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:
Aug. 14, 2001
Filed:
Sep. 30, 1999
Applicant:
Inventor:
David A. Beck, Appleton, WI (US);
Assignee:
Voith Sulzer Papiertechnik GmbH, Heidenheim, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 3/904 ; B01D 3/908 ;
U.S. Cl.
CPC ...
B01D 3/904 ; B01D 3/908 ;
Abstract
A unitary membrane for use in a pressing apparatus includes a semipermeable portion structured and adapted to have a permeability which permits a predetermined fluid flow therethrough, which is positioned between a pair of longitudinal edge portions, wherein the unitary membrane includes a polymeric fabric. The unitary membrane has a thickness less than about 0.1 inches. A plurality of holes are formed through the polymeric fabric at the semipermeable portion. The semipermeable portion has a permeability greater than zero and less than about five CFM per square foot as measured by TAPPI test method TIP 0404-20.