Drying and gas or vapor contact with solids – Process – Gas or vapor contact with treated material
Reexamination Certificate
2005-06-28
2005-06-28
Bennett, Henry (Department: 3743)
Drying and gas or vapor contact with solids
Process
Gas or vapor contact with treated material
C034S456000, C034S111000, C034S117000, C034S635000, C034S641000
Reexamination Certificate
active
06910282
ABSTRACT:
A web (16) running from an opening nip (K1) between a cylinder (10) and a supporting fabric (18) toward a roll (14), is supported by a negative pressure created by a blow box (30). In an intensified negative pressure region (34′), i.e. close to the disengaging point (40) between the supporting fabric and the cylinder, the pressure is greater than at a distance from this disengaging point. The negative pressure is controlled according to parameters which act on the runability of the web and which can be varied, such as web velocity, web solid contents, pulp composition, paper or paper board quality, web grammage, a characteristic of the web, such as porosity, traction acting in the web, or web tension, cylinder temperature, and/or the running situation, such as a web break, a threading situation, or a normal run, so the desired runability is maintained between the cylinder and the roll.
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Jokinen Reijo
Juppi Kari
Komulainen Antti
Bennett Henry
Metso Paper Inc.
Ragonese Andrea M.
Stiennon & Stiennon
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