Headbox with turbulence generator pipe layers of different cross

Details Headbox with turbulence generator pipe layers of different cross Headbox with turbulence generator pipe layers of different cross

1991-05-09

1992-06-23

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

Running or indefinite length product forming and/or treating...

162336, D21F 100

Patent

active

051240025

ABSTRACT:
A headbox for a paper machine with a stock channel featuring an outlet gap. The stock channel is preceded by a turbulence generator in the form of a machinewide bundle of many turbulence pipes. The turbulence generator is composed of two or three machinewide layers of turbulence pipes. The turbulence pipes of adjacent layers differ primarily by different flow cross sections, preferably also by different axial spacings a, A.

REFERENCES:
patent: 3328237 (1967-06-01), Notbohm
patent: 3725197 (1973-04-01), Dahl et al.
patent: 3784726 (1988-11-01), Evalahti
patent: 3923593 (1975-12-01), Verseput
patent: 4897158 (1990-01-01), Weisshuhn et al.

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