Device for stabilizing the run of a material web, specifically f

Details Device for stabilizing the run of a material web, specifically f Device for stabilizing the run of a material web, specifically f

1988-02-29

1989-03-07

Warner, Steven E.

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

34120, 34123, F26B 1102

Patent

active

048094455

ABSTRACT:
In a device for stabilizing the run of a material web, which successively runs over two rolls, namely a delivering and a receiving roll, there is a box provided that extends between the delivering and the receiving roll across the width of the paper web. This box has a so-called guide wall that extends along the course of the material web, with an air gap remaining between the guide wall and the material web. Additionally provided on the box are means which create a vacuum in the air gap. In a device of this type, the guide wall is shaped in a way such that its spacing from the theoretical trajectory plane tangent to the two rolls is in the center area of the material web greater than it is in the araa of the material web edges. A device of this type serves to better stabilize the smooth running of the material web on its way between the rolls. A preferred applicational area of the invention is an air guide box (20) for the drying section of a high-speed paper machine where the paper web (16) to be dried meanders together with a backing belt (18) over drying cylinders (10-14).

REFERENCES:
patent: 3587177 (1971-06-01), Overly
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: 4669196 (1987-06-01), Wedel
patent: 4686777 (1987-08-01), Cooke
patent: 4698919 (1987-01-01), Wedel

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