Global Patent Index - EP 0885093 A4

EP 0885093 A4 2000-04-12 - CUTTING INSTRUMENTS

Title (en)

CUTTING INSTRUMENTS

Title (de)

SCHNEIDEINSTRUMENTE

Title (fr)

INSTRUMENTS COUPANTS

Publication

EP 0885093 A4 (EN)

Application

EP 97907629 A

Priority

  • US 9702324 W
  • US 1164896 P
  • US 2925196 P
  • US 3678497 P

Abstract (en)

[origin: WO9729892A1] A process for making a cutting instrument (32) includes cutting a blank (350) from a plate (352) or strip of Type 60 Nitinol, having a thickness of between 0.005''-0.500'' using an abrasive waterjet (360), wire electron discharge machining (EDN) or laser cutting, and grinding top and bottom surfaces of the blank (350) by rotating a grinder (382) having cubic boron nitride or diamond abrasive particles on a cutting surface of said grinder (382) against the knife blank (350) at a surface speed of about 5000 to 7000 surface feet per minute and grinding to a depth of about 0.001 to 0.005 inches per pass to remove material along the blade surface. The surface of the blade (34) is polished to a surface finish smoother than 20 microinches RMS using Turkish emery abrasive grinding/polishing materials on a buffing wheel driven by a high power motor. The blade is then finish polished to a mirror-like luster of 2 microinches RMS or less using a fine diamond buffing compound and a buffing wheel running at about 3000 RPM. An edge (390) is ground into the polished blade blank using an Arkansas stone grinder.

IPC 1-7 (main, further and additional classification)

B26B 9/00

IPC 8 full level (invention and additional information)

B26B 9/00 (2006.01)

CPC (invention and additional information)

B26B 9/00 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH DE ES FR GB IT LI NL SE

EPO simple patent family

WO 9729892 A1 19970821; AU 1958797 A 19970902; CA 2257065 A1 19970821; EP 0885093 A1 19981223; EP 0885093 A4 20000412

INPADOC legal status


2003-12-17 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20030617

2003-03-19 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20030204

2000-04-12 [A4] DESPATCH OF SUPPLEMENTARY SEARCH REPORT

- Effective date: 20000223

2000-04-12 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

- Designated State(s): AT BE CH DE ES FR GB IT LI NL SE

1998-12-23 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19980819

1998-12-23 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH DE ES FR GB IT LI NL SE