Method and apparatus in a paper machine for regulating...

Details Method and apparatus in a paper machine for regulating... Method and apparatus in a paper machine for regulating...

D - Textiles, Paper

21

J

92/17.2

D21J 7/00 (2006.01) D21F 1/02 (2006.01)

Patent

CA 1255528

ABSTRACT OF THE DISCLOSURE Method and apparatus for regulating pressure in a wedge-shaped space between the wall of the headbox lip beam or the like and the breast roll. An arrangement is provided by which air jets are directed in a direction opposite to the direc- tion in which the forming wire moves on the breast roll to eject air out of the wedge-shaped space to maintain the pressure indu- ced therein at a desired level. The apparatus includes a blow box coupled to a source of pressurized air and the box having a wall in opposed relationship to the forming wire in which nozzle openings or slots are formed through which the air jets are directed. The blow box has a wider side which substantially clo- ses the wedge-shaped space. Water jets are directed into the wedge-shaped space by water supply devices provided on the blow box for cleaning purposes.

493784

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