A tissue machine (1) has a Yankee (3) and a shoe roll (4) that forms a nip with the Yankee (3). The nip has a maximum extension from an entry point (7) to an exit point (8). A flexible belt (9) forms an outer circumference of the roll (4). A fabric (10) carries a fibrous web (W) to the nip and passes through the nip with the web. The fabric (10) reaches the circumference of the roll (4) at a first contact point (11) and wraps the roll (4) from the first contact point to the nip. A mechanical support (12) inside the belt (9) supports the belt (9) between the first contact point (11) and the nip. The fabric (10) wraps the roll (4) from the first contact point (11) by more than 80°. The invention also relates to a method of operating the machine.

There is provided a method of producing a kraft paper having a density measured according to ISO 534:2011 of 630-870 kg/m.sup.3 and a strain at break measured according to SS-ISO 1924-3:2011 in the machine direction (MD) of 1.0-8.9%, comprising a step of calendering a paper web at a dry content of 55-79%, wherein the line load of the calendering step is 8-90 kN/m, such as 10-70 kN/m, such as 12-50 kN/m, such as 15-40 kN/m. Further a method of producing a porous sack paper as well as a new kraft paper qualities are also provided.

A method for treating a pulp web in a paper or tissue machine with an extended-nip press unit. This extended-nip press unit includes a shoe press roll with a revolving press belt and a backing roll, where the pulp web is dewatered in the extended press nip between the backing roll and the press belt and where the pulp web is carried on the revolving press belt of the press roll after the extended press nip to a transfer fabric that receives the pulp web. The transfer fabric is guided over a stationary transfer device in the transfer area. A corresponding device for treating the pulp web.

A machine for dewatering and drying a paper, cardboard or other fibrous web, to which machine a fibrous stock suspension is fed which is formed at least partially from waste paper. The machine includes at least two press nips which are formed in each case by two press rolls, wherein a fibrous web runs through first press nip with a water absorbing dewatering belt on both sides. The fibrous web then runs through a second press nip with at least one other dewatering belt and a smooth impermeable transfer belt on both sides. A transfer belt transfers the fibrous web after second press nip to a belt in a downstream machine unit, e.g. dryer group. The dryer group allows the fibrous web to be guided in a serpentine manner alternatively over heated dryer cylinders and vacuum equipped guide rolls.

A forming section, commonly called wet part, of a fourdrinier machine includes a rotatable breast roll, a rotatable couch roll, a forming mesh disposed between said breast roll and said couch roll, wherein said forming mesh is tangent to a lower portion of said couch roll, a fabric mesh which is tangent to said couch roll, wherein the tangent point of said fabric mesh and said couch roll coincides with or is located front of the tangent point of said forming net and said couch roll, wherein said fabric mesh and said forming net are attached to part of the outer surface of said couch roll in an inner and outer manner, a dewatering unit disposed on the rear surface of said forming mesh, a headbox disposed above said breast roll for flowing pulp slurry to said forming mesh and a press roll disposed against on said couch roll to form a pressing zone between said press roll and said couch roll so as to press and dewater said wet fiber web formed on said forming mesh on the surface of said fabric mesh.

The present invention relates to a crescent former for producing tissue paper, the former comprising a forming section (A), a press section (B) and a drying section (C), wherein the crescent former further comprises a felt fabric (41) for carrying the stock from the forming nip (15) of the forming section (A) to the press nip (22) of the press section (B), and the felt fabric (41) being configured to carry the stock to the press nip (22) where the stock is transferred to the drying section (C), wherein further the felt fabric (41) is configured to be returned from the press nip (22) to the forming nip (15) in a return section (D) such that the felt fabric (41) forms an endless loop, wherein the return section (D) comprises a cleaning station (42), of which at least a part is arranged in a negative machine direction (−MD) in relation to a center line (R) of the forming roll (12).

The present invention relates to a crescent former for producing tissue paper, the former comprising a forming section (A), a press section (B) and a drying section (C), wherein the crescent former further comprises a felt fabric (41) for carrying the stock from the forming nip (15) of the forming section (A) to the press nip (22) of the press section (B), and the felt fabric (41) being configured to carry the stock to the press nip (22) where the stock is transferred to the drying section (C), wherein further the felt fabric (41) is configured to be returned from the press nip (22) to the forming nip (15) in a return section (D) such that the felt fabric (41) forms an endless loop, wherein the return section (D) comprises a cleaning station (42), of which at least a part is arranged in a negative machine direction (−MD) in relation to a center line (R) of the forming roll (12).

The present invention relates to a method for dewatering a web comprising microfibrillated cellulose, wherein the method comprises the steps of: providing a suspension comprising between 50 weight-% to 100 weight-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension on a support wherein said web has a dry content of 1-25% by weight, applying a dewatering felt into direct contact with the fibrous web, conducting said fibrous web, arranged between said dewatering felt and said substrate, through a pressing equipment. The invention further relates to a film produced from said method.

A drive arrangement comprising a roll with a roll bearing, a bearing housing and a motor, wherein the bearing housing of the roll bearing is connected to a frame or a foundation and a drive torque of the motor can be transmitted to the roll. The motor is connected to the bearing housing and a reaction torque of the motor can be transmitted into the bearing housing. This allows avoidance of mechanical stresses introduced into the roll with good accessibility of the rolls.

A drive arrangement comprising a roll with a roll bearing, a bearing housing and a motor, wherein the bearing housing of the roll bearing is connected to a frame or a foundation and a drive torque of the motor can be transmitted to the roll. The motor is connected to the bearing housing and a reaction torque of the motor can be transmitted into the bearing housing. This allows avoidance of mechanical stresses introduced into the roll with good accessibility of the rolls.