A method of producing a paper product by forming a paper web on a paper machine, the web including a plurality of sections, analyzing the web, marking the web, winding the web to form a parent roll after the web has been inspected and marked, assigning an action score to each section of the web, at least one action score having an action value, unwinding a web from a parent roll, reading at least one of a plurality of marks with a mark reading unit, obtaining the action score associated with a second one of the marks, calculating a distance between a mark read by the reading unit and the second one of the marks, changing at least one operational parameter of a converting line based upon the action score of the second of the marks when the distance is less than a threshold, and converting the paper web.

A monitoring system for monitoring the conditions of a band circulating in a paper-making machine, comprises a guide extending substantially along an axis; and a monitoring apparatus movable along the guide and comprising at least one measuring device configured to measure at least one parameter indicative of the conditions of the band; the apparatus is a self-propelled motorized apparatus, provided with a motor and at least one driving member operated by the motor and which engages at least one corresponding surface of the guide to move the apparatus along the guide.

A sheet manufacturing apparatus includes a drum unit having a plurality of openings, a web forming unit that has a deposition surface, on which material containing fibers that has passed through the openings is deposited, and forms a second web on the deposition surface, a sheet forming unit that processes the second web and forms a sheet, and a control unit that controls a basis weight of the second web deposited on the deposition surface in a direction crossing a transport direction of the second web.

The sheet manufacturing apparatus includes a fibrillating unit that fibrillates a raw material including fibers in a gas, an additive supply unit that supplies an additive, a mixing unit including a first rotating unit that mixes a fibrillated matter fibrillated by the fibrillating unit and the additive supplied by the additive supply unit, a depositing unit that deposits a mixture mixed by the mixing unit, a web forming unit including a mesh belt that transports a deposited material deposited by the depositing unit and a suction mechanism that sucks the deposited material to the mesh belt, and a control unit that changes granularity of a surface of the sheet by controlling at least one of a supply amount per unit time from the additive supply unit, a rotation velocity of the first rotating unit of the mixing unit, and a suction force of the suction mechanism.

The object of the invention is an apparatus for measuring dewatering in the wet end of a paper machine. What is essential in the invention is that the apparatus comprises a measuring receptacle (15) functioning at normal air pressure, in which receptacle the amount of the water (7) of the negatively-pressurized dewatering points of the paper machine is measured by means of a pressure-difference transmitter (20) and of a measuring weir (8).

The object of the invention is an apparatus and a method for measuring dewatering in the wet end of a paper machine. What is essential in the invention is that the measuring system (26) comprises an essentially horizontal inlet pipe (10) on the machine level (11), which pipe is installed in the measuring receptacle (27), and in that the separation of air (22) is performed in an expanded pipe section (15) made in the inlet pipe (10) and in the outlet pipe (16) connected to it. A weir plate is installed in the measuring receptacle (27) of the measuring system (26), the weir plate functioning as a measuring weir (8) for measuring the amount of the dewatering flow, and from a pressure difference transmitter (20) installed on one side, which transmitter measures the height of the water surface produced by the measuring weir (8) for measuring the amount of water (7).

A paper web includes a surface having a plurality of sections. At least one section of the plurality of sections has a plurality of positions. The plurality of positions each has an equal length and is obtained by subdividing the at least one section. The paper web also includes ink applied to the surface of the paper web at some of the plurality of positions.

A method of controlling a converting line that produces a paper product. The method includes unwinding a paper web from a parent roll on a converting line having a plurality of operational parameters. The paper web includes a plurality of sections and a plurality of marks, with at least one mark assigned to each of the plurality of sections and each mark associated with a paper rating. At least one of the plurality of marks is read with a mark reading unit. The paper rating associated with the at least one mark read by the reading unit is obtained. At least one operational parameter of the converting line based upon the obtained paper rating is changed. The paper web is converted into a paper product.

A method for producing an air-laid product or a non-woven product from a starting material includes: comminuting starting material into a comminuted material in at least one comminution line by at least one comminuting device; feeding the comminuted material into at least one material buffer; removing the comminuted material from the at least one material buffer; metering the comminuted material by at least one metering device; supplying the comminuted material to at least one processing line with at least one defibration system in which the comminuted material is defiberized into a defiberized material; and feeding the defiberized material into a production machine and processing the defiberized material into an air-laid product or a non-woven fabric. The at least one metering device is controlled in such a way that a continuous mass flow of defiberized material is supplied to the production machine.

A method for monitoring a wear structure including at least one wear element in a machine for generating or processing a fibrous material web, includes providing a time at which the wear element became operational, providing a time at which a defined first wear level of the wear element was reached, providing at least one further characteristic variable, and predicting a remaining operating time of the wear element from the knowledge of the times, in particular from a time difference between the times, as well as from the at least one further characteristic variable, by using a computer system. A device for carrying out the method is also provided.