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:
May. 21, 2002
Filed:
Jan. 04, 2001
Applicant:
Inventors:
Jürgen Dockal-Baur, Fronreute, DE;
Axel Gommel, Ravensburg, DE;
Wolfgang Müller, Weingarten, DE;
Harald Selder, Schlier, DE;
Andreas Steidele, Ravensburg, DE;
Klaus Steinbild, Appleton, WI (US);
Assignee:
Voith Paper Patent GmbH, Ravensburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21B 1/32 ;
U.S. Cl.
CPC ...
D21B 1/32 ;
Abstract
Process for dissolving used paper including adjusting a content of solid particles of used paper to a range between about 15 and 35%, kneading the used paper with a specific work of at least about 10 kWh/t, diluting the kneaded used paper to a content of solid particles below about 6%, separating non-fibrous contaminants with wet screening, adjusting a solid material content to less than about 3%, and separating heavy particles with at least one hydrocyclone.