Patent · US Expired

Headbox nozzle with heavy end convergence

US5599428A · kind A · utility

4Cited by

7References

6Claims

0Family size

Assignee

J.M. Voith GmbH · DE

Inventors

Albrecht Meinecke · Heidenheim, DE
Helmut Heinzmann · Böhmenkirch, DE
Wolfgang Ruf · Friedberg, DE
Dieter Egelhof
Volker Schmidt-Rohr · Heidenheim, DE

Key dates

Filing date	Jul 12, 1994
Grant date	Feb 4, 1997
Priority date	—
Expiry date	Jul 12, 2014

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21F9/006
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A nozzle of a multilayer headbox wherein the headbox includes a nozzle for distributing the stock suspension on a wire. The nozzle is subdivided by at least one machine-wide fin, the fin forming with the nozzle at least two machine-wide nozzle ducts. At least the mean value of the clearance of at least one nozzle duct diminishes steadily in the flow direction, the percentage decrease of the clearance in the fluidically essential area of the nozzle being at least twice as large as in the starting area of the nozzle. The fin has downstream end area of decreasing thickness immediately preceded by an area of increasing thickness.

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