Method and apparatus in the surface sizing of a paper or board web
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jun 2, 2009
Grant Date -
Jun 15, 2006
app pub date -
Jun 7, 2004
filing date -
Jun 5, 2003
priority date (Note) -
Expired
status (Latency Note)
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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 (W.sub.1) 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 (W.sub.1) in the direction of the second side (W.sub.2) into the web (W). Correspondingly, both sides of the web (W) can be treated in successive stages.
First Claim
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International Classification(s)
- 2004 Application Filing Year
- B05C Class
- 384 Applications Filed
- 119 Patents Issued To-Date
- 30.99 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- B05C Class
- 0 % this patent is cited more than
- 16 Age
