Abstract: The invention relates to a method for conveying and guiding a lead-in strip in a paper machine, in which method a lead-in strip is directed over a run of a conveyor in the paper machine and a longitudinal vacuum effect is produced across the run of the conveyor in the direction of moment of the run of the conveyor.

Abstract: A roll for a paper or board machine is produced by forming a tubular roll blank by bending out of a planar sheet or by means of centrifugal casting. The roll blank is first coated with a material having a modulus of elasticity and a density lower than those of steel and the coated roll blank is turned on a lathe to a desired shape and to a desired surface quality.

Abstract: A method for storing and handling a roll of a paper machine, board machine, or finishing machine includes using a special base arranged for the roll on which the roll is moveable from its operating location to a roll store and/or to a transport, or for storing the roll in the store. The base is made into a roll box inside of which suitable heat and humidity conditions are arranged for the roll. The conditions are maintained when using such a base or area as the roll store.

Abstract: A twin-wire former in a paper machine has two forming wire loops (10, 20), which define between themselves a twin-wire zone. At least one dewatering box (30) is located inside one of the wire loops (10, 20) to remove water through the wire from a web (W) being formed. At least one loading blade (40) is located opposite the dewatering box (30) inside the other wire loop (20; 10) in contact with the other wire. The dewatering box (30) includes at least three successive dewatering zones (30a, 30b) in which every second zone (30a) has a vacuum (p) and every second zone (30b) is vacuum-free. The at least one loading blade (40) is placed inside one of the wire loops (20; 10) at a location where it is opposed by a respective vacuum-free zone (30b), which is preceded and followed by a vacuum zone (30a).

Abstract: A device (10) for use in connection with a fabric (F) in a former or a press section of a paper machine comprises sub-assemblies which accomplish at least two of the following functions: guiding, spreading and/or cleaning of the fabric (F). The device (10) has an automatic guide (20) and a guide roll (40) for guiding the fabric (F), a curved spreader roll (30) for spreading the fabric (F), and a suction unit 19 for cleaning the fabric (F).

Abstract: Product package, comprising a data storage device, packaging material, and an authentication system. The authentication system comprises first and second coatings coated on the storage device and the packaging material. One of the coatings comprises chromogenic microcapsules capable of reacting to produce color. The other coating comprises color developer. The coatings can be bonded to each other or a composite coating can be a self-contained color former such as on the storage device. The invention further comprises methods of affirming authenticity of a data storage device. The method comprises applying to the storage device a color-reactable coating which can react with a color-producing second composition, packaging the storage device to provide a closed and sealed packaged, opening the package, and concurrent with or after opening the package, reacting the chemical compositions to produce the color as an indication of authenticity of the data storage device.

Abstract: Printable packaging paper for flexible packaging. A flexible overall print coating makes a first surface suitable for conventional printing. The print coating comprises clay, binder comprising acrylic and optionally PVOH, and microsphere shells, some optionally deformed. A barrier coating comprising PVOH, optionally acrylic, can be on the second surface. A multiple layer packaging structure can comprise such coated substrate and second and third strength layers of paper, and a flexible polyolefin barrier layer, all on the barrier coating side of the substrate, joined to the barrier coating. The flexible print coating can include titanium dioxide.

Abstract: A deflection compensated roll has a stationary support structure and a shell rotatably arranged around it by means of slide bearings. The shell is additionally supported on the support structure with hydraulic loading devices by which the axial profile of the shell can be controlled. In the procedure, at least the pressure acting in the main bearing elements of the slide bearings effective in oppsite directions in the nip plane is measured by conducting pressure data from a pressure space between a control valve associated with the main bearing elements and each main bearing element by means of measurement ducts outside the roll where the pressure data is passed to a pressure sensor.

Abstract: A high speed dryer section has single-wire draw drying groups (R1, RN). A paper or board web (W) is supported by a wire (F) as it meanders over drying cylinders (20) in an upper row and reversing cylinders/rolls (21) in a lower row. A first cylinder drying group (R1) has at least five drying cylinders. In the first cylinder drying group (R1) a runnability component (30) is placed in a pocket space defined by every two successive drying cylinders (20) and the reversing roll (21) between them and by the drying wire (F) for applying a high under-pressure of 1000-8000 Pa to an area (50Y) in which the web (W) separates from the drying cylinder (20), and by which runnability component (30) a lower under-pressure of 100-500 Pa is produced in at least part of the rest of the pocket space (T).

Abstract: A carbonless copy assembly made up of at least one CB sheet and one CF sheet, the CF sheet having a color developer resin coating of less than 0.39 pounds per ream. A process for making the carbonless copy paper assembly comprising the steps of: spraying a composition containing resin capable of developing microencapsulated dyes onto a base sheet to form a CF sheet, and combining that CF sheet with a CB sheet to form the carbonless copy paper assembly.

