Abstract: The invention concerns a method and a device for removing water out of the perforations in a suction roll wherein a doctor blade is brought into contact with the face of the suction roll. The doctor blade is mounted with its slat face in such an angular position in relation to the face of the suction roll that the angle between the face plane of the doctor blade and the tangential direction of the face of the suction roll, when the tangent is drawn at the contact point between the tip of the doctor blade and the face of the suction roll, is from about 2.degree. to about 10.degree.. In the method, water is removed by means of the inlet-side surface plane of the doctor blade, the inlet side being seen in the sense of rotation of the suction roll, and the water is allowed to flow smoothly over the doctor blade out of contact with the construction.

Abstract: The invention concerns a roll or cylinder or roll coating for a pulp machine, paper machine, or paper finishing machine, in which application the roll or equivalent comprises a cylinder mantle of cast iron or steel or any other, equivalent metal, which bears the mechanical loads. On the rollor cylinder mantle, fixed to the outer face of the frame mantle, there is a resilient polymer coating, and onto said polymer coating a coating is fixed which is by several orders thinner than the radial thickness of the polymer coating. Said coating fixed onto the outer face of the polymer coating is a metal, ceramic, or cermet coating or a plastic coating. The invention further concerns a method for the manufacture of a roll coating in accordance with the invention as well as the use of such rolls and coatings.

Abstract: A method in a drying group or groups provided with a single-wire draw in a multi-cylinder dryer of a paper machine in the draw of a web. The multi-cylinder dryer comprises drying cylinders heated by means of steam or equivalent, with the web being pressed by a drying wire against the cylinder faces of these drying cylinders. The multi-cylinder dryer has leading or lower cylinders on which the web runs outside the drying wire which is, for example, a felt. The leading cylinders or rolls are provided with holes passing through a mantle of the leading cylinders or rolls, these holes being fitted to open into an inner space of negative pressure within the leading cylinder or roll and to open, at an opposite end, into grooves provided on a mantle face of the rolls. The negative pressure inside the roll is arranged to be transmitted to the grooves provided on the outer face of the roll mantle, so that an adhesion force is applied to the web through the grooves.

Abstract: A method for reconditioning of the sealing face (11) at the opening of the manhole (10) of a drying cylinder (K) of a paper machine when the cylinder (K) is in its operating position in the paper machine. In the method a separate frame part (13) is attached to the cylinder end. The frame part (13) comprises guides (15a, 15b), along which a machining unit (16) is displaced which is fitted to machine the sealing faces. Also disclosed is a device for use in the method.

Abstract: The present invention concerns a method and a device for the balancing of a roll. Fluidizable balancing agent is placed onto a face of the roll at a location required by the balancing, at which the agent adheres and hardens.

Abstract: The present invention concerns a roll used in the manufacture of paper, for example a central roll in a press or a calender roll, with which the web is in direct contact and from which the web is detached. A coating has been formed onto a cylinder mantle of the roll, the coating being partly made of metal and also including a ceramic material. An outer face of the coating is formed of carbide-rich areas and of matrix areas placed between the carbide-rich areas. The present invention also concerns a method for manufacturing such a roll.

Abstract: A method for use in web drying apparatus, such as a drying section of a coating or paper machine which includes drying cylinders against the outer mantles of which a web to be dried is pressed in direct contact, and wherein the web is carried from one drying cylinder to the next supported on a wire which passes from a drying cylinder over an intermediate leading cyclinder where the web is carried on the outer side of the wire out of direct contact with an outer mantle of the leading cylinder, and then to the next drying cylinder, comprises the steps of maintaining a negative pressure in a pocket space defined between a pair of successive drying cylinders and the web-supporting wire for suctioning the web into contact with the wire as it runs from one drying cylinder to the intermediate leading cylinder and from the intermediate leading cylinder to the next drying cylinder, and providing the leading cylinder with a perforated outer mantle and maintaining a negative pressure within the interior of the outer man

Abstract: A method is provided for the removal of water from a web by hot-pressing while the web is in direct contact with a heated cylinder face. The web is passed, while being supported by a press fabric, through at least two separate press stages. The web is first passed into direct contact with the heated cylinder face and into an extended-nip press stage. At the beginning the extended-nip press stage, a press-glide belt is passed into contact with the press fabric, the press-glide belt is pressed by means of a press member in the extended-nip stage against the heated cylinder face. This press-glide belt is separated from the fabric and the web is passed to the next stage where the web is pressed against a cylinder face only by means of the tension of the press fabric. After this latter stage, the web is passed to an intensive roll-nip pressing stage, through a roll-nip which is formed between the hot cylinder and a hollow-faced press roll.

