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:
Jul. 04, 2000
Filed:
Jul. 16, 1998
Applicant:
Inventors:
Axel Gommel, Ravensburg, DE;
Martin Kemper, Ravensburg, DE;
Assignee:
Voith Sulzer Papiertechnik Patent GmbH, Ravensburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C / ; B03D / ; B03D / ; B03D / ;
U.S. Cl.
CPC ...
209164 ; 209170 ; 2102212 ; 162-4 ;
Abstract
A process and apparatus serves to remove solid matter from an aqueous material suspension produced from printed used paper. As many interfering material particles are collected by floatation as possible in a floatation foam and diverted as a reject. A perforated separating element is located above the fibrous material suspension. Between the separating element and the floatation foam, an intermediate layer is formed. In the intermediate layer the fibers, which have been entrained by gas bubbles are again rinsed and retrieved.