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. 02, 2005
Filed:
Mar. 29, 2002
Mark Serafin, Apple Valley, MN (US);
Stanley R. Ellis, Mahtomedi, MN (US);
Leroy C. Erickson, Blaine, MN (US);
Scott A. Walker, White Bear Lake, MN (US);
Daniel W. Brandt, Stillwater, MN (US);
Mark Serafin, Apple Valley, MN (US);
Stanley R. Ellis, Mahtomedi, MN (US);
Leroy C. Erickson, Blaine, MN (US);
Scott A. Walker, White Bear Lake, MN (US);
Daniel W. Brandt, Stillwater, MN (US);
Imation Corp., Oakdale, MN (US);
Abstract
Techniques for precisely controlling the size of particles in a coating solution delivered to a coating apparatus involve continuous classification of coating particle size using a tangential flow filter assembly. The techniques may be particularly useful in the preparation of coating dispersions for manufacture of magnetic recording media. A classification technique makes use of a tangential flow filter assembly that permits delivery of coating particles below a maximum size threshold to a coating path. The filter assembly may be disposed in a circulation path that includes one or more processing devices to reduce the size of coating particles carried by a coating solution. The filter assembly enables coating particles above the maximum size threshold to be recirculated through the circulation path and subjected to repeated processing to reduce particle size to a desired size range.