Abstract: A shoe press for a paper or board machine, comprising a press shoe, a counter roll and a circulated flexible belt. A plurality of hydraulic loading cylinders for pressing the press shoe against the counter roll are arranged between a horizontal frame beam and the press shoe. The pistons of the loading cylinders are connected to the horizontal beam. The shoe press may have first hydrostatic compartments in the surface of the press shoe facing the counter roll and second hydrostatic compartments arranged between the side of the press shoe facing the loading cylinders and the loading cylinders. For supplying the working chambers of the loading cylinders and/or the first and/or second hydrostatic compartments with hydraulic fluid, there is arranged a duct which extends in the longitudinal direction of the press shoe and is common to all working chambers and the first and second hydrostatic compartments, respectively.

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: A method of supporting a press shoe in a shoe press for a paper or board machine, said press shoe forming together with a counter roll an extended nip for a paper or cardboard web and for a flexible circulated belt. On the outside of the loading cylinder of the press shoe there is arranged a compartment, to which hydraulic fluid is supplied in such a manner that the hydraulic fluid in the compartment directly or indirectly exerts a force upon the press shoe in the direction opposite to that of the force exerted upon the press shoe by the loading cylinder. The cylinder part of the loading cylinder is movably arranged on the piston part. Said forces are dimensioned such that in operation they create a gap between the press shoe and the loading cylinder, or between the supporting beam of the press shoe and the loading cylinder, thereby allowing hydraulic fluid to flow out of the compartment.

Abstract: A through-air drying apparatus for drying a traveling wet paper web supported on a continuous fabric comprises a dryer roll about which the fabric and web are partially wrapped and which has a foraminous roll face, a supply hood which surrounds the portion of the roll about which the fabric and web are wrapped and which supplies heated air through the fabric and web and through the roll face into the interior of the roll, and an exhaust system for exhausting air from the roll. An axial exhaust passage is formed through at least one head of the roll. An exhaust manifold is connected to the exhaust passage and defines two outlets on opposite sides of the manifold. A pair of movable ducts are sealingly and releasably engaged with the outlets in the opposite sides of the manifold, the ducts being spaced apart on opposite sides of the roll so that an access space is defined between the two ducts for access to the roll and supply hood.

Abstract: A device in a measuring station in a paper or cardboard machine for manufacturing a paper or cardboard web, said measuring station being situated between two work stations and comprising a scanner with two measuring heads travelling to and fro across the web and between them defining a space through which the web passes, driven by drive members. According to the invention the device comprises a continuous, flexible support strip extending through said space between the measuring heads, transverse and parallel to the web from one edge to the other, and drive members for winding and unwinding the support strip onto or off rolls arranged at points outside each edge of the web, for displacement of the support strip transversely to the web in the same direction and at the same speed as the measuring heads.

Abstract: A reel-up in a paper machine in which the web is reeled onto reeling drums provided with cores, the reel-up having an upper pair of parallel rails extending from the downstream end of the reel-up to its upstream end to support a stock of reeling drums provided with cores, and a handling station for handling finished reels of paper, reeling drums and cores, the handling station having a vertically movable lifting table for receipt of a finished reel of paper, a device for moving a reeling drum out from a reel of paper on the lifting table and for subsequently inserting the reeling drum into at least one core on the lifting table, and a device for feeding cores out onto the lifting table. According to the invention the handling station is provided with a lifting device comprising two lifting elements arranged to be brought into engagement with a reeling drum provided with core(s) and situated on the lifting table, and to lift this and deliver it to the upper pair of rails.

Abstract: A reel-up in which paper is reeled up on reeling drums to form paper reels is provided. The reel-up comprises two stand members provided with stand rails to support the reeling drum. A secondary system consisting of first and second secondary units for receipt of new reeling drums is provided adjacent to the stand members. Each secondary unit comprises a first and a second secondary member, each arranged adjacent one of the stand members. Both secondary members of each secondary unit are arranged at the outer sides of the stand members so that the deleterious effects of paper dust, etc. between the stand members are eliminated.

