A method for creping paper includes applying an adhesive composition to an outer surface of a creping cylinder (Yankee cylinder) to form an adhesive coating, contacting paper with the adhesive coating, removing the paper and adhesive coating from the creping cylinder, and determining a quality of the adhesive coating. Determining the quality of the adhesive coating may include measuring a degree of cross-linking of the adhesive polymer, a concentration of the adhesive polymer in the adhesive coating, a water content of the adhesive coating, an ash content of the adhesive coating, or combinations thereof. Determining the quality of the adhesive coating may also include determining a thickness of the adhesive coating by measuring light absorbed by the coating and calculating the thickness using Beer's Law. Systems and apparatuses for determining the quality of the adhesive coating and for creping paper are also disclosed.

A used paper recycling apparatus includes a defibration unit that defibrates used paper to generate a defibrated product, an accumulation unit that accumulates the defibrated product to form a web, a sheet forming unit that forms a sheet by applying at least one of heating and compression to the web, a cutting unit that cuts the sheet into a predetermined length, and an optical sensor that is provided at an exit of the sheet forming unit and that measures density information of the sheet.

A used paper recycling apparatus includes a defibration unit that defibrates used paper to generate a defibrated product, an accumulation unit that accumulates the defibrated product to form a web, a sheet forming unit that forms a sheet by applying at least one of heating and compression to the web, a cutting unit that cuts the sheet into a predetermined length, and an optical sensor that is provided at an exit of the sheet forming unit and that measures density information of the sheet.

An accumulating unit that discharges fibers by rotating a drum unit in which a plurality of openings are formed, a second web forming unit that forms a second web by operating a mesh belt, a sheet forming unit that forms a sheet from the second web, and a control unit that performs a start control for operating the accumulating unit and the second web forming unit from the stop state are included. In a case where the start control is performed from a state where the fibers are present in the drum unit, the control unit adjusts a thickness of the second web by controlling at least one of a timing at which rotation of the drum unit is initiated, a rotational speed of the drum unit, a timing at which movement of the mesh belt is initiated, and a movement speed of the mesh belt.

An accumulating unit that discharges fibers by rotating a drum unit in which a plurality of openings are formed, a second web forming unit that forms a second web by operating a mesh belt, a sheet forming unit that forms a sheet from the second web, and a control unit that performs a start control for operating the accumulating unit and the second web forming unit from the stop state are included. In a case where the start control is performed from a state where the fibers are present in the drum unit, the control unit adjusts a thickness of the second web by controlling at least one of a timing at which rotation of the drum unit is initiated, a rotational speed of the drum unit, a timing at which movement of the mesh belt is initiated, and a movement speed of the mesh belt.

A paper producing apparatus includes: a sieve portion having a plurality of openings; a web forming portion having a deposition surface on which a material passing through the openings and containing fibers is deposited, the web forming portion forming a web on the deposition surface; a sheet forming portion that processes the web into a sheet; and a material supply pipe through which transport airflow containing the material is supplied to an inside of the sieve portion.

A paper producing apparatus includes: a sieve portion having a plurality of openings; a web forming portion having a deposition surface on which a material passing through the openings and containing fibers is deposited, the web forming portion forming a web on the deposition surface; a sheet forming portion that processes the web into a sheet; and a material supply pipe through which transport airflow containing the material is supplied to an inside of the sieve portion.

A method for creping paper includes applying an adhesive composition to an outer surface of a creping cylinder (Yankee cylinder) to form an adhesive coating, contacting paper with the adhesive coating, removing the paper and adhesive coating from the creping cylinder, and determining a quality of the adhesive coating. Determining the quality of the adhesive coating may include measuring a degree of cross-linking of the adhesive polymer, a concentration of the adhesive polymer in the adhesive coating, a water content of the adhesive coating, an ash content of the adhesive coating, or combinations thereof. Determining the quality of the adhesive coating may also include determining a thickness of the adhesive coating by measuring light absorbed by the coating and calculating the thickness using Beer's Law. Systems and apparatuses for determining the quality of the adhesive coating and for creping paper are also disclosed.

A method for creping paper includes applying an adhesive composition to an outer surface of a creping cylinder (Yankee cylinder) to form an adhesive coating, contacting paper with the adhesive coating, removing the paper and adhesive coating from the creping cylinder, and determining a quality of the adhesive coating. Determining the quality of the adhesive coating may include measuring a degree of cross-linking of the adhesive polymer, a concentration of the adhesive polymer in the adhesive coating, a water content of the adhesive coating, an ash content of the adhesive coating, or combinations thereof. Determining the quality of the adhesive coating may also include determining a thickness of the adhesive coating by measuring light absorbed by the coating and calculating the thickness using Beer's Law. Systems and apparatuses for determining the quality of the adhesive coating and for creping paper are also disclosed.

Device for smoothing a paper or board web (9) with at least one nip (6) formed between two rolls (3, 4), wherein at least one of the rolls (3) for controlling a thickness transverse profile of the paper or board web (9) in the web transverse direction is a deflection-adjustable and zone-controlled roll (3) for setting a line load distribution over the roll width which can be selected in the at least one nip (6), wherein the at least one nip (6) is provided for smoothing the thickness transverse profile of the paper or board web (9) by means of an adjustable line load profile and simultaneously introducing a treatment medium (2) into the paper or board web (9), for which purpose at least one coater (1) having a delivery nozzle (8) for applying application medium (2), in particular starch, is arranged in such a way that the application of the treatment medium (2) to at least one of the two rolls (3, 4) of the nip (6) is provided and is designed for indirect application of the treatment medium (2) to at least one side of the running paper or board web (9) and the at least one coater (1) has at least one delivery nozzle (8) with a device (13) for cross-profile adjustment of a volume flow of the treatment medium (2) which can be adjusted zone by zone over the web width.