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公开(公告)号：US20240400329A1
公开(公告)日：2024-12-05
申请号：US18677231
申请日：2024-05-29
Applicant: Valmet Technologies Oy
Inventor： Jaakko HAAPANEN , Mikko RÄMÄ
Abstract: The invention relates to a method and an unwinding section for unwinding a fiber web from a parent roll, which unwinding section comprises at least one unwinder for unwinding a fiber web from a parent roll and a joining device configured to join a trailing end of a running-out parent roll to a beginning end of a next, new parent roll to be unwound in a parent roll change. The unwinding section comprises a broke handling device configured to handle broke. The unwinding section comprises a tensioning device located between the joining and the broke handling, and the tensioning device is configured to tension and straighten the fiber web to be joined between the tensioning device and the joining device before joining of the end of the fiber web from the running-out parent roll and the end of the fiber web from the next parent roll to be unwound.
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公开(公告)号：US20240262646A1
公开(公告)日：2024-08-08
申请号：US18605985
申请日：2024-03-15
Applicant: Valmet Technologies Oy
Inventor： Arto LESKINEN , Mikko RÄMÄ
CPC classification number: B65H19/1852 , B65H19/1857 , B65H21/00 , B65H2301/46
Abstract: A joint for joining ends of at least two fiber webs together, the joint being formed of at least one cut provided to penetrate through the ends of the fiber webs in an overlapping position, which cut has at least one side part and from the side part extending at least one substantially straight part and which cut, which forms at least one flap, being configured to remain attached to the fiber webs by at least one folding line substantially aligned with the direction of the movement of the fiber webs.
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公开(公告)号：US20220396445A1
公开(公告)日：2022-12-15
申请号：US17838193
申请日：2022-06-11
Applicant: Valmet Technologies Oy
Inventor： Arto LESKINEN , Mikko RÄMÄ
Abstract: A joint and device for joining ends of at least two fiber webs together, the joint being formed of at least one cut provided to penetrate through the ends of the fiber webs in an overlapping position, which cut has at least one side part and from the side part extending at least one substantially straight part and which cut, which forms at least one flap, being configured to remain attached to the fiber webs by at least one folding line substantially aligned with the direction of the movement of the fiber webs. The device comprises a tool with a cutting edge and a counter element with a groove and located on the opposite side of the fiber webs, and the tool protrudes into the groove. The groove has a greater cross-sectional area than the cross-sectional area of the tool such that a loose and spacey fitting is provided.
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