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(11)

EP 1 066 134 A1

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(43) Date of publication: 10.01.2001 Bulletin 2001/02 (21) Application number: 99906733.3 (22) Date of filing: 04.02.1999

(51) International Patent Classification (IPC)7: B24D 5/06, B24D 3/08 (86) International application number: PCT/US9902/399 (87) International publication number: WO 9948/646 (30.09.1999 Gazette 1999/39)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB IE IT LI NL SE (30) Priority: 27.03.1998 US 49623 22.12.1998 US 218844 (71) Applicant: NORTON COMPANY Worcester,Massachusetts 01615-0138 (US)	(72) Inventors: RAMANATH, Srinivasan Holden, MA 01520 (US) WILLISTON, William, H. Holden, MA 01520 (US) BULJAN, Sergej-Tomislav Acton, MA 01720 (US) (74) Representative: Zimmermann & Partner  Postfach 33 09 20 80069 München 80069 München (DE)