Valmet Technologies, Inc.

Metso Paper Inc.

Valmet Technologies Oy

Kenneth Åkerlund

Jaakko Haapanen

Marko Jorkama

Harri Lindberg

Jari Paanasalo

Markku Järvensivu

Mikko Veijalainen

Kimmo Penttilä

Marko Korpinen

Antti Kylä-Rekola

Timo Virtanen

This invention relates to a method of controlling the operation of a winder in which method while forming at least one fiber web roll the fiber web is brought on the web roll via a nip formed by a first support drum and the web roll, which first support drum is driven by a first drive assembly () applying controllable torque to the drum and the winding force is applied to the web roll by a second drive assembly (). In the method the second drive assembly () is controlled based on the indicative speed difference of the second drive assembly () and setting a friction coefficient for determination of maximum winding force.

Method of controlling operation of a winder for a fiber web

A trailing end (') of a web in a web roll () is secured to a surface of the web roll in a slitter-winder () by attachment articles () which extend over a trailing end of the web on the roll surface. Each attachment article has an adhesive surface positioned on a path of movement of the web roll, facing toward the roll, and, while the roll is moved, it is attached on the surface of the web roll. An arrangement () for securing a trailing end of a web to the roll in a slitter-winder () has a roll handling system () to move the rolls () via a path, and an adhesive article distribution system () positioned to attachment the article, in which the two systems co-operate so that, as the rolls are moved, the attachment article is attached on the surface of the web roll.

Method of and an arrangement for securing a trailing end of a web in a web roll to a surface of the roll

A set changing device of a slitter-winder has a pusher device for pushing completed wound fiber web rolls () of partial webs cut with a slitter-winder and carried by carrier means () forward from the winding-up section (). The pusher device has at least two press rolls. The position of at least one of the press rolls () with respect to the body () of the pusher device () is arranged to change during pushing.

Set changing device of a slitter-winder

A method of adhesive-free threading of a fibrous material web for winding around a winding body includes the steps of diverting the fibrous material web in the circumferential direction of the winding body, guiding the fibrous material web with its unfolded leading edge ahead in the direction of a nip formed between the winding body and a drum and catching the leading edge of the fibrous material web by interaction with the fibrous material web and/or the winding body. An apparatus for adhesive-free threading of a fibrous material web for winding around a winding body has a diverting device for diverting the fibrous material web in the circumferential direction of the winding body and a mechanical guide for guiding the fibrous material web with its unfolded leading edge ahead in the direction of a nip formed between the winding body and a drum.

Method and apparatus for threading a fibrous material web in a winder

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Helsinki, Finland

Kenneth Åkerlund