Abstract: A method is provided for measuring and regulating the quantity of coating in surface sizing or pigmenting of paper or board, wherein the coating agent is spread by means of a coating device in the form of a film onto the face of a roll in a size press. The film is transferred from the roll face onto the paper or board in the size press nip. A fluorescent marker agent is mixed into the roll coating or into the coating agent and the measurement of the coating quantity is carried out by means of X-ray fluorescence technique from the face of the size press roll before the film of coating agent is transferred onto the web.

Abstract: The invention concerns a method for regulation of the moisture profile of a paper or board web in a size press in which the paper or board web (W) is made to run through a nip (N) formed by the rolls (1,2) in the size press. Films (F.sub.1, F.sub.2) of size are applied to the faces (3,4) of the rolls in the size press by means of coating devices (10,20) so that these films (F.sub.1 F.sub.2) of size are transferred onto the paper or board web (W) in the roll nip (N). A size (F.sub.1) of substantially invariable profile is spread onto the face (3) of the first roll in the size press (5), and the profile of the size film (F.sub.2) to be spread onto the face (4) of the second roll is regulated so that the moisture profile of the web (W) at the reel-up can be made substantially invariable. The invention also concerns a film size press for implementing the method.

Abstract: The invention concerns a method in calendering, wherein one or several pairs of rolls are employed through which the web to be calendered runs. One roll in each pair of rolls is a hard roll which is a heated metal roll, and the other roll in each pair of rolls is a roll provided with a resilient coating. In the method, the face of the roll with a resilient coating is also heated to a high temperature, advantageously to the same temperature as the heated metal roll. The invention also concerns a roll used in the method as well as the use of the method and of the roll.

Abstract: This publication discloses a method for the determination of size and location of end heads in a roll wrapper. According to the method, the end head is transferred by means of a pickup arm over photocells and the instants of photocell output signal changes are measured. The distances between the intersect points are determined on the basis of the obtained intersect times and the speed of the end head, and the size and location of the end head are then determined on the basis of the obtained intersect distances and the distance between the photocells. The obtained measurement results are used for controlling the end heading machine.

Abstract: Method and device in a compact press section of a paper machine for replacement of press rolls and fabrics. Above the compact combination of press rolls, there is an open space between the front frame and the rear frame of the press section. By means of this space, the press rolls and the upper fabrics can be replaced by raising and lowering, e.g. by means of a crane mounted on the ceiling. The press roll that forms the second press nip in the press section together with the center roll is supported on an opening and loading mechanism to which hydraulic cylinders are connected, by means of which cylinders both the second nip is loaded with a suitable linear load and the mechanism is pivoted to the open position or positions. The movements of lateral parts of the mechanism are synchronized with each other by means of a connecting part fitted between them.

Abstract: The invention concerns a method and an apparatus in a paper machine, in particular in its drying section, for intensification of the drying of the paper. In the method the paper web (W) is passed on support of a drying fabric onto a drying cylinder (K). In the method, in connection with the drying cylinder (K), a separate suction device (10) is employed, which is fitted at a distance (F) from the drying fabric, e.g. a wire (H), which follows the face of the drying cylinder. In the method, by means of the suction device (10), the boundary layer (S.sub.1) of moist air, which has been formed on the face of the drying fabric (H), is suctioned off, whereby the drying process is promoted.

