A wear element is disclosed that includes at least two layers of a structural material and at least one layer of a non-solid metal material, wherein the non-solid metal material includes a non-homogenous edge for contacting a roll surface.

The invention relates to a system (1) and a method for collecting and handling dust in a paper-making environment. The system (1) comprises a source of underpressure (2) and an elongated collector (4) that extends along a longitudinal axis and which elongated collector (4) is connected to the source of underpressure (2) through at least one suction duct (7) such that underpressure can be generated inside the elongated collector (4). The elongated collector (4) has an inlet (5) through which dust-laden air can enter the elongated collector (4) and an exit opening (6) leading to the suction duct (7) through which exit opening (6) dust-laden air can be evacuated from the elongated collector (4). A source of water (8) is connected by at least one water supply duct (10) to the elongated collector (4) such that water from the source of water (8) can be introduced into the elongated collector so that dust in the dust-laden air can be exposed to and mix with the water introduced into the elongated collector (4). A flow meter (12) is functionally connected to the system (1) to measure at least one of a flow of water from the source of water (8) to the elongated collector (4) or a flow of water exiting from the elongated collector (4) through the exit opening (6) of the elongated collector (4) and arranged to send a signal indicating a numerical value for a flow of water that reaches or leaves the elongated collector (4) such that this value can be compared to a predetermined minimum value. The system is used to carry out the inventive method.

The invention relates to a system (1) and a method for collecting and handling dust in a paper-making environment. The system (1) comprises a source of underpressure (2) and an elongated collector (4) that extends along a longitudinal axis and which elongated collector (4) is connected to the source of underpressure (2) through at least one suction duct (7) such that underpressure can be generated inside the elongated collector (4). The elongated collector (4) has an inlet (5) through which dust-laden air can enter the elongated collector (4) and an exit opening (6) leading to the suction duct (7) through which exit opening (6) dust-laden air can be evacuated from the elongated collector (4). A source of water (8) is connected by at least one water supply duct (10) to the elongated collector (4) such that water from the source of water (8) can be introduced into the elongated collector so that dust in the dust-laden air can be exposed to and mix with the water introduced into the elongated collector (4). A flow meter (12) is functionally connected to the system (1) to measure at least one of a flow of water from the source of water (8) to the elongated collector (4) or a flow of water exiting from the elongated collector (4) through the exit opening (6) of the elongated collector (4) and arranged to send a signal indicating a numerical value for a flow of water that reaches or leaves the elongated collector (4) such that this value can be compared to a predetermined minimum value. The system is used to carry out the inventive method.

The invention relates to a dust-handling device (1) for collecting and handling dust in a paper-making environment wherein the dust-handling device (1) comprises a source of underpressure (2) and an elongated collector (3) that extends along a longitudinal axis. The elongated collector (3) is connected to the source of underpressure (2) such that underpressure can be generated inside the elongated collector (3) and the elongated collector (3) has an inlet (5) through which dust-laden air can enter the elongated collector (3) and an exit opening (6) through which dust-laden air can be evacuated from the elongated collector. The inlet (5) of the elongated collector (3) is disposed in such a relation to the longitudinal axis of the elongated collector (3) so that upon drawing the dust-laden air into the elongated collector (3), an air vortex is induced with the dust-laden air wherein the induced air vortex flows between the collector inlet (5) and the collector exit opening (6). A source of water (7) is connected to the elongated collector such that water can be introduced into elongated collector (3) so that dust of the dust-laden air can be exposed to and mix with the water introduced into the elongated collector (3). According to the invention, a dust removal device (8, 10) is mounted on the elongated collector and arranged to act against the inlet (5) to remove dust that has clogged the inlet (5).The invention also relates to a method in which dust clogging the inlet (5) is removed.

An apparatus and a method for applying a liquid active substance onto surfaces moving in a circulating manner, including a metering unit with a pipe system and an application unit. The active substance is conducted to the application unit by the metering unit, and the application unit has a pad with an open-pore mesh structure for receiving and storing the active substance and for applying the active substance onto a moving surface as a film as a function of the degree of saturation and the contact pressure of the pad on the moving surface. Brackets fix the pad in a working position when pushed together and are capable of being pulled apart to exchange the pad. Also, the use of the apparatus for keeping the moving surfaces free from deposits, accumulations or contaminants.

An apparatus and a method for applying a liquid active substance onto surfaces moving in a circulating manner, including a metering unit with a pipe system and an application unit. The active substance is conducted to the application unit by the metering unit, and the application unit has a pad with an open-pore mesh structure for receiving and storing the active substance and for applying the active substance onto a moving surface as a film as a function of the degree of saturation and the contact pressure of the pad on the moving surface. Brackets fix the pad in a working position when pushed together and are capable of being pulled apart to exchange the pad. Also, the use of the apparatus for keeping the moving surfaces free from deposits, accumulations or contaminants.

A set for maintenance of a doctor blade (10) positioned within a doctor blade holder (11) in a fiber web machine has a portable device (14) for moving the doctor blade (10) out from the doctor blade holder (11). A prolonged doctor blade holder (11) extends outwardly from the doctor blade holder, and a safety cage (15) is positioned in the area of an end of the doctor blade holder (11). The invention also relates to a doctor arrangement for a fiber web machine.

Vibration sensors can be used in paper making systems and methods to determine various aspects of the paper making operation. Vibration sensors, for example, positioned on cleaning blades configured to clean various deposits off of rollers in a paper making system can output vibration data that can be indicative of the vibration of the blade. The vibration data can be analyzed in order to characterize the cause of the vibration and/or the location of the vibration within a paper making system. If the vibration data satisfies a predetermined condition, a corrective action can be initiated. Different corrective actions can be initiated based on the characterized cause and/or location of the vibration in order to effectively improve the operation of the system while minimizing costly system shut downs and major maintenance.

A pneumatically actuated doctoring device for paper machine de-watering/paper forming is provided having a base member supported on a papermaking machine structure, and a blade support with a fabric contact element. A single pneumatic air tube having first and second attachments on opposing sides is also provided. The first attachment engages the base member and the second attachment engages the blade support. The tube is configured for connection to a pressurized air source and a vacuum source to extend or retract the blade support. A linkage arrangement is connected between the blade support and the base member and includes first and second links located between the base member and the support member. The links each have a pivotal connection to the base member and provide for a fixed orientation of the blade support relative to the base member as the pneumatic air tube extends or retracts the blade support.

A pneumatically actuated doctoring device for paper machine de-watering/paper forming is provided having a base member supported on a papermaking machine structure, and a blade support with a fabric contact element. A single pneumatic air tube having first and second attachments on opposing sides is also provided. The first attachment engages the base member and the second attachment engages the blade support. The tube is configured for connection to a pressurized air source and a vacuum source to extend or retract the blade support. A linkage arrangement is connected between the blade support and the base member and includes first and second links located between the base member and the support member. The links each have a pivotal connection to the base member and provide for a fixed orientation of the blade support relative to the base member as the pneumatic air tube extends or retracts the blade support.