Abstract: A transfer system for transferring a moving wet cellulosic web between two moving elements of a paper machine without excessive sheet flutter or breakage, supports the web and permits higher web speeds than presently used. The transfer system comprises a suction roll that forms a nip in contact with the web on the surface of a roll or web supporting belt, a doctor blade positioned in contact with the surface of the roll or web supporting belt immediately after the nip to ensure the web separates from the surface, and an air jet adjacent the doctor blade that blows air in a direction substantially opposite the moving web, between the moving web and the surface of the roll or web supporting belt, to guide and support the web towards the suction roll.

Abstract: The dry end of a paper making machine includes a twin wire dryer group following a single wire dryer group. The paper web is continuously guided by a support belt which moves alternately between dryer cylinders and intermediate deflecting rolls in the single wire dryer group. In the twin wire dryer group, the web travels over open lengths between dryer cylinders in the two rows of the second group. A rope guide threads the web into the twin wire dryer group. The start of the rope guide, called the rope shears, is in the vicinity of the periphery of the last or next to last deflecting roll called the selected deflecting roll in the single wire dryer group. Between the selected deflecting roll at the start of the rope shears and the preceding selected dryer cylinder, there is a relatively long straight path of travel for the support belt. Parallel to that path, there is a scraper and a guide plate which deflects the edge strip of the web laterally into the rope shears which is laterally to the side of the web.

Abstract: A method and an 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 an open draw (W.sub.o) of the web (W). The cutting of the paper web (W) is carried out at the open draw (W.sub.o) of the web (W). After the open draw (W.sub.o), 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.o) of the web. The drying wire (13) is returned onto the following leading or drying cylinder (11) with the second guide roll (14b).

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.

Abstract: An apparatus includes a forming section for forming a web from stock. The apparatus also includes a press section which is disposed downstream relative to the forming section for removing a portion of water from the formed web. The press section includes a suction pick-up roll disposed downstream relative to the forming section for picking up the formed web from the forming section. A press felt extends around the suction pick-up roll such that in use of the apparatus, the formed web is picked up from the forming section and is supported by the press felt. An extended nip press is disposed downstream relative to the pick-up means. The press includes a rotatable backing roll and a pressing shoe which cooperates with the backing roll for defining therebetween an elongate pressing section. A bearing blanket movably extends through the pressing section with the blanket cooperating with the suction pick-up roll such that the formed web is transferred from the press felt to the blanket.

Abstract: In a papermachine coating or size press section a rope system is provided for feeding the web through the machine either initially or after a break. In an abrasive environment continuously running ropes can lead to excessive wear on the ropes. In the present invention a rope system for a papermachine has means independent of a papermachine for driving the ropes which may be stationary when not in use. The driving capacity of the rope system is such that during simultaneous operation of both the rope system and the coating or size press section, the rope system can operate at speeds greater than the section.

Abstract: An apparatus is disclosed for transferring a threading tail of a web from a press section to a dryer section of a papermaking machine. The apparatus includes a press roll for releasably supporting the web and a doctor blade which cooperates with the press roll. A tail cutting device is disposed upstream relative to the blade for cutting the tail from the web. A lead-in roll is disposed adjacent to the press roll. The lead-in roll includes a suction tail box which cooperates with the tail. A device moves the lead-in roll from a first to a second location with the first location being in close proximity to the press roll such that when the tail box is connected to a source of vacuum, the tail is drawn away from the press roll onto a dryer felt extending around the lead-in roll. The second location is spaced from the press roll such that an open draw is established between the press roll and the lead-in roll.

Abstract: A method and apparatus in a drying section of a paper making machine wherein a so-called single-wire draw is applied and wherein blow boxes (20) are used, which are intended to prevent phenomena that disturb the mutual support contact between the web (W) and the drying wire (12). The blow boxes (20) extend across the entire width of the web (W), and they communicate with members (17, 18, 21, 22) that supply blow air, and they are provided with at least two nozzle slots (13, 14) transverse to the running and longitudinal direction of the web (W) as well as with a carrier face (16) between said nozzle slots. Negative pressure is produced in the space (A-) defined by the carrier face (16) and the drying wire (12) by means of the ejection and prevention effects of the air jets (F.sub.1, F.sub.2) blown through the nozzle slots (13,14). In order to speed the threading of the web (W), in the blow boxes (20) the blow sections (24.sub.k+1. . . 24.sub.

Abstract: A felt turning roll for use in the dryer section of a papermaking machine has a stationary shaft extending outwardly from at least one end of a perforated roll shell. The stationary shaft extends inwardly from the end of the roll for only a short distance which is substantially less than half the length of the face width of the roll. The stationary shaft is bored to permit a source of sub-atmospheric air pressure to be applied to its exterior portion. The inner portion of the shaft has a valve, a seal near its inner end between it and the roll shell, and openings to permit the exposure of sub-atmospheric air pressure within the roll shell on either side of the seal. The use of short stationary shafts eliminates the center shaft which otherwise would extend for the length of the roll.

