The doctor blade holder (7) comprises: a plurality of fingers (35) mounted on a beam (9), hinged around a rotation axis (37A) and configured to cumulatively form a housing seat (41) for the doctor blade (43); wherein the fingers (35) are pivotable independently from one another around said rotation axis (37A); at least one actuator (51) comprising at least one chamber (53) that can be inflated with pressurized fluid, configured and arranged so as to generate a thrust (f53) on the fingers (35) to make them pivot around said rotation axis (37A). Each finger (35) can be mounted and removed independently from the others on said beam (9).

Methods and apparatuses for applying coatings on a moving web are provided. A coating die and a back-up roll engage with each other. The back-up roll includes a shell rotatably supported by a pressurized air layer. When a coating material is dispensed from the coating die onto the web to form a liquid coating, the pressure of the air layer is controlled such that the shell translates in space to balance forces from the air layer and the coating bead, while the web is being translated to drive the shell.

A conditioning doctor blade (11) for a fiber web machine contains a number of reinforcement fiber layers (24, 26) laminated on top of one another into an epoxy matrix (20), and silicon carbide particles (21), so that the reinforcement fiber layers (24, 26) have formed a fiber core (22) and surface fiber layers (23) on both sides of the fiber core (22). There is less epoxy matrix (20) in the fiber core (22) than in the surface fiber layers (23).

The invention relates to steel Yankee cylinders for tissue-making machines and tissue-making machines using such steel Yankee cylinders wherein the outer surface (9) of the cylindrical shell of the steel Yankee cylinder is formed by a steel of the grade P690 as defined in European Standard EN 10028-6:2017 or a similar steel.

The invention below relates to a doctor blade device with an elongated doctor blade intended to operate continuously against a roll surface (2) and/or a cylinder surface (20) during scraping or wiping off material (IB) on the surface (20), which doctor blade device (5) comprises a carrier beam (10) adapted to the length of the roll surface or cylinder surface, which carrier beam has a clamping arrangement (4) for the positioning of a carrier part (3), arranged, in a groove in the longitudinal direction, to slidably carry the doctor blade (6), wherein the carrier part (3) comprises a carrier blade (30), a lip means (14) arranged at the carrier blade (30) and a spacer element (12) arranged between the lip means (14) and the carrier blade, wherein the carrier blade (30), the lip means (14), and the spacer element (12) are arranged, along a first long side edge of the carrier blade (30) between them, to form said groove (15) for slidable positioning in the longitudinal direction of the doctor blade (6) by support of the carrier blade (30), the lip (14), and the spacer element (12).

An apparatus (1) for cleaning industrial plants comprises a robotic arm to a working head of which are associated suction members suitable for sucking powders and working fragments inside a working volume in which a processing industrial plant is installed (L). The working head comprises an extensible manifold for moving the suction mouth (40) away from the end of the robotic arm thus allowing to reach remote positions and moreover the robotic arm (10) is mounted on moving members, for example a portal, which allow the robotic arm to be moved at different useful working volumes so that an accurate cleaning can be performed on a very large overall volume.

A doctor blade holder (7) for a doctor blade (43) adapted to coact with a cylindrical surface (1S) of a rotating cylinder (1). A plurality of fingers (35) are mounted on a beam (9), hinged around a rotation axis (37A) and configured to cumulatively form a housing seat (41) for the doctor blade (43). The fingers (35) are pivotable independently from one another around the rotation axis (37A). At least one elastic thrust member (51) is configured and arranged to generate a thrust on the fingers (35) to make them pivot around the rotation axis (37A). Each finger (35) has a locking element (67), to rigidly lock the finger to the beam (9).

The invention embodies the application of different combinations of the monitoring and data processing aspects as a means to develop an early warning chatter alarming system. Configuring an early warning chatter alarming system can be as simple as using n alarm settings to develop an alarming strategy from different trend conditions such as overall RMS, selected vibration frequencies, slope analysis, and wavelet analysis. A higher level of alarming is provided by using a time integrated approach to account for both intensity of the alarm variable and duration. Combining these different aspects with a predictive model incorporates process-operating conditions to enhance the alarming sensitivity for earlier detection and reduce false positives. Finally, combining the different alarming aspects with a rule-based decision making approach such as fuzzy logic allows alarming based on qualitative analysis of different data streams.

The invention embodies the application of different combinations of the monitoring and data processing aspects as a means to develop an early warning chatter alarming system. Configuring an early warning chatter alarming system can be as simple as using n alarm settings to develop an alarming strategy from different trend conditions such as overall RMS, selected vibration frequencies, slope analysis, and wavelet analysis. A higher level of alarming is provided by using a time integrated approach to account for both intensity of the alarm variable and duration. Combining these different aspects with a predictive model incorporates process-operating conditions to enhance the alarming sensitivity for earlier detection and reduce false positives. Finally, combining the different alarming aspects with a rule-based decision making approach such as fuzzy logic allows alarming based on qualitative analysis of different data streams.

The invention below relates to a doctor blade device with an elongated doctor blade intended to operate continuously against a roll surface (2) and/or a cylinder surface (20) during scraping or wiping off material (IB) on the surface (20), which doctor blade device (5) comprises a carrier beam (10) adapted to the length of the roll surface or cylinder surface, which carrier beam has a clamping arrangement (4) for the positioning of a carrier part (3), arranged, in a groove in the longitudinal direction, to slidably carry the doctor blade (6), wherein the carrier part (3) comprises a carrier blade (30), a lip means (14) arranged at the carrier blade (30) and a spacer element (12) arranged between the lip means (14) and the carrier blade, wherein the carrier blade (30), the lip means (14), and the spacer element (12) are arranged, along a first long side edge of the carrier blade (30) between them, to form said groove (15) for slidable positioning in the longitudinal direction of the doctor blade (6) by support of the carrier blade (30), the lip (14), and the spacer element (12).