Patent · US Expired

Headbox turbulence generator

US6099692A · kind A · utility

11Cited by

8References

8Claims

0Family size

Assignee

Voith Sulzer Papiermaschinen GmbH · DE

Inventors

Elmer Weisshuhn · Weingarten, DE
Ulrich Begemann · Leonberg, DE
Volker Schmidt-Rohr · Heidenheim, DE

Key dates

Filing date	Jul 6, 1998
Grant date	Aug 8, 2000
Priority date	—
Expiry date	Jul 6, 2018

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21F1/026
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A headbox of a paper or board machine having an inlet, a distributor for feeding stock suspension to be distributed over the machine width into the inlet. A turbulence generator downstream of the distributor has a hydraulic diameter of less than 17 mm in the downstream end region. The hydraulic diameter is the diameter of individual channels through the turbulence generator. The turbulence generator has channels or plates that define several channels, each in accordance with the desired hydraulic diameter. Dimensions of the hydraulic diameter are disclosed. The turbulence generator has lands at the downstream end. The land area ratio is disclosed. A nozzle or the like downstream of the turbulence generator introduces the stock suspension over the machine width to a wire or wires of the next section.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.