Abstract: A method for the manufacture of the cylindrical mantle (10) of the rolls or cylinders of a paper machine out of a corrosion-proof metal or alloy material, particularly refined steel, comprises cutting oblong plate blanks (20A) of a length equal to the total length of the roll mantle to be manufactured. The plate blanks (20A ) are machined or bent to mantle portions (20) of a cross-sectional shape equal to a part of a circular ring. Out of the mantle portions (20), the cylindrical mantle of a roll or cylinder is assembled by joining the mantle portions (20) together by means of axial welding joints (14) prepared by electron-beam welding performed in the vacuum chamber of an electron-beam aparatus by using a number of mantle portions (20) per one roll mantle (10). A roll or cylinder manufactured by means of the method is also described.

Abstract: The press roll cooperates with a counter roll to form a press with a long nip for paper or board machines. The press roll has two end walls; a flexible jacket secured to the end walls; and support members for the end walls. The end walls have bearings for permitting rotation of the jacket and the end walls in relation to the support members. A press shoe of the press roll cooperates with the counter roll to form a pressing zone. Attachment assemblies each have a circular clamping member, which includes a wedge body, and a circular groove disposed on the inside of the end wall to receive the edge portions of the jacket and the wedge body, the groove and wedge body being provided with cooperating wedge forming surfaces. Further, the clamping member includes bolts for pushing the wedge body into the groove and retaining it therein in order to clamp the edge portions of the jacket by means of wedge action, against the end wall.

Abstract: The invention concerns a suction roll (10) for a paper making machine, on which the paper web is pressed towards the outer face of the roll mantle. The suction roll (10) is divided, in the axial direction of the roll, into at least three vacuum spaced (A.sub.1, A.sub.2, A.sub.3). In the interior of the suction roll (10), there are at least two partition walls (17a, 17b), by means of which the suction space (13) is divided into separate zones of negative pressure. The lateral vacuum spaces (A.sub.1, A.sub.3) in the suction space can be subjected to a higher negative pressure than the vacuum space (a.sub.2) in the middle area of the roll, whereby the profile of negative pressure is formed such that the negative pressure increases across the width of the roll towards the lateral areas. The invention also concerns a method for producing a desired pressure profile for a suction roll.

Abstract: An on-machine calender device intended to be on-line connected to a paper machine. The calender comprises a number of subsequent calendering nips, through which the web (W) to be calendered can be passed. The nips are formed between a soft calender roll and a hard calender roll or between two soft calender rolls. The calender is composed of one or several, for example two, subsequent calender modules (M.sub.1, M.sub.2). The modules comprise one counter-roll (10, 20) and at least two soft calendering rolls (11, 12, 13; 21, 22, 23), which are placed at both sides of the counter-roll (10, 20) in the direction of running of the web (W). The calender rolls (10, 11, 12, 13;20, 21, 22, 23) are dispaceable in relation to each other so that the threading of the web (W) can be carried out as a straight run, for which purpose an open passage is opened through the calender.

Abstract: Upper blade holder intended for shear cutting of materials that run in a plane by means of a revolving pair of blades, wherein the toe-in angle of the upper blade can be set by means of a control prism. The upper blade holder comprises an upper blade journalling supported from both sides of the blade, which said journalling can be replaced without tools. The upper blade holder further comprises a protective cover of the upper blade, which said cover can be replaced without tools. This blade cover, together with the frame of the upper blade holder, encloses the upper blade and the lowering arms for the upper blade journalling. Moreover, the upper blade journalling comprises an actuator, by means of which the blade is displaced to the cutting position.

Abstract: Method and device in a compact press section of a paper machine for balancing of its static and dynamic properties as well as for replacing of the press rolls and fabrics. The press rolls form a compact press roll combination. A space is located in and above the press roll combination between the front and rear frame parts which can be opened and closed. By means of this space at least the upper fabrics and the upper press rolls in the press section are replaced by means of a crane mounted on the ceiling or equivalent, preferably substantially by direct raising and lowering. The front and rear frame parts are interconnected rigidly at and above the press roll combination by means of a rigid intermediate frame part. The intermediate frame part operates as the frame part of the tensioning device of the first upper fabric, and the intermediate frame part together with the upper fabric tensioning device and the tensioning roll.