3m Innovative Properties Company

3m Innovative Company

Mark R Dupre

Mark E Gardiner

Jeffrey E Clements

Stephen J Dreyer

Bryan V Hunt

Alan B Campbell

Dale L Ehnes

John F Van Derlofske, Iii

Patrick H Marushin

Todd M Johnson

Jayshree Seth

Leigh E Wood

Jeffrey O Emslander

Dennis G Welygan

Louis S Moren

Alan J Sipinen

William C Unruh

Robert D Kampfer

Francis V Loncar, Jr

Diane L Regnier

Robert W Shipman

Adam H Hesselroth

William H Hartt

John E Cejka

A light directing film includes a structured major surface with a plurality of microstructures extending along a first direction. Each microstructure has a first region and a second region different from the first region, a substantially constant height in the first region and a non-constant maximum height in the second region greater than the substantially constant height in the first region, and a same lateral cross sectional shape in the first region and the second region.

Light directing film and method for making the same

A cutting tool assembly having a tool post capable of lateral movement along a work piece to be cut and an actuator with at least one machined tool tip and possibly other tool tips. The actuator provides for control of the movement of the tool tip in an x-direction into and out of the work piece in order to make continuous or discontinuous diffractive features in it. The machined work piece can be used to make articles having diffractive features such as optical films having lenslets.

Optical film having a set of diffractive features randomly repeating at variable distances

Test method for determining (e.g. prism) microstructure deformation of a microstructured (e.g. brightness enhancing) film are described.

Test method for determining microstructure deformation resistance of a microstructured film

A cutting tool assembly having a tool post capable of lateral movement along a work piece to be cut and a shank on the tool post holding at least one machined tool tip and possibly other tool tips. The tool tip has diffractive features in contact with the work piece in order to machine macro-scale features having nano-scale features. The machined work piece can be used to make articles having diffractive features such as optical films having lenslets.

Cutting tool using one or more machined tool tips with diffractive features

Cutting tool using one or more machined tool tips with diffractive features in a continuous or interrupted cut fast tool servo

A web of material has a plurality of stems extending from at least one side of the web. The web includes a first layer of material having a first side and a second side and a second layer of material. The second layer of material has a first side which faces the first side of the first layer and a second side from which the plurality of stems extend. The first and second layers of material are joined together while they are both molten, before either layer has cooled. The first and second layers of material can be formed of thermoplastic material or melt processable polymeric material. A method of making a web of material includes selecting a first material for a first layer of material and selecting a second material for a second layer of material. The first and second layers of material are melt formed. Then, the first and second layers of material are joined while the layers are in the molten state to form a multiple layer sheet. Next, a plurality of stems are formed on at least the second layer of material. Melt forming can include simultaneously melt forming the first and second layers of material such as by coextrusion.

Coextruded mechanical fastener constructions

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Oakdale, MN, United States of America

Mark R Dupre