A method of making a fibrous sheet. The method includes forming a nascent web from an aqueous solution of papermaking fibers, dewatering the nascent web to form a dewatered web having a consistency from about ten percent solids to about seventy percent solids, moving the dewatered web on a transfer surface, and transferring the dewatered web from the transfer surface to a molding roll at a molding zone. The molding roll includes an exterior and a patterned surface on the exterior of the molding roll. Papermaking fibers of the dewatered web are redistributed on the patterned surface in order to form a molded paper web. The method also includes transferring the molded paper web to a drying section and drying the molded paper web in the drying section to form a fibrous sheet.

A papermaking machine includes a Yankee dryer, a doctor, and a doctor blade loading control system. The doctor blade loading control system includes a first doctor loading cylinder coupled to the doctor and configured to selectively apply a loading force to the doctor, a second doctor loading cylinder coupled to the doctor and configured to selectively apply a loading force to the doctor, a first air line in communication with the first doctor loading cylinder, a second air line in communication with the second doctor loading cylinder, a first electronic pressure controller configured to control a loading pressure of the first doctor loading cylinder on the doctor based on a first loading pressure setpoint, and a second electronic pressure controller configured to control a loading pressure of the second doctor loading cylinder on the doctor based on a second loading pressure setpoint.

A planar element is disclosed for use in a papermaking system. The planar element is suitable for use as a doctor blade or a top plate and includes a three-dimensional composite structure including elongated elements extending in at least three orthogonal directions, and a resin in which the three-dimensional composite structure is embedded.

A pneumatic hood for a tissue or papermaking machine is disclosed. The hood has an inlet to admit dust and air. The inlet is defined, in part, by an inlet flap that is hingedly connected to the body of the hood. The inlet flap is coupled to one or more linear actuators, such as pneumatic cylinders, by a linkage such that the linear actuators drive the inlet flap between positions in which the inlet is wider and positions in which the inlet is narrower. Thus, the size of the inlet can be increased to clear large obstructions.

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).

A device for spraying a coating chemical onto a moving surface (1) of a papermaking machine includes a machine-wide box body (2) extending in a cross machine direction and defines an internal space configured to enclose part of a spraying equipment (3) and also defines an elongate opening (22) facing said moving surface (1). The spraying equipment (3) includes a plurality of spray nozzle members (30) for spraying coating chemical through said opening (22) onto the moving surface (1), a coating chemical supplying tube (32) is connected to the nozzle members (30), and a plurality of valves (33) are mounted on the coating chemical supplying tube (32), one for each nozzle member (30). To make it possible to change a nozzle member (30) without requiring that the coating chemical supplying tube (32) has to be pulled out of the box body (2), and where the nozzle change can be carried out with less risk for the operator to any danger, the coating chemical supplying tube (32) with said valves (33) is located outside of the box body (2), and the nozzle members (30) extend through a wall portion (36) of the box body (2) and are mounted to be individually movable axially to permit removal of anyone of them independently of the other ones.

A blade for creping a paper web from a Yankee cylinder surface is made of a steel substrate having a thickness of 0.7 mm-2 mm. The steel substrate is covered by a cermet coating that forms a working edge adapted for contact with the surface and a web impact area upon which the web impacts during creping. The cermet coating includes chromium carbides and tungsten carbides in a nickel based metal matrix. The cermet coating has a porosity of <2 volume % and a hardness of >1100 HV.sub.0.3.

A blade for creping a paper web from a dryer cylinder surface. The blade has a leading side and a front bevel surface to be impacted by the paper web. The leading side and the front bevel surface meet at a contact edge to contact the dryer cylinder. The front bevel surface has a 3D areal roughness, measured according to ISO 25178, of Sa>0.7 m and/or Sz>18 m and/or Sq>1.0 m.

The invention relates to a support plate of a doctor in a fiber web machine. The support plate (10) is designed to be removably fitted to a blade holder (16) and to support a doctor (15) in the blade holder (16). The support plate (10) includes sensor devices (18) for detecting that a drop through has accrued either upstream from the doctor or at the doctor. The invention also relates to a doctor assembly of a fiber web machine and a method in a doctor of a fiber web machine.

The invention relates to a support plate of a doctor in a fiber web machine. The support plate (10) is designed to be removably fitted to a blade holder (16) and to support a doctor (15) in the blade holder (16). The support plate (10) includes sensor devices (18) for detecting that a drop through has accrued either upstream from the doctor or at the doctor. The invention also relates to a doctor assembly of a fiber web machine and a method in a doctor of a fiber web machine.