Metso Paper Inc.

Valmet Corporation

Heikki Toivanen

Ilkka Rata

Ilkka Eskelinen

Harri Ruotsalainen

Jukka Samppala

Kari Holopainen

Juhani Vestola

Juha Isomets&auml;

Kari Niemi

Sami Kuparinen

Seppo Parviainen

Timo S Lintula

Mika H&auml;kkinen

A doctor unit in a paper machine includes a blade carrier having a blade holder fitted to the blade carrier. A doctor blade is mountable in the blade holder to doctor a roll or similar moving surface. The blade holder and/or doctor blade include one or more sensors installed inside the construction or on its surface. The sensors are arranged to measure the wear of and/or stress in the blade holder and/or doctor blade.

Doctor unit in a paper machine

The invention relates to an apparatus comprising a holder ( ) for a doctor blade and a blade ( ) to be fitted in the holder for use in a paper or board machine. The holder ( ) and/or the blade ( ) comprises a composite material of whose surface or on a part of whose surface a ceramic coating ( ) has been made.

Doctor blade and blade holder comprising composite material and ceramic coating

A reeling device ( ), has a support base ( ), a support arm ( ), and a shaft ( ) mounted on the support arm ( ). One shaft end has a boss ( ) and the other end has a revolving frame ( ). Mounted to the device is a transit case ( ), within which the used doctor blades ( ) of a paper/cardboard machine are reeled on a roll. Raw material is supplied to a blade production plant, where the blades are produced, then transported to a paper/cardboard plant and stored in the plant prior to being mounted in connection with paper/cardboard machine rolls, where their condition is monitored during use. Used doctor blades are removed from the machine, packed in storable form with the reeling device, and are stored in the paper/cardboard plant. The packed used blades are transported away from the paper/cardboard plant and delivered into recycling, reuse or end use.

Equipment and method in handling of doctor blades for a paper/cardboard machine

The invention relates to band-like doctor blade assembly, a doctor blade and a method in the use of the doctor blade. The doctor blade assembly includes continuous and substantially infinite doctor blade that is placed in a reel, the doctor blade is then fed into a blade holder. The blade holder includes locking devices in its connection for locking the doctor blade in the blade holder. The continuous and substantially infinite doctor blade has a plurality of edge notches formed along an edge thereof and the doctor blade is fed over a length substantially equal to the distance between the edge notches, while the notches are placed, during the operation of the doctor blade, at both ends of the blade holder and permit bending of the continuous band-like doctor blade.

Equipment and method for replacing a band-like doctor blade

A beam structure ( ) made of a composite for a pulp machine/paper machine/board machine or for a paper/board finishing device. The beam ( ) is formed of a first curved part ( ) and of a second straight part ( ) joined thereto, to which second straight part ( ) a doctoring, coating or measurement apparatus ( ) is attached.

Beam structure in a pulp machine/paper machine/board machine or in a paper/board finishing device

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Jyväskylä, Finland

Heikki Toivanen