Abstract: A web drying apparatus, e.g., for a paper web, includes several heatable drying cylinders arranged in at least one row with at least one respective endless loop drying wire and preferably arranged in two rows of cylinders with two respective wires. A wire guide roll is between and offset from two of the adjacent cylinders in the one row. The one endless loop dryer wire carries the web thereon on a first part of the web loop path from the first cylinder to the wire guide roll. There the web separates from the wire and travels to a second cylinder in the second row. The wire wraps around the wire guide roll and returns on a second part of the web loop path to the next cylinder in the first row, without supporting a web. On the path between the first and third cylinders and around the wire guide roll, the wire defines a loop. An air guide box and a blower are arranged within the loop. The air guide box produces a vacuum at the first part of the wire loop path for drawing the web against the wire.

Abstract: A suction box for use in a press arrangement in a machine for producing a paper or cardboard web. The suction box includes at least one suction side suctioning the fibrous pulp sheet onto a transport side of at least one felt belt. The suction box further includes at least one non-suction side and at least one slit. A vacuum is created by having air blown out of at least one slit. The vacuum occurs along the felt belt in a run direction of the felt belt. The slit is positioned at an edge of at least one non-suction side of the suction box. The suction box may be disposed on an exit side of a press slit of the press arrangement. The press slit is adapted to treat the fibrous pulp sheet. At least one felt belt is guided, simultaneously with the fibrous pulp sheet, through the press slit. Upon exiting the press slit, the fibrous pulp sheet is suctioned onto at least one felt belt by the suction box.

Abstract: A machine for manufacturing a continuous material web, in particular a paper or cardboard web, with at least one perforated cylinder sleeve and a suction roll exhibiting a manhole around which the material web is guided preferably with the aid of a transport band, whereby the interior of the suction roll can be put under a vacuum and is subdivided into at least two sections by a partition wall that is arranged essentially perpendicular to the rotation axis of the suction roll, wherein the partition wall is subdivided into sections and/or is manufactured of a flexible material and can thereby be inserted through the manhole and into the roll interior.

Abstract: A machine for the production of a continuous web, particularly of paper or cardboard, may include a plurality of rolls around which a continuous web may be guided. The machine may also include a blocking device, arranged in a vicinity of an edge of the continuous web, to prevent turbulences and arranged at a predetermined distance from a free stretch formed by the continuous web traveling between two adjacent rolls. The blocking device may extend along a longitudinal portion of the free stretch, i.e, in a transport direction of the continuous web, and/or may extend across a portion of the free stretch transverse to the transport direction of the continuous web.

Abstract: Device for drying a web in a two-screen dryer section. The device may include a plurality of heatable dryer cylinders arranged in vertically spaced upper and lower cylinder rows, an upper endless screen associated with the upper cylinder row and a bottom endless screen associated with the bottom cylinder row, and a screen guide roll associated with one of the upper and lower endless screens. A shaft may be formed between adjacent cylinders in a cylinder row and bounded by one of the upper and lower endless screens guided around the adjacent cylinders and the screen guide roll. An air box and a blowing device may be positioned within the shaft, and the blowing device may be arranged in a region of separation between the screen and the screen guide roll to direct an air flow through the screen. The device may also include a longitudinal sealing strip coupled to a surface of the screen guide roll in a vicinity of the region of separation.

Abstract: In a drying section of a paper making machine, the paper web is conducted through a plurality of single tier dryer sections and then transferred to at least one final double tier dryer section for completing the drying process. The paper web is threaded through the open draw between the single tier dryer sections and the double tier dryer section and through the open draws between the lower cylinders and the upper cylinders in the double tier dryer section by use of air jets which blow at the paper web from opposite sides thereof. The air jets include at least one jet which blows in a direction generally opposite to that of the paper web.

Abstract: In the initial region of the dryer section at least one of the dryer groups (23) is developed as a single-felt dryer group in which a single endless felt (F) and the web (9) travel alternately over cylinders (73) and guide suction rolls (73'). In the final region of the dryer section there is present at least one double-felt dryer group (24) in which a web (9) travels alternately over lower (74) and upper (74') cylinders. The single-felt group (23) has an automatic ropeless tail guide device (76, 79) for the threading of the so-called tail. In the double-felt dryer group (24) an automatic ropeless tail guide device (77, 78) is also present.

Abstract: In a papermaking machine, the drying section includes a vacuum based system which serves to guide the web and supporting felt (15) from a first drying cylinder (11) to a transfer vacuum roller (10), which has perforations (13) through which a vacuum is communicated into the interior of the roller 10 from of an external suction box (14). The suction box (14) includes lengthwise extending sealing strips (28, 29) located adjacent and bounding the free circumferential surface of the transfer roller (10), which is not overlapped by the felt of the drying section. The sealing strips extend from the suction box 14 to the roller mantel (10a) of the roller 10. These strips are further designed in the style of a doctor blade and are flexibly mounted on the suction box (14) so that they are flexible and biased against the roller 10 by spring action. They extend approximately tangentially to the surface of the roller mantel (10a), contacting it gently.

Abstract: In a two-wire cylinder dryer, the wire guide rolls are so arranged that the web and wire proceed jointly from the first cylinder to the wire guide roll. An air carrier box is arranged in the shaft contained between two cylinders. The air carrier box has an air channel connecting the area of the leaving point A with an opposite pressure zone. Hot air flows into the air channel through a driver nozzle, so that in the area of the leaving point there is a vacuum zone created which is outwardly bounded by a sealing strip. The pressure zone is bounded by further sealing strips.