Air guide box for the drying section of a high-speed paper machi

Details Air guide box for the drying section of a high-speed paper machi Air guide box for the drying section of a high-speed paper machi

1988-02-29

1989-08-15

Bennett, Henry A.

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

34120, F26B 1304

Patent

active

048562050

ABSTRACT:
Air guide box 20 for a paper machine where the paper web 16 to be dried runs together with the backing belt 18 across drying cylinders 10 through 14. The air guide box 20 extends from a point A where the backing belt 18 departs from a cylinder 10, 12 toward a point Z where the backing belt runs on the following cylinder 11, 13. A diverging gap 23 remains between the air guide box 20 and the backing belt 18. The air guide box 20 has in the area of the departure point A a mechanical air boundary layer stripper 25. Facing toward the backing belt 18 and diverging in its running direction from the contact screen, the wall 21 of the air guide box 20 is shaped in accordance with the operationally occurring curved trajectory of the contact screen 18, is composed, preferably in polygon fashion, from flat wall elements 21.1, 21.2 and 21.3.

REFERENCES:
patent: 3587177 (1971-06-01), Overly
patent: 4185399 (1980-01-01), Gladish
patent: 4441263 (1984-04-01), Vedenpaa
patent: 4502231 (1985-03-01), Fissmann et al.
patent: 4551203 (1985-11-01), Eskelinen
patent: 4628618 (1986-12-01), Virta et al.
patent: 4669198 (1987-06-01), Wedel
patent: 4716660 (1988-01-01), Thiele

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