Abstract: The roll of a paper/board machine or finishing machine has an inner elongated structure (11; 104) which is at least partly comprised of composite material, including reinforcing fibers in matrix material. The structure is preferably comprised of a combination of metallic material and composite material.

Abstract: The roll of a paper/board machine or finishing machine has an inner elongated structure (11; 104) which is at least partly comprised of composite material, including reinforcing fibers in matrix material. The structure is preferably comprised of a combination of metallic material and composite material.

Abstract: A method for fitting a tubular roll shell (2) of a roll (1) in a paper or board machine. In the method, the roll shell (2) is supported on a stationary roll shaft (3) by means of hydrostatic slide bearing elements (4a, 4b; 4a?, 4b?; 5a, 5b; 5a?, 5b?), acting on the roll shell (2) in radially opposite directions, at least in the direction of a plane co-directional with a first plane or a plane parallel to a primary loading (F) and in a plane substantially lateral to a plane co-directional with the primary loading (F). The slide bearing elements (4a, 4b, 4a?, 4b?, 5a, 5b, 5a?, 5b?) are loaded hydraulically by means of a pressure fluid.

Abstract: The invention relates to a method for providing a roll (1) for a paper machine with sliding bearings, the roll comprising a stationary roll axle (3) and a tubular roll mantle (2) arranged to revolve around it. In the method, the roll mantle (2) is supported on the roll axle (3) by means of hydraulic sliding bearing members (4a, 4b, 5a, 5b; 25, 28; 40a, 40b) which are arranged to accomplish radial fitting with bearings of the roll mantle in the loading direction and in the lateral direction with respect to it, and the axial fitting with bearings of the roll mantle. The sliding bearing members are loaded by means of a hydraulic medium, the feed of which to the sliding bearing members is controlled by means of control valves (6; 30; 40).

Abstract: The present invention relates to an end packing (20, 40, 60, 70, 80) for a deflection compensated roll. The roll including a stationary shaft (1) and a roll shell (2), bearing-mounted rotatably therearound and having each end thereof provided with a shaft-enclosing annular end cap (3). The end cap (3) has its surface internal in the axial direction of the roll or its surface external in the axial direction formed with a sealing surface (10, 50, 61, 71, 81). The end packing elements (20, 40, 60, 70, 80) are provided with an annular packing member (12; 42; 62; 72; 82) extending around the shaft (2) and including a front face, which is directed towards said sealing surface (10, 50, 61, 71, 81) and which is in contact with the sealing surface (10, 50) or separated from the sealing surface (61, 71, 81) by a gap constituting an axially directed narrow slot.

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: The roll comprises a stationary support construction (11) and a roll mantle (12) revolving around the construction, which mantle is supported from its inner face (12′) on the support construction (11) by at least one hydraulically loaded loading member (13), by which the roll mantle (12) is loaded against a backup roll (20) which forms a nip (N) with the roll. The oil removing arrangement comprises an oil collecting equipment (90) fitted in the space between the outer face (11″) of the support construction (11) and the inner face (12′) of the roll mantle (12), in which oil collecting equipment there is an oil guide plate (91) which is supported at least on the support construction (11), which is arc-shaped in the direction of the circumference and which forms a first oil guide face. At the lateral edges of the oil guide plate (91), there are radial side walls (93,94) directed towards the support construction, and at the curved rear edge there is a curved rear wall (92).

Abstract: The present invention relates to an end packing (20, 40, 60, 70, 80) for a deflection compensated roll. The roll including a stationary shaft (1) and a roll shell (2), bearing-mounted rotatably therearound and having each end thereof provided with a shaft-enclosing annular end cap (3). The end cap (3) has its surface internal in the axial direction of the roll or its surface external in the axial direction formed with a sealing surface (10, 50, 61, 71, 81). The end packing elements (20, 40, 60, 70, 80) are provided with an annular packing member (12; 42; 62; 72; 82) extending around the shaft (2) and including a front face, which is directed towards said sealing surface (10, 50, 61, 71, 81) and which is in contact with the sealing surface (10, 50) or separated from the sealing surface (61, 71, 81) by a gap constituting an axially directed narrow slot.

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 method for fitting a tubular roll shell (2) of a roll (1) in a paper or board machine. In the method, the roll shell (2) is supported on a stationary roll shaft (3) by means of hydrostatic slide bearing elements (4a, 4b; 4a′, 4b′; 5a, 5b; 5a′, 5b′), acting on the roll shell (2) in radially opposite directions, at least in the direction of a plane co-directional with a first plane or a plane parallel to a primary loading (F) and in a plane substantially lateral to a plane co-directional with the primary loading (F). The slide bearing elements (4a, 4b, 4a′, 4b′, 5a, 5b, 5a′, 5b′) are loaded hydraulically by means of a pressure fluid.

Abstract: The roll comprises a stationary support construction (11) and a roll mantle (12) revolving around said construction, which mantle is supported from its inner face (12′) on the support construction (11) by means of at least one hydraulically loaded loading member (13), by whose means the roll mantle (12) is loaded against a backup roll (20) which forms a nip (N) with the roll. The oil removing arrangement comprises an oil collecting equipment (90) fitted in the space between the outer face (11″) of the support construction (11) and the inner face (12′) of the roll mantle (12), in which oil collecting equipment there is an oil guide plate (91) which is supported at least on the support construction (11), which is arc-shaped in the direction of the circumference and which forms a first oil guide face. At the lateral edges of the oil guide plate (91), there are radial side walls (93,94) directed towards the support construction, and at the curved rear edge there is a curved rear wall (92).

