Abstract: Apparatus for transferring at least a portion of a running web from a first section of a web making machine to a second section of the web making machine includes at least two pulleys, in which at least one is a driven pulley, a suction box coupled to a vacuum source, an air-pervious endless conveyor belt tensioned over the at least two pulleys to form a conveying run and a return run, and a device for creating a negative pressure at an inner surface of the conveying run. The at least one driven pulley is adapted to drive the endless conveyor belt over the at least two pulleys while the negative pressure propagates through the conveying run. The endless conveyor belt includes an upstream and a downstream end and the endless conveyor belt is pivotable around a pivot axis located in a region of the upstream end. The endless conveyor belt is pivotable to move the portion of the running web between the rope section and the portion is adapted to receive a full width of the running web.

Abstract: Process and apparatus for transferring a traveling material web into a target region. The process includes positioning at least two cutting mechanisms at one of a same and different width positions between web edges of a traveling material web. The at least two cutting mechanisms are movable relative to the traveling material web in a plane approximately parallel to the material web. The process also includes cutting the traveling material web at the one of the same and different width positions, thereby forming at least one resulting cut that extends approximately parallel to a web travel direction, and forming a substantially pointed beginning of a transfer strip by moving at least one of the at least two cutting mechanisms in a direction toward one of the web edges from its respective width position. In this manner, the resulting cuts of the at least two cutting mechanisms occur at one of a same and a substantially close proximity to a same width position.

Abstract: Press section of a machine and process for producing a fiber web. The press section includes at least two press nips arranged in succession in a web travel direction. Each of the at least two press nips is formed by two press rolls. At least one continuously revolving press belt is guided around each press roll. At least one of before and after at least one of the at least two press nips, a guide region is formed in which two of the press belts are arranged to run jointly along a straight path, and the fiber web is adapted to run between the two press belts along the straight path. Guide elements are arranged at an end of each guide region. At an end of each guide region, the press belts are guided over the guide elements to run separately from one another, and a press belt angle between the press belts at the guide elements is greater than approximately 15°.

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 paper machine includes a traveling belt for carrying a fiber web, and a cutting device disposed below the belt for cutting the fiber web into smaller pieces. The cutting device has an inlet and an outlet. A guiding device guides the fiber web from the belt to the inlet of the cutting device. A pulper is connected with the outlet of the cutting device for receiving the smaller pieces of fiber web from the cutting device. The traveling belt may be in the form of, e.g., a wire, felt or water impervious belt. The cutting device may be in the form of, e.g., a shredder, fluffer, water jet cutter, laser cutter and/or roll cutter.

Abstract: A system and method effectively threading the moist tail of a web through a pulp dryer. A tail threading belt in a closed loop passes the tail of the web through the dryer, and the most tail of the web is transferred from a support wire in the press section of a pulp machine to the tail threading belt. Transfer may be effected using a suction roll with a suction sector and a blower sector, or by using a suction chamber having a perforated escort belt which cooperates with it to engage the tail section on the wire and fully support it during transfer to the threading belt. The threading belt may be folded over to contain the tail web inside it while it passes through the dryer.

Abstract: Method and apparatus for guiding a paper or board web in a paper manufacturing machine, a board manufacturing machine, or finishing units in connection with such machines. Web travel is guided by changing the travel position of at least one wire travelling in contact with the web such that the velocity vector of the wire at least at the point of contact of the web and the wire is directed sideways from the travel direction of the web center line when the web is brought onto the wire.

Abstract: Process and device for transferring at least one of a fibrous material web and a strip of the fibrous material web from a moist releasing belt to an accepting belt in a web producing machine that includes a transfer region and a separating region arranged in this order in a web travel direction. The process includes guiding the accepting and releasing belts together at least in the transfer region, separating the accepting belt from the releasing belt in the separating region, and suctioning a surface of the accepting belt opposite a fibrous web and strip carrying surface so that the strip and the fibrous material web are carried by the carrying surface. When the strip is being transferred, the suctioning occurs at least the transfer region, and when an entire width of the fibrous material web is being transferred, the suctioning occurs at least primarily in die separating region.

