(19)

(11)

EP 1 786 608 A1

(12)

(43) Date of publication: 23.05.2007 Bulletin 2007/21 (21) Application number: 05794830.9 (22) Date of filing: 07.09.2005

(51) International Patent Classification (IPC):  B28D 1/14(2006.01) B24B 9/14(2006.01) (86) International application number: PCT/US2005/031914 (87) International publication number: WO 2006/029229 (16.03.2006 Gazette 2006/11)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 08.09.2004 US 607580 P (71) Applicant: National Optronics, Inc. Charlottesville, Virginia 22902 (US)	(72) Inventors: ANDREWS, Daniel, E. Charlottesville, Virginia 22901 (US) SCHAEFFER, Kurt, W. Waynesboro, Virginia 22980 (US) (74) Representative: Paul, Dieter-Alfred  Patentanwalt Hellersbergstrasse 18 41460 Neuss 41460 Neuss (DE)