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:
Mar. 06, 2001
Filed:
Feb. 12, 1998
Rudolf Hasenfuss, Herbrechtingen, DE;
Joachim Grabscheid, Heuchlingen, DE;
Christian Schiel, Murnau, DE;
Wolfgang Schuwerk, Kiesslegg, DE;
Voith Sulzer Papermaschinen GmbH, Heidenheim, DE;
Abstract
A press device for draining and/or smoothing, or shaping the surface and controlling the sheet structure of fibrous pulp webs with a surface weight of under 100 g/m,, such as the fibrous pulp webs used to make graphic papers. The device has a press area which includes at least one press nip through which, during operation, the fibrous pulp web is fed at a velocity of at least 1200 m/min, under simultaneous impingement by pressure. The press area includes at least two press zones subsequent to one another. The device is further characterized by a K value of at least 2.5 kPa·s·m. This K value is the product of L,and I,. L,is the length of the first press zone, measured along the direction in which the web runs, and I,is the total press impulse operating on the fibrous pulp web in the entire press area.