Abstract: Apparatus for pressing liquid from a liquid containing material is disclosed including a pair of juxtaposed rotary rolls forming a nip, at least one of the rolls being liquid permeable, that roll including an abduction surface extending laterally across the roll so that a portion of the liquid stream pressed out form the liquid containing material passing through the nip runs along the abduction surface, a liquid collector for collecting that portion of pressed out liquid extending laterally across the roll and including a liquid inlet for the pressed out liquid stream, and a return flow protector for preventing the pressed out liquid stream from rewetting the reduced liquid material formed in the nip.

Abstract: An ink jet coating composition comprising a blend of silicas, a blend of super and/or fully and partially hydrolyzed polyvinyl alcohols, and a cationic resin is provided, where ink jet recording materials prepared from such compositions demonstrate a balance of properties including improved imaging performance and good water resistance.

Abstract: A method and apparatus in ropeless tail threading in a multi-roll calender is disclosed wherein the threading tail is guided through the multi-roll calender in such a way that, before the multi-roll calender, the threading tail is guided first of all to the broke processing and then cut when the tail threading begins. The tail threading takes place in stages, so that at least once during the tail threading the threading tail in connection with the multi-roll calender is guided to broke processing and cut, after which the tail threading is continued, once the previous stage has succeeded.

Abstract: A paper or board machine having a double-felted first press nip and a double-clothed second press nip. According to the invention the first press nip has a suction roll with suction zone, the downstream end of which is situated downstream of the press nip, the top felt being separated from the bottom felt at a point before the downstream end of the suction zone. The bottom felt of the first press nip carries the web to the second press which has a top felt which carries the web from the bottom felt of the first press nip to the second press nip, which is an extended press nip. A pickup suction roll is arranged in the top felt loop of the second press for transfer of the web from the bottom felt of the first press to the top felt of the second press. The latter bottom felt leaves the suction roll at the downstream end of the suction zone and is provided in its loop with suction boxes situated at a point before the transfer of the web to the top felt of the second press.

Abstract: The present invention relates to a method and apparatus for coating a moving paper web (2), in which method the web (2) to be coated is passed to a coater station and the coating is applied to at least one surface of the moving web (2) by means of spraying nozzles (1) disposed in the interior of an enclosing hood (9). The web (2) is supported noncontactingly by means of air jets directed toward at least one side of the web (2).

Abstract: The invention relates to band-like doctor blade assembly, a doctor blade and a method in the use of the doctor blade. The doctor blade assembly includes continuous and substantially infinite doctor blade that is placed in a reel, the doctor blade is then fed into a blade holder. The blade holder includes locking devices in its connection for locking the doctor blade in the blade holder. The continuous and substantially infinite doctor blade has a plurality of edge notches formed along an edge thereof and the doctor blade is fed over a length substantially equal to the distance between the edge notches, while the notches are placed, during the operation of the doctor blade, at both ends of the blade holder and permit bending of the continuous band-like doctor blade.

Abstract: The invention concerns a method and a device in a paper machine, coating machine, intermediate winder, unwind stand of a slitter-winder, or in any other device for treatment of a web. In the event of disturbance, the web (P) is made to be wound in a controlled way around at least one web guide roll (18a).

Abstract: A method for controlling the temperature of a heated roll in a calender is provided. The calender comprises at least one heated roll or thermoroll and at least one backing roll, between which is formed a nip through which the material web is conveyed. To the heated roll is supplied internal thermal power by internal heating means of the roll, and external thermal power by external heating means of the roll. Before changing the heated roll, internal thermal power is minimized within a specific period by control means provided in conjunction with the internal heating means; external thermal power is maximized within a specific period by control means provided in conjunction with the external heating means; and the surface temperature of and/or the thermal power released by the heated roll, which corresponds to the surface temperature and/or thermal power desired for the grade of the material web, is maintained within a specific period.

Abstract: The invention concerns a storage box A 0 (10) for doctor blades employed in servicing of the face of a roll in a paper/board machine. The box is a polygon construction, in whose interior the reel (R) formed by doctor blades (t1, t2) has been fitted. Through an opening (11) in a side face of the storage box, the doctor blades (t1, t2, . . . ) can be discharged from the reel (R) placed inside the storage box (10). In its interior, the storage box (10) comprises bearing means, preferably at least one separate disk (10a3′), which has been fitted to revolve freely on the side face of the reel (R) formed by the doctor blades.

Abstract: A calender having a supporting frame and a set of rolls attached to vertical portions of the supporting frame so as to form a stack of rolls in which adjacent rolls placed one above another form calendering nips therebetween. The stack including a top roll, a bottom roll and a plurality of intermediate rolls between the top roll and the bottom roll. The intermediate rolls are attached revolvingly to arms pivoted on auxiliary frames attached to vertical portions of the supporting frame. A method of rebuilding a calender in which auxiliary frames are attached to the vertical portions of the existing calender frame and thereafter pivotal arms for the intermediate rolls are mounted on the auxiliary frames.