Patent · US Expired

Multiply headbox nozzle with heavy end convergence

US5804037A · kind A · utility

2Cited by

7References

12Claims

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	Oct 23, 1996
Grant date	Sep 8, 1998
Priority date	—
Expiry date	Oct 23, 2016

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.

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