Abstract: The invention relates to a method and an apparatus for cutting off and guiding a strip cut from the edge of a paper web in a threading operation. The strip is released from a cylinder by blowing and is guided by pocket blowing so as to form a bag and is then cut off. The strip is conducted through an arrangement functioning as a draw-press, which pulls the strip against a cutting member of a cutting device in such a way that it is severed and the strip can immediately be transferred further.

Abstract: A reel threader for treading the tail of a paper making web around a partial reel. A flexible panel with interior passages forming an air distribution network has openings on one surface to provide a plurality of air streams out of the surface. The panel is positioned by a computer controlled movable support frame in an arc which is spaced from and concentric with the lower and side portion of a partial reel, regardless of its diameter, to form a gap. The tail passes from the nip into the gap and is pulled through the gap by the rotating periphery of the partial reel.

Abstract: Apparatus for stabilizing the trailing end of a web that is to be spliced to the leading end of a new web includes a knife for severing the old web and for creating a tail that must be stabilized, a suction box over which the trailing end passes, which provides stability to the trailing end, a pressure roll movable to move the cut trailing end of the old web against the leading end of the new web and a leaf-spring-like extension extending downstream of the suction box to the connection point or splice point between the webs. The extension is deflectable with the pressure roll and the extension carries the vacuum of the suction box further downstream and also supports the trailing end of the cut old web. The extension is cantilevered to the downstream side of the suction box.

Abstract: A paper tailing device accommodates automatic transfer of an initial portion of a paper web across a gap in a paper making machine during guiding of the initial portion through the machine. The paper tailing device comprises a pair of brackets, one on each side of the gap and each carrying a pair of sheaves over which carrier ropes extend. During guiding of the initial portion of the web through the machine, a side edge of the web is gripped between the carrier ropes, and at the sheaves, the ropes define an outgoing nip on one side of the gap and an incoming nip on the opposite side. To transfer the leading end of the web across the gap, the brackets are moved close together in the gap to place the nips in close facing relationship, so that as the leading end of the web exits the outgoing nip it is automatically introduced into the incoming nip.

Abstract: A method and a device for cutting an edge strip in a web by means of a water jet against a felt or wire of a paper machine for the threading of the web, whereby the end of the web is passed through the paper machine by means of the edge strip cut in the web, the edge strip being narrower than the web. In order to prevent the felt or wire from getting wet or being choked, the water jet is displaced back and forth across the direction of travel of the web so that the water jet cuts a gently wavelike edge in the edge strip. Correspondingly, the water used in the cutting and the filling agent or other such waste possibly separated from the web spread over the web over a wider area instead of spreading linearly, whereby the felt or wire will not get wet or choked.

Abstract: Method and apparatus for guiding and directing an end conduction strip of a web from a smooth-surfaced roll, such as a paper web in a press. The end conduction strip is detached from the smooth surface of the roll and further guided by utilizing a guide plate and air blowing actions. An air jet having sufficiently great impulse is directed against the end conduction strip on the roll surface. The end conduction strip is cut with the aid of this air jet and a leading edge thereof is detached by this air jet from the roll surface. The detached end conduction strip is further guided and conveyed forwardly by a transfer blowing action. This transfer blowing action is directed along the guide plate. An under-pressure field is produced in conjunction with the guide plate, by effect of the blowing action. The effect of this under-pressure field causes the end conduction strip to be further guided in a direction determined by the guide plate.

Abstract: A tail cutter apparatus is disclosed for cutting a tail from a web extending through a single tier dryer section. The apparatus includes a dryer of the drying section and a felt extending contiguously with the web around the dryer, the web being disposed between the felt and the dryer for drying the web. The further dryer is disposed downstream relative to the dryer and the felt and web extend contiguously around the further dryer with the web being disposed between the felt and the further dryer for further drying the web. A felt roll is disposed downstream relative to the dryer and upstream relative to the further dryer for guiding the felt during movement of the felt between the dryer and the further dryer. A guide roll is disposed downstream relative to the dryer and upstream relative to the further dryer for guiding the web during movement of the web away from the towards the felt roll such that a first and second open draw of the web are defined between the felt roll and the guide roll.

