The invention relates to a method of rerolling a rolled-up material web, in particular a rolled-up material web of an elastic material on a rerolling device. Furthermore, the invention relates to a rerolling device for performing the method. The inventive method of rerolling a rolled-up material web of an elastic material on a rerolling device having an-uncoiler and a recoiler, with the material web being rerolled from a large roll rolled up on the uncoiler and having a diameter D to a section roll to be rolled up on the recoiler, and with the uncoiler and/or the recoiler having an actuator, is characterized in that during rerolling, the diameter D of the large roll on the uncoiler and/or the diameter d of the section roll on the recoiler are continuously determined and the performance of an actuator is continuously adjusted by means of this determined parameter. The terms “continuously determined” and “continuously adjusted” are not only to be understood here as an actually continuous, i. e. ongoing, determining or adjusting process, but also as one that takes place in discrete time intervals, the determining taking place multiple times during the rerolling process.

The invention relates to a method of rerolling a rolled-up material web, in particular a rolled-up material web of an elastic material on a rerolling device. Furthermore, the invention relates to a rerolling device for performing the method. The inventive method of rerolling a rolled-up material web of an elastic material on a rerolling device having an-uncoiler and a recoiler, with the material web being rerolled from a large roll rolled up on the uncoiler and having a diameter D to a section roll to be rolled up on the recoiler, and with the uncoiler and/or the recoiler having an actuator, is characterized in that during rerolling, the diameter D of the large roll on the uncoiler and/or the diameter d of the section roll on the recoiler are continuously determined and the performance of an actuator is continuously adjusted by means of this determined parameter. The terms “continuously determined” and “continuously adjusted” are not only to be understood here as an actually continuous, i. e. ongoing, determining or adjusting process, but also as one that takes place in discrete time intervals, the determining taking place multiple times during the rerolling process.

A winding device includes a winding portion that winds a continuous medium, a friction roller that contacts the continuous medium while the continuous medium is being fed to the winding portion and that applies friction resistance to the continuous medium, and a roller driving portion that causes the friction roller to rotate in a direction in which the continuous medium is fed, in which the roller driving portion includes a roller gear train that transmits rotation of a feed motor, which is input via a winding-portion gear train, to the friction roller.

A winding device includes a winding portion that winds a continuous medium, a friction roller that contacts the continuous medium while the continuous medium is being fed to the winding portion and that applies friction resistance to the continuous medium, and a roller driving portion that causes the friction roller to rotate in a direction in which the continuous medium is fed, in which the roller driving portion includes a roller gear train that transmits rotation of a feed motor, which is input via a winding-portion gear train, to the friction roller.

A friction shaft for a slitter has winding tubes disposed on an outer surface thereof to roll unit materials formed by cutting a raw material such as various kinds of paper, fabric, or film with predetermined intervals includes a first rotary shaft, tubes, brake pads, a second rotary shaft, pressing members, first rotary tubes, second rotary tubes, first and second bearings, first elastic members, guide members, second elastic members, and lugs for clamping.

A friction shaft for a slitter has winding tubes disposed on an outer surface thereof to roll unit materials formed by cutting a raw material such as various kinds of paper, fabric, or film with predetermined intervals includes a first rotary shaft, tubes, brake pads, a second rotary shaft, pressing members, first rotary tubes, second rotary tubes, first and second bearings, first elastic members, guide members, second elastic members, and lugs for clamping.

Paper converting plant including a rewinder adapted to produce paper logs and having an inlet for feeding a paper web, a winding station where the logs are formed and an exit station for unloading the finished logs. The rewinder has walls delimiting a chamber inside which the logs are formed, and an air suction channel at a lower part of chamber. The suction channel exerts a suction causing the formation of an air flow directed from the top to the bottom inside the chamber. The chamber includes two semi-chambers communicating with the air suction channel such that a vertical air flow directed downwards is generated in each of them, the chamber being provided with a manner for regulating the vertical air flows providing vertically oriented identical air flow rates in the semi- chambers.

Paper converting plant including a rewinder adapted to produce paper logs and having an inlet for feeding a paper web, a winding station where the logs are formed and an exit station for unloading the finished logs. The rewinder has walls delimiting a chamber inside which the logs are formed, and an air suction channel at a lower part of chamber. The suction channel exerts a suction causing the formation of an air flow directed from the top to the bottom inside the chamber. The chamber includes two semi-chambers communicating with the air suction channel such that a vertical air flow directed downwards is generated in each of them, the chamber being provided with a manner for regulating the vertical air flows providing vertically oriented identical air flow rates in the semi- chambers.

A coreless roll of an absorbent sheet product, such as napkins, toilet paper, towels etc., is provided made of a spirally wound continuous web of absorbent material having a first end and a second end, wherein a coating composition comprising a specific polymer and a binding agent in a weight ratio polymer to binding agent of at least 92:8 is coated onto the second end. The coreless roll has excellent resistance to collapsing, as well as excellent flexibility and elasticity. Moreover, the coreless roll has excellent disintegrability in water and can be used up over its whole length. A process for the manufacture of the coreless roll is also provided.

A coreless roll of an absorbent sheet product, such as napkins, toilet paper, towels etc., is provided made of a spirally wound continuous web of absorbent material having a first end and a second end, wherein a coating composition comprising a specific polymer and a binding agent in a weight ratio polymer to binding agent of at least 92:8 is coated onto the second end. The coreless roll has excellent resistance to collapsing, as well as excellent flexibility and elasticity. Moreover, the coreless roll has excellent disintegrability in water and can be used up over its whole length. A process for the manufacture of the coreless roll is also provided.