: A drying section for a paper making machine. The drying section includes a plurality of single-tier dryer groups, optionally followed by one or more double-tier groups. To control curl in the final paper product, a moistening device extending over the width of the drying section is provided near the end of the single-tier dryer groups. The moistening device can be divided into various zones to control the profile of the paper. Alternatively, or in addition to the moistening device, a contact-less dryer such as a infrared dryer can be provided after the dryer section, upstream of a calendar section of the paper making machine. The moistening device can be provided to moisten the bottom or, optionally, the top side of the paper web. Where a double-tier dryer group is provided, to control curl the upper drying cylinders and the lower cylinders can be provided with different steam pressures to control curl. Alternatively, each of the cylinders can be individually controlled.

Abstract: A drying section includes a plurality of single-tier dryer groups, optionally followed by one or more double-tier groups. To control curl in the final paper product, a moistening device extending over the width of the drying section is provided near the end of the single-tier dryer groups. The moistening device can be divided into various zones to control the profile of the paper. Alternatively, or in addition to the moistening device, a contact-less dryer such as a infrared dryer can be provided after the dryer section, upstream of a calender section of the paper making machine. The moistening device can be provided to moisten the bottom or, optionally, the top side of the paper web. Where a double-tier dryer group is provided, to control curl the upper drying cylinders and the lower cylinders can be provided with different steam pressures to control curl. Alternatively, each of the cylinders can be individually controlled.