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:
Oct. 13, 1981
Filed:
Apr. 01, 1980
Applicant:
Inventors:
Ulrich Beck, Bornheim-Merten, DE;
Ekhard Rohloff, Duesseldorf, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21F / ;
U.S. Cl.
CPC ...
162192 ; 162198 ; 162183 ; 162263 ;
Abstract
When a suspension is exposed to a field of ultrasound, a voltage can be tapped from two electrodes whose distance apart is an odd multiple of half ultrasonic wavelengths, and this voltage can be used as a controlling factor for the addition of, preferably, retention and flocculating agents to the suspension. The process is particularly suitable for fibre suspensions for the purpose of monitoring the starting process in paper machines and for rapid operating control.