Abstract: A vacuum belt conveyor is suitable for guiding a running paper web, in particular a threading tail, and includes an air-pervious endless conveyor belt traveling around a vacuum box which supports two belt pulleys. At least one vacuum blower creates a negative pressure within the loop of the belt. The vacuum blower is positioned within the vacuum box at a certain distance from the conveying run of the belt and is driven by an air turbine. One of the pulleys is driven by an electric motor (M′) positioned inside of that pulley.

Abstract: An apparatus for transferring a fast-running, ready-dried fibrous web from a first location to another with minimal undesirable motion is described. The apparatus includes an air foil defining a web support surface which extends substantially continuously from a first processing location to a second processing location, and includes at least two air supply channels extending substantially perpendicular to the direction of web travel across the air foil for providing flows of pressurized air between the foil and the web being, processed in the general direction of web travel. In this way, a layer of reduced static pressure is provided which stabilizes the web against undesirable motion, while the build up of dust is minimized.

Abstract: A device for conveying and guiding a lead-in strip in a paper machine which includes a conveyor formed of an air permeable material, the conveyor having a run with opposed faces on respective sides. The lead-in strip is conveyed on a first face on a first side of the run. The device also includes a foil rib located on a second side of the run of the conveyor. The foil rib includes a foil head for producing a vacuum effect on an outlet side of the foil head in the direction of movement of the run.

Abstract: A machine for producing a material web, in particular a paper or cardboard web, includes a pick-up suction roll disposed between a wire section and a press section and wound around by an air-permeable endless belt. In the vicinity of the pick-up suction roll, the material web is taken from a wire belt by the endless belt in order to then be supplied to a first press of the press section. In this regard, the width of the material web can be adjusted by adjustable size cutting elements provided in the vicinity of the wire belt and the suction width of the pick-up suction roll 14 can be adjusted by adjustable sizing strips associated therewith. An adjustment system is provided for a preferably simultaneous, at least essentially synchronous motor-induced adjustment of the size cutting elements and sizing strips.

Abstract: The invention relates to a method in a paper machine in threading of paper web, in which method a narrower tail (T) is separated from the edge of the paper web and transferred to threading guiding means arranged in connection with the moving parts of a machine conveying the paper web. Before transferring the tail (T) to the threading devices, its free length is shortened, for example by crinkling, wherein its tensile stretch is increased and bending stiffness reduced.

Abstract: A paper machine and web control system for the same to be activated on web rupture, which paper machine has a double-felted press nip and a treatment unit for increasing the dry solids content of the web downstream of the press nip, the web being transferred from the press nip to the treatment unit in an open draw. The web control system has a water-application device arranged at the open draw to discharge jets of water against the upper press felt on rupture of the web so as to prevent an upstream end of the web continuing with the upper press felt, a felt-deflection device situated downstream of the press nip to bring the press felts into contact with each other downstream of the press nip on rupture of the web so as to sandwich the web between the felts, and a suction device in the loop of the lower press felt at a position between the press nip and the felt-deflection device to temporarily attach the web to the lower press felt by suction.

Abstract: Apparatus and process for guiding a running web. The apparatus includes at least two guide rolls, which includes at least one driven roll, a suction box coupled to a vacuum source and having a wall with an aperture, an air-permeable belt tensioned over the at least two rolls, and the suction box being positioned within a loop formed by the belt. The suction box is positioned to suction a portion of the belt that is adapted to guide the running web. The apparatus also includes a vacuum control adapted to control a degree of vacuum in the suction box that includes a movable element positioned adjacent the aperture and an inner surface of the wall. The moving element is adapted to open and close the aperture, and an actuator is coupled to the movable element to effect the opening or closing of the aperture.

