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:
Jan. 20, 2004
Filed:
Jun. 24, 2002
Sakari Soini, Somero, FI;
Metso Paper, Inc., Helsinki, FI;
Abstract
In a paper machine headbox, a stock suspension flow passes through turbulence pipes (14 ) and is distributed into superimposed layers. Stepped expansion spots ( ) of the flow cross-section area of the turbulence pipes ( ) or the positions of trailing elements starting from between the pipe rows (R ) and extending to the slice duct ( ) of the headbox control the onset and level of turbulence in each layer. Turbulence is generated in different phases of the flow in different layers by arranging the expansion spots ( ) and/or the trailing elements in superimposed layers to be located at different distances from the slice opening ( ) of the headbox, whereby a different turbulence prevails at the slice opening ( ) in different layers of the stock suspension flow.