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. 11, 1994
Filed:
Jun. 18, 1992
Edwin X Graf, Menasha, WI (US);
James L Strebig, Appleton, WI (US);
Voith, Inc., Appleton, WI (US);
Abstract
A headbox for a paper machine, with a main chamber through the lower part of which flows fiber suspension in the longitudinal machine direction. The main chamber has on the upstream end a first perforated roll and a machine-wide feed channel as well as on the downstream end a second perforated roll and a machine-wide nozzle type outlet channel. Provided between the perforated rolls is a vertical partition which is vertically adjustable, creating between the bottom of the main chamber and the partition a machine-wide channel section which is variable in its height. The downstream outside surface of the partition has a convex shape, in a fashion such that the clearance of the channel section increases in the direction of flow.