Abstract: A paper web threading apparatus is provided for a papermaking machine. The threading apparatus includes a transfer sheave assembly mounted on an end of a middle rotating drum disposed between an upstream drum and a downstream drum. The transfer sheave assembly includes a first sheave that is fixed to the middle drum and rotates with the middle drum and a second sheave that rotates freely and independently of the middle drum. An upstream pair of endless ropes is provided that wrap partially around the sheave of the upstream drum before wrapping partially around one of the sheaves of the transfer sheave assembly. A pair of downstream endless ropes is also provided that wrap partially around the other of the sheaves of the transfer sheave assembly as well as the sheave mounted to the downstream drum. The upstream ropes maintain an adjacent position with respect to each other until they depart from the transfer sheave assembly.

Abstract: In the method for paper web transfer in a paper machine or finishing apparatus for paper, a paper web (W) is transferred in a first machine portion (A) at a first travelling speed. In a second machine portion (B) following the first one in the travel direction of the web, the tail is transferred at a travelling speed lower than the first travelling speed. In the second machine portion (B) the tail (TB) is transferred independently without a draw connection to the web (W, TA) transferred in the first machine portion (A), the travelling speed of the tail (TA) transferred in the second machine portion (B) is increased, and a draw connection is established between the tail and the web (W, TA) transferred in the first machine portion.

Abstract: A method in a paper machine for transferring a paper web from a wet wire in a former section to a pick-up fabric or an equivalent transfer fabric of a press section, including the steps of forming a pick-up point on the wet wire and separating an edge strip from at least one edge of the web prior to the pick-up point by means of at least one cutting device. The method further includes separating the web from the wet wire and passing the web onto the pick-up fabric at the pick-up point. The method also includes applying a pressure difference to the at least one edge strip through the wet wire or the pick-up fabric at or after the pick-up point to cause the at least one edge strip to either follow the wet wire or become separated from the pick-up fabric after the pick-up point and to be placed in a broke system arranged beneath the paper machine.

Abstract: A method of dividing a formed paper web into at least two partial-width webs during production of creped paper in a paper machine having a cylinder with an adhesive coating to which the web adheres. The web is divided in conjunction with the cylinder by one partial-width web being detached by scraping from the outer surface at a first web-detaching point while the other partial-width web, still adhered to the outer surface, accompanies this surface to a second web-detaching point situated downstream, to be detached by scraping from the outer surface, at least one partial-width web being creped off.

Abstract: This invention is directed to a paper-making machine utilizing rotating cylinders, especially dryer cylinders, with a drying felt intertwined about the dryer cylinders to compress the wet paper against the dryer cylinders as the wet paper travels therealong. A threading doctor assembly with a blowpipe air nozzle blowing system is associated with each dryer cylinder. When air is flowing into the blowpipe blowing system, the leading tail of the wet paper is directed from the preceding dryer cylinder to the next. A proximity sensor associated with each threading doctor assembly is in communication with a controller and is positioned to determine if the wet paper is within a detection area. Air valves or solenoids coupled between an air supply system and the blowpipes are also coupled to the controller.

Abstract: An apparatus for moistening a material web, the material web having opposed edges and a marginal region at each edge, the apparatus including a moistening device adapted to cover the marginal regions of the material web, so that only the marginal regions are moistened. Also provided is a method for moistening a material web, the method including covering the marginal regions of the material web with a moistening apparatus, and moistening only the marginal regions of the material web covered by the moistening apparatus.

Abstract: An apparatus is disclosed for assisting in the release of a web from contact with the heated surface. The apparatus includes a material which is urged into contact with the heated surface upstream relative to the contact of the web to the heated surface. The material is devoid of metallic content and the arrangement is such that when the web contacts the heated surface downstream relative to the material, thermal energy is transferred from the surface to the web. The web is released from the heated surface subsequent to the transfer of the heat, such release being facilitated by the material being urged against the surface.

Abstract: A device for drawing a web through an open draw in a paper or board machine with the aid of a leader, said open draw extending between a first web-carrying element and a second web-carrying element, said device comprising a stand structure and a transfer member having the width of the leader. According to the invention the transfer member is arranged to be inserted at and above the first web-carrying element and set in various predetermined positions, the device having setting members for setting the position and direction of the transfer member in relation to the second web-carrying element; a travelling member to carry and move the transfer member; and actuator for operating the travelling member.