Abstract: A method and apparatus for automatically threading a traveling web strip, such as a so-called paper tail in a papermaking machine, utilizes a doctor for doctoring the web strip from the surface of a roll. A stream of compressed air is projected against the oncoming web strip in the vicinity of the point where the doctor blade contacts the web on the roll and urges the oncoming web off the roll surface upstream of the doctor. A foil is brought into proximity with the outer surface of the web spaced over the roll to urge the strip outwardly and against a serrated knife to sever the web strip against the force of its momentum. The severed end of the web strip is then guided onto a plate for conveyance into a downstream section of the machine for further processing.

Abstract: A press apparatus is disclosed for pressing water from a web which extends from a forming section to the press apparatus and subsequently from the press apparatus to a drying section. The apparatus includes a pick-up roll which is disposed closely adjacent to the forming section for picking up the formed web from the forming section. A downstream roll couple defines therebetween a first nip for pressing a first portion of water from the formed web. A transfer felt cooperates with the pick-up roll and the first roll couple for transferring the web from the pick-up roll to the first nip. A press roll is disposed downstream relative to the first nip and a first backing roll cooperates with the press roll for defining therebetween a second nip. A second backing roll is disposed downstream relative to the second nip with the second backing roll cooperating with the press roll for defining therebetween a third nip.

Abstract: The invention relates to a device for cutting off and guiding an edge strip from one part of a paper or board machine to another in connection with the threading of a paper or board web. The device includes air jet nozzles for guiding the edge strip, and a threading plate which is provided with a cutting mechanism for cutting off the edge strip. In order to provide a device reliable in operation, the cutting mechanism including at least one blade member which is arranged to be displaced during the cutting of the edge strip in a plane substantially parallel to the plane of the threading plate from the front side of the threading plate towards the front edge thereof and to cut off the edge strip on the side facing away from the front edge of the threading plate and to guide the edge strip further on to the threading plate.

Abstract: A coater and a method of operating such coater is disclosed. The method of operating the coater includes the steps of separating a first tail from a full width web unwound from an unwind stand at threading velocity and threading the first tail at the threading velocity through a pull stack. The first tail is widened to the full width of the web so that a full width web extends through the pull stack. The full width web emerging from the pull stack is dumped into a first broke chute which is disposed below the pull stack. The full width web extending through the pull stack is accelerated along with a coating apparatus to coating velocity so that both the full width web and the coating apparatus attain coating velocity. A second tail is cut in the full width web between the unwind stand and the pull stack and such second tail is threaded through the coating apparatus while the second tail is moving at coating velocity.

Abstract: Apparatus for entraining and directing a wet paper web in a paper making process comprises a wall or plate defining an airfoil section and planar directing section. A curved wall wrapped around the airfoil section defining there between a narrow channel terminating in a mouth of a slot forms an air passage for direction of air over the airfoil section toward the directing section to form a force under the Coanda effect. Three jet nozzles are arranged respectively at ends of the slot and centrally of the slot for directing the web from a roller toward the Coanda effect. The curved surface terminates at a position forwardly of the center line of the airfoil section so as to reduce the angle through which the air turns in the Coanda effect and thus develop a gentle force. The slot is wider at the center than at the sides to develop a greater force at the center.

Abstract: Apparatus for conveying a web lead-in strip in a paper machine in a controlled manner includes a conveyor belt arranged in a loop around one or more reversing rolls, the conveyor belt being formed of an air-pervious fabric. Devices are arranged within the loop of the conveyor belt for creating a dynamic vacuum on the belt run on which the lead-in strip is conveyed to cause the lead-in strip to adhere to that belt run. The devices comprise guide plates associated with respective air distributing headers which direct air jets over the guide plates. The guide plates are arranged substantially parallel to the plane of the conveying run of the belt in a manner such that a dynamic vacuum is created which acts on the conveying run to cause the lead-in strip of the web to adhere to the conveying run of the conveyor belt. The apparatus is lightweight and compact in construction and permits the lead-in procedure to be automated to such an extent that no manual operations are required.

Abstract: An improvement in apparatus for guiding a web leader from a press section to a drying section of a paper machine, the apparatus including flexible guide ropes forming a gap into which the leader is shifted, an initial air blow device for guiding the leader towards the drying wire of the drying section, a first blow member for detaching the leader from the drying wire and a second blow member for applying transversely directed air jets onto the leader to shift it into the gap formed by the guide ropes. According to the improvement, the second air blow device includes a blow member which is mounted for pivotal movement between a non-operating lateral position outside of the edge of the drying wire and an operative position in opposed relationship thereto.

Abstract: A paper machine where the press section features exclusively double felt roll presses (13-16; 23-26) through which proceeds the paper web (10) to be dehydrated between two felt belts (15,16; 25, 26). The paper web (10) is constantly supported by a backing belt (34) at least in the first drying group of the drying section. The transition of the paper web (10) from one roll press to the next and from the press section to the drying occurs without an open draw. The first drying cylinder (31) is located outside the backing belt loop (34), with the paper web (10) proceeding across the upper cyliner area of this drying cylinder (31). The entrance point of a rope carrier (45,46) (serving to thread the paper web into the drying section) is located behind the leaving point of the paper web (10) from the first drying cylinder (31).

