3m Innovative Properties Company

Timothy J Rowell

Satinder K Nayar

Ronald W Gerdes

Rufus C Sanders, Jr

Catherine A Leatherdale

Edward J Woo

Seyed Abolhassan Angadjivand

Joseph B Eckel

Pingfan Peter Wu

Manjiri T Kshirsagar

Donald L Pochardt

Jennifer L Trice

Dennis Earl Ferguson

Ehrich J Braunschweig

Eumi Pyun

Peter T Benson

Thomas Herdtle

Edward L Manor

Stanley Rendon

Donald S Oblak

Sachin Talwar

Daniel J Zillig

Peihui Zhang

Robert A Harkins

Paul A Nielsen

Joseph S Warner

Bong Y Yeom

Liyun Ren

Jeffrey A Chambers

Ehrich J Bräunschweig

Verlin W Schelhaas

Rufus C Sanders

An assembly includes an enclosure including first and second regions spaced apart along a first direction, and a plurality of spaced apart acoustic baffles arranged along a second direction different from the first direction and disposed in the enclosure between the first and second regions. The plurality of spaced apart acoustic baffles includes adjacent first and second acoustic baffles. Each of the first and second acoustic baffles include an acoustically absorptive layer disposed on a sheet having a specific airflow resistance greater than 200 MKS Rayl. The first and second acoustic baffles define a channel therebetween. At least a portion of the channel extends along a longitudinal direction making an oblique angle with the first direction.

Assembly including acoustic baffles

A rotary acoustic horn. The rotary acoustic horn includes a shaft having an axial input end and an axial output end; and at least one welding portion; wherein the welding portion comprises an outer weld face that expands and contracts with the application of acoustic energy; wherein the welding portion comprises a first opposing end portion and a second opposing end portion; wherein the welding portion comprises through holes extending substantially along an axial direction of the welding portion from the first opposing end portion to the second opposing end portion; and wherein the through holes are located between the weld face and the shaft.

Rotary acoustic horn

Laminated articles are provided including a porous fibrous nonwoven matrix and guanidine-functionalized metal silicate particles enmeshed within the porous fibrous nonwoven matrix. The laminated articles further include a first substrate and a second substrate sealed to the first substrate. Methods of making laminated articles and methods of using laminated articles are also provided.

Laminated articles for microbial removal and low pressure drop filtration, methods of making, and methods of using same

An ultrasonic-assisted injection molding system and method for making precisely-shaped articles. A source of ultrasonic energy is positioned to apply vibrational energy to a mold cavity connected to at least one gate in flow communication with a source of molten (co)polymer. The mold is heated to a temperature of 104-116&#xb0; C., and the molten (co)polymer is injected into the mold cavity. After cooling the mold until the molten (co)polymer within the gate has solidified, ultrasonic energy is applied to the mold without remelting the solidified (co)polymer within the gate until the temperature increases to 116-122&#xb0; C., thereby substantially relieving flow induced stresses. The mold is then cooled until the temperature decreases to 101-107&#xb0; C., and is thereafter heated until the temperature increases to 116-122&#xb0; C., thereby substantially relieving any thermally induced stresses. The mold is cooled until the molten (co)polymer has solidified, thereby forming a precision molded plastic optical element.

Ultrasonic-assisted molding of precisely-shaped articles and methods

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 HO, and the first filter layer having a total basis weight between about 50 to about 450 gram/m. 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 HO, and the second filter layer having a total basis weight between about 15 to about 75 grams/m.

Dust collection device for sanding tool

An abrasive article having an apertured coated abrasive member, filter media, and an attachment interface member is formed by an ultrasonic welding process. The abrasive article is useful for abrading a workpiece.

Abrasive article and methods of making and using the same

Growing community of inventors

Saint Paul, MN, United States of America

Timothy J Rowell