Robert D Fehr

US Patent:

6824378, Nov 30, 2004

Filed:

May 31, 2002

Appl. No.:

10/160744

Inventors:

Vincent W. King - Woodbury MN
Joseph M. DSa - Woodbury MN
Robert T. Fehr - Saint Paul MN
James A. Servatius - St. Paul MN

Assignee:

3M Innovative Properties Company - Saint Paul MN

International Classification:

B29C 3310

US Classification:

425542, 425363, 425471, 425812

Abstract:

In one embodiment, a microreplication tool includes gas release features that allow gas to escape from microreplication cavities of the tool. The gas release features can be disposed at the bottoms of the respective cavities to avoid air entrapment within the cavities of the tool during the microreplication process. In this manner, the quality of the microreplicated product can be improved.