Abstract: A method and apparatus for cutting a lead-in strip from a paper web in a multiple cylinder dryer section of a paper machine and for increasing the width of the lead-in strip by a so-called oblique draw. A cutting device for cutting the web is situated alongside a region of an unsupported draw of the web in the dryer section. According to the method, and apparatus a guide surface which extends in substantially parallel relationship to the plane of the web is associated with the web cutting device. A gas flow is directed over the guide surface to stabilize the run of the web during the cutting operation performed on the web by the cutting device. The gas flow is directed onto the guide surface from a nozzle opening situated adjacent to the leading edge region of the guide surface into a space between the guide surface and the web to produce an underpressure in the space which stabilizes the web run.

Abstract: A method and apparatus for cutting a lead-in strip from a paper web in a multiple cylinder dryer section of a paper machine and for increasing the width of the lead-in strip by a so-called oblique draw. A cutting device for cutting the web is situated alongside a region of an unsupported draw of the web in the dryer section. According to the method and apparatus, a guide surface which extends in substantially parallel relationship to the plane of the web is associated with the web cutting device. A gas flow is directed over the guide surface to stabilize the run of the web during the cutting operation performed on the web by the cutting device. The gas flow is directed onto the guide surface from a nozzle opening situated adjacent to the leading edge region of the guide surface into a space between the guide surface and the web to produce an underpressure in the space which stabilizes the web run.

Abstract: In a method for guiding the leader of the web in the drying section of a paper machine, a narrow leader is cut out of the full-width web by water jets, or the equivalent, such as, for example, against a roller of the press section. The leader is guided by a plurality of air jets into a gap between threading ropes and is carried between the threading ropes over drying cylinders. The leader is detached from a rock roller of the press section by a first plurality of air jets and is guided by a second plurality of air jets into connection with a drying wire in the drying section of the paper machine. A third plurality of air jets are directed through the drying wire to the leader supported on the drying wire and detach the leader from the drying wire. Substantially immediately upon detachment of the leader from the drying wire, transverse air jets are directed at the leader and shift the leader into the gap between the threading ropes and move the leader between the threading ropes over the drying cylinders.

Abstract: Apparatus for cutting and guiding the marginal or lead-in strip formed in a paper web and used in connection with a lead-in operation thereof includes first and second guide plates extending at an angle relative to each other and with which are associated nozzle tubes in which nozzle apertures or the like are formed for directing air jets parallel to the first and second guide plates. The first guide plate is oriented so as to correspond to the direction in which the end of the paper web is to be conducted onwardly after severance of at least the forward portion of the lead-in strip. The second guide plate is oriented in a direction which corresponds to that in which the marginal or lead-strip is conducted into a pulper or the like. Air jets are directed from the nozzle apertures over the respective guide plates so that the latter act as guiding and air transport surfaces so that the marginal lead-in strip is pulled in different directions in the area of the guide plates until it is severed.

Abstract: A threading system for threading a lead end of a web along a processing path in a papermaking machine includes an endless looped belt having a fabric base and a soft elastomeric outer surface with a transversely extending gripping slot in the surface. The slot has a round at the base and the sides of the slot are pinched together when the carrier belt extends along a straightline and with the sides separating when the carrier belt is wrapped over a roll so that the lead end of a web can be gripped in the slot for threading a web and automatically released when the sides of the slot are separated as the belt is wrapped over a roll.

Abstract: A continuously advancing tissue paper web is separated from a Yankee dryer roll and creper, and then received and transported on an endless fabric conveyor and embossing belt travelling toward and over a reel drum. At the reeling station the web is threaded onto a reel spool and wound into a parent roll pressing against the conveyor and embossing belt running over the reel drum and thereby embossing the web in the roll/drum nip. Means are provided for automatically air threading the web onto the reel spool. For higher bulk tissue creped sheet, additional dry embossing may be effected while the sheet is being transported by the conveyor belt.

Abstract: A structure for bringing about transfer of a paper web from the press section to the drying section of a paper machine during travel of an initial portion of a web from the press section to the drying section as well as subsequently when the travel of the web between these sections has become stabilized. A pair of rolls are situated between the last roll of the press section and the first roll of the drying section to support and guide the web during travel thereof between the press section and drying section. In addition, a weighting roll is provided to cooperate with that one of the above pair of rolls which is nearer to the drying section to define with the latter roll a nip through which an initial portion of the web travels until the operating conditions have become stabilized.