The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 1998
Filed:
Feb. 13, 1997
Applicant:
Inventor:
Helmut Heinzmann, Bohmenkirch, DE;
Assignee:
Voith Sulzer Papiermaschinen GmbH, Heidenheim, DE;
Primary Examiner:
Int. Cl.
CPC ...
D21F / ;
U.S. Cl.
CPC ...
162216 ; 162258 ; 162343 ;
Abstract
The invention concerns a headbox of a paper machine wherein an inlet region is provided along the entire width of the machine for introducing the pulp suspension, a discharge region is provided for distributing the pulp suspension along the width of at least one screen, and channels are provided between the inlet region and discharge region in which turbulence is produced in the pulp suspension (turbulence region). According to the invention, the turbulence region is formed with the aid of a number of channels, the cross-section of which, perpendicularly to the plane of flow, has an elongated form and may be variable.