Patent Number: 6,168,681

Title: Method of making a filter device

Abstract: A filter device filters contaminants from air for magnetic disk drive systems. The filter has layers of permeable fabric material allowing flow through the filter. An adsorptive slurry is deposited in a discreet pattern onto one layer with a cover layer mounted over the adsorptive deposit. The slurry retains a high adsorptive material surface area for improved adsorption of contaminants. The slurry is placed onto the base material using a screening or other similar application method.

Inventors: Bellefeuille; Cynthia D. (Eden Prairie, MN), Dallas; Andrew J. (Apple Valley, MN), Wright; M. E. (Apple Valley, MN), Madden; Michael A. (Woodbury, MN), Nunnink; Suzan K. (Delano, MN)

Assignee: Donaldson & Company, Inc.

International Classification: B32B 37/30 (20060101); B32B 031/00 ()

Expiration Date: 01/02/2018