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. 08, 2001
Filed:
Jul. 15, 1998
Herbert Britz, Ravensburg Weissenau, DE;
Axel Gommel, Ravensburg, DE;
Herbert Holik, Ravensburg, DE;
Martin Kemper, Ravensburg, DE;
Almut Kriebel, Weingarten, DE;
Wolfgang Mannes, Ravensburg-Bavendorf, DE;
Boris Reinholdt, Waldburg, DE;
Klaus Steinbild, Ravensburg, DE;
Voith Sulzer Papiertechnik Patent GmbH, Ravensburg, DE;
Abstract
The process is designed for the flotation of interfering materials from an aqueous fibrous pulp suspension and is in particular used in the processing of printed or used paper that is otherwise contaminated. The separation of gas bubbles of the suspension occurs in a flotation layer that has a maximum thickness of approximately 100 mm. The process also achieves good flotation results in fibrous pulp suspensions that have a fiber pulp content significantly larger than 1% by weight, for example around 2% by weight. A flotation apparatus is provided for performing the flotation process. The apparatus includes a flotation vessel, an inlet, an outlet, and a skimmer device.