Method and apparatus for blowing drying gas in a paper machine

Details Method and apparatus for blowing drying gas in a paper machine Method and apparatus for blowing drying gas in a paper machine

2006-03-28

2006-03-28

Rinehart, Kenneth (Department: 3749)

Drying and gas or vapor contact with solids

Process

Gas or vapor contact with treated material

C034S114000, C034S119000

Reexamination Certificate

active

07017279

ABSTRACT:
A method of blowing drying gas against a paper web, and an impingement dryer of a paper machine. Drying gas is blown with an impingement dryer comprising several profiling chambers in the cross-direction of a paper machine, the cross-profile of the paper web being controlled with the drying gas blown from the profiling chambers. Each profiling chamber blows drying gas to its own effect range. The impingement dryer further comprises a return air chamber and return air ducts such that drying gas blown against the paper web from the profiling chambers is returned into the return air chamber through the return air ducts in such a way that some of the effect of the drying gas blown from the profiling chamber is at least partly prevented from reaching the effective area of the adjacent profiling chamber.

REFERENCES:
patent: 3089252 (1963-05-01), Daane et al.
patent: 4573402 (1986-03-01), Sharma et al.
patent: 5090133 (1992-02-01), Taylor
patent: 5752324 (1998-05-01), Muller et al.
patent: 36 14 534 (1987-07-01), None
patent: 1 143 067 (2001-10-01), None
patent: WO 99/51813 (1999-10-01), None
Copy of Official Action issued in Finnish Priority Appl. No. 20011363 dated May 13, 2002.
Copy of International Search Report for PCT/FI02/00556 dated Oct. 7, 2002.

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