Dust collection device for sanding tool

US8070862B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Edward J. Woo · Woodbury, US
• Seyed A. Angadjivand · Woodbury, US
• Rufus C. Sanders, Jr. · Burnsville, US
• Edward L. Manor · Lakeland, US
• Robert A. Harkins · Savage, US
• Ehrich J. Braunschweig · Woodbury, US
• Joseph B. Eckel · Vadnais Heights, US
• Timothy J. Rowell · Windom, US

Key dates

• Filing date: Jul 28, 2008
• Grant date: Dec 6, 2011
• Expiry date: Jun 15, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S55/39
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A dust collection device for a sanding tool comprising a bag having a sidewall and a coupler attached to the bag. The sidewall comprising a first filter layer, a second filter layer, and an outer support layer. The first filter layer comprising a plurality of fibrillated electrostatically charged electret fibers forming a nonwoven web; the first filter layer having a total pressure drop between about 0.1 to about 4.0 mm H2O, and the first filter layer having a total basis weight between about 50 to about 450 gram/m2. The second filter layer comprising a melt blown microfiber nonwoven web; the second filter layer having a total pressure drop between about between about 5.5 to about 20.0 mm H2O, and the second filter layer having a total basis weight between about 15 to about 75 grams/m2.