Abstract: A device is provided in a reel-up in a paper machine in which paper is produced in a web running in the reel-up and supported by a surface winding drum and wound onto exchangeable reeling drums in contact with the surface winding drum in order to form reels of paper. The device applies an adhesive agent on the web when changing full-width reels and in the event of web ruptures in the reel-up. A screen is mounted on the stand of the reel-up, upstream of the surface winding drum, and extending transversely to the machine direction. A spray rack, supported by the screen, extends transversely to the web across its entire width and comprises a plurality of nozzles distributed uniformly across the web to spread spray jets of liquid containing said adhesive agent onto the web to form a coherent adhesive area perpendicular to the machine direction. The adhesive area is brought into contact with an empty reeling drum or an already commenced reel of paper.

Abstract: A paper machine for manufacturing a web of soft crepe paper comprises a wet end (1) having at least one forming wire (4) for forming and supporting a web (7), and a drying section (2) with a through drying machine (13), a drying cylinder (17) and a perforated belt (19) running around a through-blow cylinder of the through drying machine and a transfer roll (21) at the drying cylinder, the web running through the through drying machine being exposed to drying air after its transfer from the forming wire. The belt (19) and the web (7) move from the through drying machine (13) to the drying cylinder (17) in a run that is free from mechanical means which would compress the web, whereby in said run the surface of the web which is exposed to the drying air faces away from the belt and remains free from contact with such means up to the drying cylinder.

Abstract: A shoe press for paper or board machines comprises a press shoe; a counter roll; the press shoe and the counter roll forming between themselves an extended nip for a paper or cardboard web and a circulated flexible belt; and at least one hydraulic loading cylinder for pressing the press shoe against the counter roll. Hydrostatic pockets are arranged in the side of the press shoe facing the counter roll and hydrostatic compartments are formed between the opposite side of the press shoe and the loading cylinders, the pockets and compartment being adapted to be supplied with hydraulic fluid. At least one pipe for supplying hydraulic fluid to the compartments and/or pockets is releasably attached to one side of the press shoe in the longitudinal direction thereof, and the pipe has through holes in its wall, which holes each communicate with a duct at one end thereof, the ducts being formed in the press shoe.

Abstract: Apparatus and method for winding paper onto a parent roll includes a rotatable reel spool onto which the paper web is wound and a reel drum over which the paper web is guided and which contacts the parent roll to form a nip at which the paper is wound onto the parent roll. In one embodiment, sensors are used for determining the indented thickness of the parent roll at the nip and the unindented thicknesses of the parent roll spaced from the nip, from which a radial indentation is derived. A control relatively positions the reel spool and reel drum to maintain the radial indentation within predetermined limits. In another embodiment of the invention, control of linear nip load is accomplished by measuring a diameter of the paper roll and a force indicative of linear nip load, and controlling relative positioning of the reel spool and reel drum to maintain the force within predetermined limits that are based on the diameter of the roll.

Abstract: An arrangement for feeding stock to a headbox in a papermaking machine which comprises at least one stock header with an inlet for receiving stock into the header and a plurality of stock header outlets permitting stock to leave the header. For each stock header outlet there is a stock conduit downstream of the stock header outlet permitting stock to pass from the stock header outlet, through the conduit to the inlet of the headbox. The arrangement includes a dilution header for feeding a diluent such as water to a plurality of stock conduits. The dilution header has an inlet for receiving a diluent not the dilution header and a plurality of outlets permitting the diluent to leave the dilution header. For each dilution header outlet, there is a diluent conduit permitting the passage of a diluent from the dilution header into a stock conduit.

Abstract: A shoe press for a paper or board machine comprises a press shoe and a counter roll forming an extended nip for a paper or cardboard web and for a circulated flexible belt. At least one hydraulic loading cylinder is arranged between a horizontal supporting beam included in the frame system of the shoe press and the counter roll for pressing the press shoe against the counter roll, the piston of the loading cylinder being fixed to the supporting beam. A hydrostatic compartment is arranged between the surface of the press shoe facing the loading cylinder and the opposing surface of the loading cylinder and adapted to be supplied with hydraulic fluid from a hydraulic fluid source, the hydraulic fluid chamber communicating with the working chamber of the loading cylinder. A duct formed in the press shoe, or in a pipe attached to the press shoe, opens into the hydrostatic compartment and is connectible to the hydraulic fluid source.

