A variable roll cage machine and process to roll up material, like high expansion force material. The machine includes a roll chamber to receive the material. The roll chamber has a longitudinal central axis and a plurality of rollers located around a circumference of the roll chamber. The plurality of rollers include two roll groups of at least two rollers in each roll group. At least one of the rollers in each roll group is movable toward the longitudinal central axis independent of at least one other roller in the roll group. A material infeed gap is in the circumference of the roll chamber located between the two roll groups and spaced from the at least one of the rollers in each roll group that is movable.

A system and method for rolling up a flexible sheet includes a frame; a friction element mounted on the frame and having an endless friction outer surface with a sheet-engaging portion to engage an end of the sheet; and a drive connected to the friction element to move the endless friction outer surface such that the sheet-engaging portions thereof move upwardly to engage the end of the flexible sheet and lift up and roll the end of the flexible sheet over on itself to form a roll. The method for rolling up the flexible sheet includes rotating the friction element and engaging the end of the flexible sheet with the endless friction outer surface such that the sheet-engaging portions move upwardly to engage the end of the flexible sheet and curl the end of the flexible sheet upwardly back over on itself to form a roll.

A system and method for rolling up a flexible sheet includes a frame; a friction element mounted on the frame and having an endless friction outer surface with a sheet-engaging portion to engage an end of the sheet; and a drive connected to the friction element to move the endless friction outer surface such that the sheet-engaging portions thereof move upwardly to engage the end of the flexible sheet and lift up and roll the end of the flexible sheet over on itself to form a roll. The method for rolling up the flexible sheet includes rotating the friction element and engaging the end of the flexible sheet with the endless friction outer surface such that the sheet-engaging portions move upwardly to engage the end of the flexible sheet and curl the end of the flexible sheet upwardly back over on itself to form a roll.

The disclosure relates to a method for producing a circumferential packaging for a paper roll. The paper roll has a wound paper web and two opposing end faces and a circumferential surface that connected the end faces to each other. The method includes the following steps: applying a protective material in liquid form to an end section of the paper web by at least one application unit, the protective material being applied to one of two sides of the end section of the paper web, winding up the end section of the paper web, so that the end section forms at least one outer layer of the paper roll, and curing the protective material, resulting in a protective layer that covers the circumferential surface.

The disclosure relates to a method for producing a circumferential packaging for a paper roll. The paper roll has a wound paper web and two opposing end faces and a circumferential surface that connected the end faces to each other. The method includes the following steps: applying a protective material in liquid form to an end section of the paper web by at least one application unit, the protective material being applied to one of two sides of the end section of the paper web, winding up the end section of the paper web, so that the end section forms at least one outer layer of the paper roll, and curing the protective material, resulting in a protective layer that covers the circumferential surface.

Rewinder for making paper logs, including a winding station with a first winding roller and a second winding roller delimiting a nip and a third winding roller downstream of the other rollers. The rewinder includes optical elements for detecting, at a predetermined time, an actual position of each log in said winding station and an electronic unit connected to the optical elements and programmed to compare the actual position with a theoretical position of the log at the time, the electronic unit being connected to at least one motor driving the rollers and programmed to modify the speed of the at least one motor when a deviation between the actual and theoretical positions exceeds a pre-established value, the electronic unit being also programmed to operate said optical elements at the time.

Rewinder for making paper logs, including a winding station with a first winding roller and a second winding roller delimiting a nip and a third winding roller downstream of the other rollers. The rewinder includes optical elements for detecting, at a predetermined time, an actual position of each log in said winding station and an electronic unit connected to the optical elements and programmed to compare the actual position with a theoretical position of the log at the time, the electronic unit being connected to at least one motor driving the rollers and programmed to modify the speed of the at least one motor when a deviation between the actual and theoretical positions exceeds a pre-established value, the electronic unit being also programmed to operate said optical elements at the time.

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.

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.