The invention relates to a reel-up (1) for receiving and winding into a roll (5) a paper web (W) that arrives from a drying cylinder (2) in a paper making machine. The reel-up (1) comprises a rotatably mounted reel spool (4) onto which a paper web (W) can be wound to create a paper roll (5) of increasing diameter and an endless flexible belt (6) mounted for rotation along a predetermined path of travel such that the flexible belt (6) forms a loop. The flexible belt (6) is positioned adjacent to the reel spool (4) to engage the paper web (W) against the reel spool (4) during winding such that the flexible belt (6) is deflected from the predetermined path of travel when the paper roll (5) starts to build up on the reel spool (4). The flexible belt (6) is air permeable and at least one blow box (7, 8, 9) is arranged inside the loop of the flexible belt (6) such that an underpressure can be generated that draws the paper web (W) against the flexible belt (6). The at least one blow box (7, 8, 9) has at least one nozzle (10) through which air is blown out of the at least one blow box (7, 8, 9) and the nozzle is shaped as a slot. According to the invention, the at least one blow (7,8, 9) box faces the flexible belt (6) with an outer surface (11) which is convexly curved such that dust which has been sucked through the flexible belt (6) and lands on the at least one blow box (7, 8, 9) is helped by gravity to glide along the outer surface (11) of the blow box (7, 8, 9) and fall of the blow box (7, 8, 9).

The machine (1) comprises: an unwinding section (3) of parent reels (Ba, Bb) of web material (Na, Nb); a cutting station (13), comprising a plurality of cutting members (201, 203) to divide the web material (Na, Nb) into longitudinal strips (S); a plurality of winding stations (15); in each winding station (15), a guide arm (31) to guide the longitudinal strip (S), adjustable parallel to the rotation axis (C-C) of the winding mandrel (51). The cutting station (13) comprises sensor members (213, 214) to detect the position of the cutting members (201, 203). A control unit (216) is interfaced with the sensor members (213, 214) of the cutting station (13) and the positioning actuators (27), to position the guide arms (31) parallel to the rotation axis (C-C) of the respective winding mandrel (51) as a function of the position of the corresponding cutting member (201, 203).

A control system for a converting line has a sensor configured to sense a distance between the sensor and a surface of a roll of web material as the roll of web material is unwound from an unwinder and directed to the converting line. The controller is configured to: (i) determine a diameter measurement of the roll as the roll rotates based upon the sensor signals; (ii) store a plurality of data structures in a memory of a controller of a control system wherein the data structures comprise a plurality of data items associated together as the diameter measurements of the roll of the web material; (iii) process by a statistical regression analysis the data structures associated with the diameter; and (iv) generate signals for controlling the converting line based upon the processed diameter measurements.

Support pin for supporting reels of paper material, comprising an outer side (PX) and an inner side (PN), with the inner side (PN) that is adapted to be inserted into a reel (1) of paper material and with the outer side (PX) that remains on the outside of the same reel (1) when the inner side (PN) is inside the reel (1), said outer side (PX) being provided with a hooking portion (3) adapted to be engaged by means (CP) adapted to vertically move the pin (P). The outer side (PX) of the pin (P) is constituted by a shank (2) whose longitudinal axis coincides with the longitudinal axis (x-x) of the pin (P) and said hooking portion comprises an eyelet formed on the shank (2) and delimited by two parallel arms (30) that emerge radially from the shank (2) and are joined by a body (31) parallel to said longitudinal axis (x-x).

Device for handling paper reels, comprising a bridge crane (CP) with movable arms (BC) each of which is adapted to engage a pin (P) insertable into a corresponding side of a reel (1) and a platform (PB) adapted for supporting the reel (1). The device further comprises detection means adapted to detect load variations on said arms (BC) during insertion of the pins (P) inside the reel (1), and moving means adapted to achieve a relative movement between the reel (1) and the arms (BC) when the absolute value of a variation of the load detected by said detection means exceeds a predetermined limit up to bring said value below the predetermined limit.

The invention relates to a reel-up (2) for receiving and winding into a roll (3) a paper web (W) that arrives from a drying cylinder (17) in a paper making machine (1). The reel-up (2) comprises a rotatably mounted reel spool (4) onto which a paper web (W) can be wound to create a paper roll (3) of increasing diameter and an endless flexible belt (5) mounted for rotation along a predetermined path of travel such that the flexible belt (5) forms a loop. The flexible belt (5) is positioned adjacent to the reel spool (4) to engage the paper web (W) against the reel spool (4) during winding such that the flexible belt (5) is deflected from the predetermined path of travel. According to the invention, the endless flexible belt (5) comprises electrically conductive material such that static electricity in the flexible belt (5) is dissipated away from the flexible belt (5). The invention also relates to a paper making machine in which the inventive reel-up is used and to a method of winding a paper web.

Expandable pin for supporting reels of paper material, comprising an outer side (PX) and an inner side (PN), with the inner side (PN) that is adapted to be inserted into a reel (1) of paper material and with the outer side (PX) that remains on the outside of the same reel (1) when the inner side (PN) is inside the reel (1). An outer surface of said inner side (PN) is formed by more sectors (4), each of which is formed by a cylindrical surface portion with a free front part (40). The front parts (40) of said sectors (4) define a substantially circular shape with a diameter varying between a maximum value (4a) and a minimum value (4c). Each of said sectors (4) has a part pivoted on a respective hinge (42; 106) and is connected to moving means apt to determine its rotation around said hinge (42; 106) such that the sectors (4) define a cylindrical shape or a conical shape depending on their rotation around said hinge (42; 106).

A brake is provided for an idler roll (10) of a fiber web machine, in particular of a slitter-winder, which idler roll (10) has an outer shell surface (13). The brake (20) is located outside the outer shell surface (13) of the idler roll (10) in close vicinity of the idler roll (10) in a non-contacting position. The brake (20) has a permanent magnet (25), which is configured to be moved from non-braking position to a braking position and vice versa by an actuator or cylinder (35, 45).

Described herein are methods and systems for reducing the tail on a parent roll. The system may comprise a web tail extending from a parent roll supported by an unwind stand. The system may further comprise one or more nozzles positioned below the web tail and configured to facilitate the rewinding of the web tail about the parent roll. The web tail may be rewound about the parent roll in a direction opposite to that which the web was initially wound about the parent roll. As a result, the length of the web tail extending from the parent roll may be reduced and is less likely to lengthen as the parent roll is ejected from the unwind stand.

A product marking is disclosed in connection with a narrow roll. The narrow rolls are provided with a product marking in a first information adding step, the product marking including at least general information. In a second information adding step, the product marking in at least some of the narrow rolls is provided with customer information. After the second information adding step all the narrow rolls have a product marking comprising the customer information.