Metso Paper Inc.

Valmet Technologies, Inc.

Valmet Technologies Oy

Timo Nurmiainen

Mika Viljanmaa

Juha Lipponen

Seppo Luomi

Heikki Vatanen

Jari Ilomäki

Jukka Koskinen

Markku Grasten

Ilpo Honkanen

Kai Aalto

An arrangement in a curtain coater for starting and stopping coating of a web, having a reservoir and a connected surface extending over the web toward the curtain to collect the coating as the coater moves over the web to start coating the web. A cover plate that swing around a cross-direction shaft connected to the cover plate. In one embodiment the shaft also moves in the machine direction. The cover plate is used to protect an leading edge of the collecting surface from being covered with coating and pivots to be cleaned with fluid which may be supply from the shaft. The cover plate is arranged so the fluid drain off the cover plate onto the collecting surface or reservoir. When clean, the cover plate is repositioned to protect an leading edge of the collecting surface during the next start or stop operation of coating the web.

Arrangement in connection with curtain coating of a fibrous web

A method and apparatus for exhausting gas from a coating material. The coating material is fed in the bottom part area of a drum () rotating around an essentially vertical axis inside a vacuum tank (), whereby the rotating motion of the drum causes the coating material to rise up the inner wall of the drum and to discharge from the upper edge of the drum as a thin film against the inner wall of a vacuum tank, wherefrom the coating material flows downwards. The coating material is arranged to rise up the wall of the drum stepwise, so that the coating material will form a thin veil-like film on at least two different step levels (-), whereupon the gas bubbles in the coating material will break and be discharged from the coating material.

Method and arrangement for exhausting gas from a coating material

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Järvenpää, Finland

Timo Nurmiainen