Abstract: An apparatus to facilitate tail threading of a paper web and a method of threading the tail of a paper web (1) to be coated through a coating line during startup or web break, in which an edge strip is slit from the web to act as the tail of the web which is first threaded through the line and then widened to the normal width of the web by moving the edge strip slitter. Said edge strip is first guided to a movable support element (12) located after the edge strip slitting point in the travel direction of the web (1) and the strip is supported against said movable support element (12) and is passed supported by said movable support element (12) to the next support element (14).

Abstract: A 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 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 extended-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 directional tail transfer apparatus includes a tray that defines a longitudinal path line extending along the tray overwhich a paper tail to be threaded travels. The longitudinal path line of the tray is positioned adjacent a first section in a papermaking machine where the paper tail exits. The longitudinal path line is aligned with the initial path of movement of the paper tail. The tray has with one or more creases, which extend across the tray width and bisect the longitudinal path line to effect a natural change in direction of the longitudinal path line through the tray. At least one of the creases bisects the longitudinal path line at predetermined angles other than 90 degrees to provide a lateral displacement in the portion of the tray that follows this crease. This one crease allows the paper tail to fold along its width on an angle that is not perpendicular to the natural downstream path of travel of paper tail.

Abstract: In a papermaking machine for forming tissue paper, a turning bar is disposed having a curved surface about which a web of tissue paper is turned. The bar has an internal air plenum which supplies air to two sets of holes or slots. The first set is arranged to direct air normal to the curved surface of the bar or in the machine direction, the second set is arranged to direct air toward the edges of the tissue which is turned around the bar. The second holes or slots produce air jets which apply a cross machine direction tension to the web which prevents wrinkling of the web. The first set of holes or slots forms jets of air that prevent the tissue web from contacting the turning bar.

Abstract: The invention relates to a device and method in a paper machine for guiding a web and in particular in guiding a leader of the web. The device operates in a paper machine in the area between a center roll of the press section and a separate press nip in the press section. The separate press nip is formed between a smooth-faced upper roll and a hollow-faced lower roll. Around this lower roll, a lower felt of the separate press is placed and runs from a suction-transfer roll placed at the proximity of the center roll as a straight run into the separate press nip. At the initial end of the straight run of the felt of the separate press nip, in connection with the guide roll, air-transfer devices are arranged, by whose means a reduced pressure is produced at least across the width of the leader in connection with a closing inlet nip between the felt and the leader and/or in connection with an opening outlet nip defined between the guide roll and the straight run of the felt.

Abstract: A method and device for cutting a paper web (9) in a twin wire former (1) is described, said web being formed between two forming fabrics (4, 5) while wrapping a section of a forming roll (3), and the web cutting being carried out with the aid of jet cutters (10, 11) discharging jets of pressure medium so that a paper web of final width is obtained and, when applicable, a tail in the web. The jet cutters (10, 11) are arranged at the forming roll (3) so that the web cutting is carried out in the web at a point where the recently formed paper web (9) and the forming fabrics (4, 5) together wrap said section of the forming roll (3) in a sandwich structure.

Abstract: An apparatus to facilitate tail threading of a paper web and a method of threading the tail of a paper web (1) to be coated through a coating line during startup or web break, in which an edge strip is slit from the web to act as the tail of the web which is first threaded through the line and then widened to the normal width of the web by moving the edge strip slitter. Said edge strip is first guided to a movable support element (12) located after the edge strip slitting point in the travel direction of the web (1) and the strip is supported against said movable support element (12) and is passed supported by said movable support element (12) to the next support element (14).

Abstract: A novel sheet transfer stabilizer is provided for transferring a fibrous wet sheet from a press section to a dryer section of a paper-making machine by way of a felt, or the like. The sheet transfer stabilizer includes a composite Venturi box which is disposed between a felt roll of the press section and a first dryer. The Venturi box includes three side-by-side Venturis, namely an inlet Venturi, an outlet Venturi, and a main Venturi, such Venturi boxes are used to create and maintain a vacuum in the felt/web system.