Abstract: The invention relates to a structure suitable for manufacturing by the fabrication techniques of micro-electronics so as to include an optically black surface that functions as an absorber or emitter, respectively, over a predetermined wavelength range, the structure includes a electrically nonconducting support layer (1), a metallic mirror layer (2) made on the support layer (1), and a lossy layer (4) made on the support layer (1) and the metallic mirror layer (2) superimposed thereon. According to the invention, the mirror layer (2) is made on the upper surface of the support layer (1) and the lossy layer (4) is made from a doped semiconductor material. The thickness of the multilayer structure (3, 4, 7) and the doping of the lossy layer (4) are predetermined relative to each other so that the mirror layer (2) will be optically matched over the predetermined wavelength range of absorption or emission, respectively, to the medium surrounding the structure.

Abstract: The invention relates to an overpressure protector comprising a body portion (1) of single crystal silicon, a burst flow conduit (2) extending through the body portion (1), and a membrane (3) covering the burst flow conduit (2) and responding to a pressure difference. The membrane is a thin film (3), which is arranged to break when the pressure difference acting across it exceeds a predetermined value, and comprises a belt (6) whose electrical conductivity differs from that of the other material of the membrane. The belt is connected to means (9) for supplying electric current either for detecting breaking or the belt or for bursting the membrane (3) intentionally by means of heating effect of electric current.

Abstract: A gradient calender including two calender rolls arranged to form a calendering nip, at least one of the rolls being a hard-faced calender roll which is heatable to a high temperature whereby a web is passed through the calendering nip for hot calendering the web. At least one of the calender rolls is arranged to be loaded toward the calendering nip by a respective variable-crown support roll so that an auxiliary nip between the support roll and the respective calender roll and the calendering nip are in a common nip plane. Deflection of the calendering nip and the calender rolls is substantially prevented by the effect of the load produced by hydraulic loading devices arranged in the support roll.

Abstract: The invention is related to an electrically modulatable thermal radiant source with a multilayer structure. The radiant source includes a substrate, a first insulating layer formed onto the substrate, a radiant surface layer formed onto the first insulating layer, a second insulating layer formed on the radiant surface layer, a first metallization (incandescent filament) layer formed on the second insulating layer, a third insulating layer formed on the first metallization layer, and a second metallization layer for contacting formed on the third insulating layer. According to the invention, very thin incandescent filaments are formed from the first metallization layer and surrounded by the other elements of the multilayer structure as a uniform, planar plate.

Abstract: A miniaturized spectrometer for gas concentration measurement includes a radiation source for admitting electromagnetic radiation onto the gas to be measured, a detector for detecting the radiation transmitted through or emitted from the gas, an electrically tunable Fabry-Perot interferometer placed in the path of the radiation prior to the detector, control electronics circuitry for controlling the radiation source, the interferometer and the detector. The radiation source, the detector, the interferometer and the control electronics are integrated in a miniaturized fashion onto a common, planar substrate and the radiation source is an electrically modulatable micromechanically manufactured thermal radiation emitter.

Abstract: A single-channel gas concentration measurement method and apparatus. According to the method, a radiant source is employed to generate a measuring signal, the measuring signal is subsequently directed to a measurement object containing a gas mixture to be measured, the measuring signal is subsequently bandpass filtered using at least two passband wavelengths, and the filtered measuring signals are detected by a detector. According to the invention, the bandpass filtering step is implemented by a single electrostatically tunable, short-resonator Fabry-Perot interferometer.

Abstract: An electrically modulatable radiant source includes an essentially planar substrate, a well or hole formed in the substrate, and at least one incandescent filament attached to the substrate. The incandescent filament is aligned with the well or hole and is formed of a metallic compound which readily oxidizes at an operating temperature of the incandescent filament. An oxidation resistant film encapsulates the incandescent filament to prevent the filament from oxidizing. Furthermore, contact pads are formed on the substrate at both ends of the incandescent filament for feeding electric current to the incandescent filament.

Abstract: An oil feed system for a variable-crown roll which includes a stationary roll axle, a roll mantle arranged revolvingly on the roll axle and hydraulic loading elements acting upon an inner face of the roll mantle in a radial direction and supporting the roll mantle on the roll axle. The loading elements function to regulate the axial profile of the roll mantle. In the roll axle, an axial through hole is formed which communicates with cylinder bores in which the hydraulic loading elements are arranged through substantially radial bores or equivalent ducts. In the axial through hole, at least through one of the roll ends, oil feed pipes are installed and through which pipes, a pressure fluid is fed to the hydraulic loading elements. Into the axial through hole in the roll axle, at the location of the loading elements, an intermediate flange is installed, which operates as a distributor piece and is connected with the loading element.

Abstract: An electrostatically tunable Fabry-Perot interferometer produced by surface micromechanical techniques is used in optical material analysis as an optical sweeping filter in which the optical measurement wavelength is centered at a wavelength .lambda.. The Fabry-Perot interferometer based sensor structure comprises a body block, two essentially parallel mirrors bonded to the body block, of which mirrors at least one is partially transmitting and movable relative to the body block. The mirrors are spaced maximally by a few half-wavelengths, .lambda./2, from each other, and both of the mirror structures include integral electrode structures capable of effecting an electrostatic force between the mirror structures. The movable mirror structure is provided with structurally weakened regions surrounding the optical area of the mirror so as to facilitate keeping the optical area at a maximum degree of flatness.