Paper making and fiber liberation – Apparatus – With coating or impregnating means
Reexamination Certificate
2004-06-07
2009-06-02
Hug, Eric (Department: 1791)
Paper making and fiber liberation
Apparatus
With coating or impregnating means
C162S135000, C162S137000, C118S050000, C118S223000, C427S209000, C427S296000
Reexamination Certificate
active
07540941
ABSTRACT:
An applicator device (1) applies surface size to at least one side of a web (W). A pressure effect is applied to the web (W) by subjecting the web (W) to an underpressure and/or to an overpressure such that surface size is forced to penetrate into the pores of the web. Most advantageously, an underpressure is created that sucks applied surface size from the surface of the web (W) into the pores in the inner layers. Surface size is applied to a web first side (W1) and a vacuum effect is applied to the web's opposite side (W2) to cause air to flow through the web (W) such that surface size moves from the first side (W1) in the direction of the second side (W2) into the web (W). Correspondingly, both sides of the web (W) can be treated in successive stages.
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Holopainen Kari
Lipponen Juha
Pakarinen Juha
Pakarinen Pekka
Tuomi Arto
Hug Eric
Metso Paper Inc.
Stiennon & Stiennon
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