Abstract: A papermaking machine uses a low pressure water jet mounted on a pneumatic actuator for movement at least as fast in the cross machine direction as the paper web moves in the machine direction for a distance of 2 to 12 inches. The jet rapidly cuts a tail with a blunt edge of 2 to 12 inches wide from the web. The actuator is mounted on a screw or belt driven carriage to traverse the web and expand the tail after it has been threaded through the dryer section until the tail encompass the entire web and thus completes the threading process. A controller coordinates an air jet positioned beneath a doctor blade and a vacuum suction roll which engages the last press roll. The air jet and vacuum suction roll are actuated when the blunt end of the tail engages the doctor blade. In this way a tail with little or no streamer is formed and blown onto a dryer fabric supported on a vacuum suction roll which leads the tail into a single tier dryer section.

Abstract: To accomplish a web transfer, which in reliability is comparable to the one obtained with a closed draw, in any operating environment, but especially where it is desirable to transfer a fast running tissue web (4) from the drying section of a tissue machine, e.g., a Yankee dryer (2), to a reel-up (3), a web support device (10) extends across the width of the web (4) and along a predetermined run of the web (4) from the Yankee dryer (2) to the reel-up (3). The web support device has a support surface (11) formed by a series of plate member assemblies (23) having means for creating a flow of air in the direction of the web run. Between the web (4) and the support surface (11) the flow of air forms an air layer (15) of reduced static pressure, so as to stabilize the web (4) against flutter. The predetermined run may extend through a calender (7) and past scanner equipment (8). Pneumatic tail threading capabilities may be included.

Abstract: A method and device for stabilizing the running of a paper web in a paper machine in connection with a paper guide roll, in particular between a press section and a dryer section. In the method, the paper web is passed over the paper guide roll onto a drying wire or equivalent and negative pressure (suction) in the opening nip of the paper guide roll is lowered until a transition is made to the side of positive pressure in order to press the paper web against the drying wire or equivalent. The device includes a nozzle beam and an air chamber which communicates with a blow air duct. The nozzle beam is placed at the side of the opening nip of the paper guide roll such that the blowing discharged out of a nozzle opening of the nozzle beam is directed at the opening nip in order to press the paper web against the drying wire or equivalent.

Abstract: A method and apparatus for cutting a paper web (W) in a group of drying cylinders provided with single-wire draw (13) in a paper machine or a finishing machine. The drying wire (13) is separated from the paper web (W) by one or more guide rolls (14a, 14b) thereby creating a open draw (W.sub.0) for the web (W). The cutting of the paper web (W) is carried out at the open draw (W.sub.0) of the web (W). After the open draw (W.sub.0), the drying wire (13) and the web (W) are rejoined on the surface of the following leading or drying cylinder (11). Preferably, two guide rolls (14a, 14b) are utilized whereby the first roll is disposed so that the drying wire (13) supports the web (W) up to the location of the guide roll (14a), which is followed by an open draw (W.sub.0) of the web. The drying wire (13) is returned onto the following leading or drying cylinder (11) with the second guide roll (14b).

Abstract: Process an device for guiding a material web. The invention pertains to a method and apparatus for guiding a material web or strip thereof toward and around a movable guide element, in a simple and safe manner, which is achieved in that, for example, in the press portion of a papermaking machine, a strip of a paper web is brought into the vicinity of a rotating guide roller and, there, an air jet extending nearly tangentially, relative to the rotatable guide roller of a blast nozzle, serves for the transport to a subsequent unit.

Abstract: A clipped tail, which is the severed lead end of a paper web tail formed on a papermaking machine, is produced in the tail supported on a roll by combining the operation of a water jet, which projects a high pressure stream of water and is moved laterally to sever the tail transversely to its direction of travel, with the operation of a doctor having a blade, which moves with the water jet and which lifts and deflects the tail clip and following tail from the roll. An air stream is used to guide the tail downstream of the doctor blade. Both the water jet and doctors are mounted on a traversing apparatus to move transversely together across the traveling tail to automatically produce the tail clip and direct it to thread the downstream portion of the papermaking machine.

