The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 2009
Filed:
Aug. 03, 2004
James M. Nelson, Lino Lakes, MN (US);
Raghunath Padiyath, Woodbury, MN (US);
Robert B. Secor, Stillwater, MN (US);
Mark J. Stevenson, Forest Lake, MN (US);
Michael J. Tichy, Staples, MN (US);
Robert A. Yapel, Oakdale, MN (US);
James M. Nelson, Lino Lakes, MN (US);
Raghunath Padiyath, Woodbury, MN (US);
Robert B. Secor, Stillwater, MN (US);
Mark J. Stevenson, Forest Lake, MN (US);
Michael J. Tichy, Staples, MN (US);
Robert A. Yapel, Oakdale, MN (US);
3M Innovative Properties Company, Saint Paul, MN (US);
Abstract
The invention is a method of forming extrudate having substantially uniform thickness. A shim is formed which has a thickness variation of less than or equal to about 0.5 mil (13 microns) total indicated runout. This shim is disposed between a first die portion having a first surface and a second die portion having a second surface. A slot is formed between the first surface and the second surface. The slot has a height dimension substantially the same as the shim thickness. Flowable material is extruded through the slot.