3m Innovative Properties Company

Thomas L Morse

Jeffrey W McCutcheon

Michael A Jung

Brian L Johnson

Richard Paul Bushman

Alfred D Nelson

Brian D Johnson

A Dwayne Nelson

The present invention relates to a vibration damped spacer articles having good force (torque and/or pressure and/or stress) retention, and disk drives having a damped spacer article and a rotatable storage article inserted therein.

Damped spacer articles and disk drive assemblies containing damped spacer articles

A method of stamping a part from an elongated strip of multi-layered material. The multi-layered material includes a viscoelastic intermediate layer, and upper and lower layers that are relatively rigid with respect to the intermediate layer. The method includes providing symmetrically aligned top and bottom punches each including a material displacement edge corresponding with a desired shape of the part. Each of the material displacement edges are defined by a rake surface and a part interface surface that combine to form a positive rake angle. The strip is positioned between the top and bottom punches. The top and bottom punches then shear a portion of the upper and lower layers, respectively. More particularly, symmetrical groove patterns are formed in the upper and lower layers, defining a perimeter of the part. The part is then removed from the strip along the perimeter.

Method for stamping a part from a multi-layered strip

Growing community of inventors

Roseville, MN, United States of America

Thomas L Morse