Abstract: An elastic clamping ring for an enclosed shoe press roll used to clamp the jacket to the gables of the shoe press roll is disclosed. A rigid clamping ring is arranged on the inner side of each gable to form a groove which opens outwardly in the radial direction and in which the elastic clamping ring is received. A stop member is arranged radially outside the elastic clamping ring. By operation of securing members, the rigid clamping ring is forced in the direction of the peripheral gable part in order to squeeze the elastic clamping ring such that it expands outwardly in the radial direction and clamps the edge of the jacket between itself and the stop member. The invention also relates to a shoe press roll that uses an elastic clamping ring with a hexagonal cross section for clamping of the jacket of the shoe press roll to the gables of the shoe press roll.

Abstract: A shoe press for a paper or board machine, comprising a press shoe and a counter roll which between themselves form an extended nip for a paper or cardboard web and a circulated flexible belt, and at least one loading cylinder which is arranged between a supporting beam included in the frame system of the shoe press and the press shoe and adapted to press the press shoe against the counter roll. The press shoe is arranged on top of the loading cylinder and there is a device for releasably securing the loading cylinder on the supporting beam. With the aid of eccentric means arranged on upstream and downstream sides of the loading cylinder or cylinders, each loading cylinder is positionable in multiple locations in the machine direction for regulating the pressure profile of the shoe press.

Abstract: To carefully control the creping conditions when creping off a paper web (1) by means of a doctor blade (5) from the cylinder surface (2) of a Yankee dryer (3), a first sensor (82;85) is provided for measuring on-machine a value of the caliper, the crepe macrostructure, or some other property of the just creped off paper web (1), the measured value is monitored continually, and, on detecting an undesirable change in the value caused by blade wear, the doctor blade (5) is pivoted substantially around its working edge (6) to increase an impact angle (A), formed at the working edge and affecting the monitored web property, to such an extent as to minimize or at least counteract the undesirable change. Preferably, the sensor (82;85) is connected to a programmable processor (90) for automatically controlling the pivoting of the doctor blade (5).

Abstract: In order to meet higher demands for the properties of paperboard products an improved method and machine for the manufacture of paperboard are proposed according to the present invention in which a core of a paperboard web is formed in a second forming unit from a stock with a consistency of 1.5-6.0% being supplied to the fourdrinier wire of a fourdrinier former carrying a back layer formed previously in a first forming unit, from a headbox for high consistency stock and being dewatered upon being enclosed between the fourdrinier wire and a top wire in said second forming unit, and in which an underliner is formed in a third forming unit of stock with a consistency of 0.3-1.4% being supplied to the fourdrinier wire carrying the back layer and core, from a headbox for stock of low consistency.

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: A press roll intended, together with a press shoe, to cooperate with a counter roll to form a press with long nip for paper or board machines, said press roll comprising two end walls, a jacket, the edge portions of which are secured by an elastic clamping ring to peripheral parts of the end walls, a form-stable clamping ring being screwed to the inner side of the end-wall part to clamp the outwardly expandable elastic clamping ring so that the edge portion of the jacket is clamped firmly against a counter-support member. According to the invention each end wall includes guide means to provide a guided engagement relationship between the form-stable clamping ring and the end-wall part.

Abstract: An apparatus and method for winding tissue webs into a parent roll is disclosed which results in greater uniformity in sheet basis weight, machine direction stretch and bulk when comparing the corresponding sheet properties taken from representative locations throughout the roll. The apparatus and method includes engaging the tissue web against a reel spool with a flexible member such as a transfer belt which traverses an unsupported span between two support rolls. The web is transferred from the transfer belt to the parent roll as the parent roll is urged against the sheet/transfer belt at a point within the unsupported span. The resulting deflection of the transfer belt is detected and, in response, the reel spool position is changed to control the deflection at a desired level. Accordingly, a predetermined light nip pressure can be applied to the roll as the tissue web is wound thereon and large parent rolls of high bulk tissue can be manufactured with desired properties when unwound.