Abstract: A closed press section in a paper machine including a compact combination of press rolls, some of which define press nips with each other between which the web has a closed draw supported by the face of a fabric. The press section has a center roll in connection with which at least one press nip is formed. A closed loop of a transfer band is passed around the center roll. The web is transferred on an outer face of the transfer band after the last press nip in the compact combination of rolls as a closed and constantly supported draw onto a drying wire in a drying section following after the press section. The transfer band loop is preferably made of a fabric that substantially does not receive water and does not rewet the web. The web-adhesion properties of the outer face of the transfer band are chosen so that, after the last nip, the web follows the transfer band, and so that the web can be transferred as a fully closed draw onto the drying wire.

Abstract: The invention relates to a method and apparatus for cutting the edge of a fibre web (4) in a paper machine. In the method, water nozzles (13a, 13b) are Conducted in a transverse direction with respect to the edge of the fibre web (4) so that the place where the cut comes against the surface of the yankee cylinder of the drying unit varies. The apparatus comprises water nozzles (13a, 13b) used for cutting, pipes (14a, 14b), a base (16), and a pneumatic cylinder (17) by which the water nozzles (13a, 13b) are deflected both in a longitudinal and transverse direction with respect to the fibre web (4).

Abstract: A method for causing adherence of a web to a drying wire so as to prevent the effects of centrifugal forces and of other air-flow phenomena, which effects attempt to separate the web from the drying wire in dryer groups having a single-wire draw and arranged in a multi-cylinder dryer of a paper machine. The dryer groups include heated drying cylinders, a drying wire for pressing the web against outer cylinder faces of the drying cylinders, and guide cylinders or rolls on which the web runs on the outside face of the drying wire. The guide cylinders have perforations which pass through the cylinder mantle and open into an inside space in the interior of the guide cylinders which is subjected to a vacuum. The vacuum in the guide cylinders is transferred to the outside face through the perforations. The guide cylinders have shafts on which the guide cylinders are mounted revolving.

Abstract: Apparatus is disclosed to control Yankee hood profile along the cylinder surface so as to provide a structurally stable hood having controlled impingement distances at operating temperatures. Radial support of the hot hood internals are located at or near the extremities of the hood wrap and the internal profile along the cylinder wrap is on an adjusted cold shape so that the profile is even when operating temperatures are reached. Thus, the hood is "deformed" (not pre-strained) when cold but, when the operating temperature is reached, it assumes the desired configuration.

Abstract: The invention relates to a device in a paper machine for guiding a web and in particular in guiding a leader of the web. The device operates in a paper machine in the area between a center roll of the press section and a separate press nip in the press section. The separate press nip is formed between a smooth-faced upper roll and a hollow-faced lower roll. Around this lower roll, a lower felt of the separate press is placed and runs from a suction-transfer roll placed at the proximity of the center roll as a straight run into the separate press nip. At the initial end of the straight run of the felt of the separate press nip, in connection with the guide roll, air-transfer devices are arranged, by whose means a reduced pressure is produced at least across the width of the leader in connection with a closing inlet nip between the felt and the leader and/or in connection with an opening outlet nip defined between the guide roll and the straight run of the felt.

Abstract: A vacuum/blowing sheave on the end of the lower calender roll of a papermaking machine threads a tissue web tail from a Yankee dryer to a take-up reel through the calender. The sheave is positioned adjacent to the outlet of the threader tube from the Yankee dryer, where the vacuum portion of the sheave picks up the tail and transports it towards the take-up reel. Upon transiting the closed nip of the calender, the tail is blown by a short blowing section on the sheave into the tube threader which leads to the take-up reel.

Abstract: A dryer section in a paper machine for drying a paper web, having normal dryer groups with a single-wire draw in which drying cylinders are arranged in an upper row and reversing cylinders in a lower row. The dryer section has at least one inverted dryer groups in which drying cylinders are arranged in a lower row and reversing cylinders are arranged in an upper row. In view of making the dryer section more compact, intensifying the evaporation, reducing the transverse shrinkage of the web, and/or improving the runnability of the web, the drying cylinder and/or the reversing cylinder or roll placed in connection with the transfer over the gap between the groups is/are placed so that its/their height position is displaced as compared with the other cylinders in the same group. In an inverted group, an upper reversing cylinder is arranged in connection with blower devices for drying air for the web.

