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1. WO2014175808 - A REEL-UP FOR WINDING A PAPER WEB INTO A ROLL AND A METHOD OF WINDING A PAPER WEB TO FORM A ROLL

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

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) comprising: 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) being 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 when the paper roll (3) starts to build up on the reel spool (4), characterized in that the endless flexible belt (5) is either an air permeable woven fabric with a plurality of warp yarns (32) and a plurality of weft yarns (33) interwoven with the plurality of warp yarns (32) and wherein at least some of the yarns (32, 33) are electrically conductive such that static electricity in the flexible belt (5) is dissipated away from the flexible belt (5) or the flexible belt is an air permeable spiral link belt which comprises electrically conductive elements (36) that have been inserted into the spiral link belt and extend in a cross-machine direction such that static electricity in the flexible belt (5) is dissipated away from the flexible belt.

A reel-up according to claim 1, wherein the flexible belt (5) is an air permeable woven fabric with a plurality of warp yarns (32) and a plurality of weft yarns (33) interwoven with the plurality of warp yarns (32) and wherein at least some of the weft yarns (33) are electrically conductive.

A reel-up according to claim 1, wherein the flexible belt (5) is an air permeable spiral link belt which comprises electrically conductive elements (36) that have been inserted into the spiral link belt and extend in a cross-machine direction.

A reel-up according to any of claims 1 - 3, wherein the reel-up (2) further comprises: a deflection sensor (6) mounted adjacent to the flexible belt (5) and being arranged to measure the amount of deflection of the flexible belt (5) from the predetermined path of travel; an actuator (7) for positioning the reel spool (4) and the flexible belt (5) relative to each other to vary the amount of deflection of the flexible belt (5); and a controller (8) connected to the

deflection sensor (6) and the actuator (7) for controlling the amount of deflection of the flexible belt (5) as the paper roll (3) increases in diameter.

A reel-up according to any of claims 1 - 4, in which the reel-up (2) further comprises at least one source of underpressure (10, 11, 12) located inside the loop of the flexible belt (5).

A paper making machine for making tissue paper and which comprises a Yankee drying cylinder (17) and a doctor blade (27) arranged to crepe a paper web from the surface of the Yankee drying cylinder (17), and wherein, downstream of the Yankee drying cylinder (17), the paper making machine further comprises a reel-up (2) according to any of claims 1 - 5.

A method of winding a paper web (W) to form a roll (3), the method comprising the steps of: engaging an endless flexible belt (5) against a reel spool (4); moving the endless flexible belt (5) along a predetermined path of travel; rotating the reel spool (4) such that the surface of the reel spool (4) moves together with the flexible belt (5) and forms a nip with the flexible belt (5); and advancing the paper web (W) into the nip and directing the web (W) around the reel spool (4) to form a roll (3) of increasing diameter, characterized in that the endless flexible belt (5) is either an air permeable woven fabric with a plurality of warp yarns (32) and a plurality of weft yarns (33) interwoven with the plurality of warp yarns (32) and wherein at least some of the yarns (32, 33) are electrically conductive such that static electricity in the flexible belt (5) is dissipated away from the flexible belt (5) or the flexible belt is an air permeable spiral link belt which comprises electrically conductive elements (36) that have been inserted into the spiral link belt and extend in a cross-machine direction such that static electricity in the flexible belt (5) is dissipated away from the flexible belt.

A method according to claim 7, wherein the paper web (W) is first creped from a Yankee drying cylinder (17) and subsequently conveyed to the endless flexible belt (5) to be wound to a roll (3), and wherein the paper web (W) that arrives to the reel-up (2) preferably has a moisture content of 1 % by weight - 5 % by weight.