Abstract: A compact rope stretcher maintains the tension in an endless rope used for threading a web in a papermaking machine and includes a beam having a flange forming a track which is engaged by guide wheels supporting a pair of separate carriages. The carriages support corresponding rope sheaves for free rotation, and a pair of fluid cylinders are mounted on the beam and enclose pistons connected by corresponding piston rods directly to the corresponding carriages. The beam may be mounted on the papermaking machine with its track-forming flange extending at an angle to the horizontal so that the respective piston rods extend upwardly and downwardly from the cylinders. Pressurized fluid is supplied to the upper end of the one cylinder having the downwardly extending piston rod, and the upper end of the other cylinder is vented to atmosphere. The lower ends of the two cylinders are interconnected by a fluid passage to form a closed circuit which is filled with hydraulic fluid.

Abstract: A pick-up roll apparatus is disclosed for picking up a tail of a web from a forming wire and for transferring the tail to a press felt wrapping around a portion of the apparatus. The apparatus includes a perforate rotatable shell which is disposed adjacent to the forming wire, the shell having a first and a second end. A stationary core is disposed within the shell, the core defining a tail box which is bounded by the shell. The tail box is disposed adjacent to one of the ends of the shell and is selectively connected to a source of partial vacuum such that when the tail of the web is cut on the forming wire, the tail is drawn from the forming wire onto the press felt which wraps around the rotatable shell. The core also defines a downstream chamber which extends between the first end and the second end of the shell.

Abstract: The dry end of a paper making machine includes a first dryer group of heatable web dryer cylinders followed by a second dryer group of heatable dryer cylinders. Each dryer cylinder has a neighboring suction guide roll. Respective first and second web support belts are provided for the first and second dryer groups. The paper web to be dried alternately passes between a dryer cylinder and the neighboring suction guide roll, such that the web comes into direct contact with the dryer cylinders. A transfer region is located between the two dryer groups at which the web is transferred from the first to the second web support belt. A displaceable guide roll in the transfer region is associated with at least one of the first and the second web support belts.

Abstract: A fabric for use in supporting a cellulose pulp sheet during passage through a Flakt dryer which is of asymmetric double weave construction, the fabric being folded into V-shaped configuration and there being essentially uncrimped, essentially inextensible load bearing yarns positioned between the weft yarns of the respective fabric layers and extending in the longitudinal direction of the fabric, adjacent ones of the load bearing yarns being separated by warp yarns of the less densely woven inner layer which weave also with the weft yarns of the outer layer. The more densely woven outer layer protects the load bearing yarns from wear and from the adverse effects of heat.

Abstract: In a web pick-up device and a method of using the pick-up device in the press section of a paper machine, the running web makes contact, in a press gap, with a smooth rotating surface from which the web runs off at a point of pickup (A). The rotating surface and a suction box form together, in the area of the pickup point (A), a gap through which runs a porous conveyer belt which receives the fibrous web. The suction box is pivotably mounted and has in the area of the point of pickup (A) a sliding surface across which slides the conveyer belt, and which during operation is arranged at an adjustable spacing from the smooth surface. The spacing is determined by a stop on which bears the suction box during operation, under the effect of a flexible lift device.

Abstract: Apparatus and methods of the invention create a movable paper machine threading tail that can be shifted away from the front ends of downstream rolls, thereafter to be widened symmetrically from a central position of the machine. Embodiments of the improvement comprise two independently traversable cutting assemblies mounted on one or more transverse service beams. Each cutting assembly comprises a traversing carriage upon which is mounted an appropriate web cutting device. Carriage positioning and cut activation are controlled in a way that one of said tools replaces the machine's somewhat permanently positioned front deckle squirt in defining the front most edge of a threading tail. Apparatus of the improvement also provide the means of creating and removing a sample from a main web without interrupting the path of the web through the machine thereby avoiding the need to re-thread following sampling procedures.