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EP0089818A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Coatings for cutting blades

Assignee: United Kingdom Atomic Energy Authority
•
Filing: 1983-03-17
•
Granted: —
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Expires: 2003-03-17
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Abstract

Abstract An edge cutting implement is provided with a refractory material coating (e.g. of titanium nitride) by a coating technique such as sputter ion plating. …<??>The coating technique is carried out under conditions such that the coating terminates adjacent a cutting edge of the implement, e.g. 1/2 mm from the cutting edge. Thus, the cutting edge is not covered by the refractory material. A cutting implement so-coated is found to possess improved cutting performance compared with a similar but uncoated implement or with a similar implement where the cutting edge is coated. Also, use of titanium nitride as the refractory material imparts a decorative golden colour to the implement.

Inventors

  • 👤 Joseph Paul Coad
  • 👤 Samuel Robert Keown

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-07 09:08
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/54; B26B21/58; B26B21/60

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 28 words
An edged cutting implement carrying a refractory material coating, characterised in that the coating terminates adjacent a cutting edge of the implement thereby to improve its cutting performance.
Claim 2
Dependent Claim 28 words
An edged cutting implement carrying a refractory material coating, characterised in that the coating terminates adjacent a cutting edge of the implement thereby to improve its cutting performance.
Claim 3
Dependent Claim 14 words
An implement as claimed in claim 1 wherein the refractory material is titanium nitride.
Claim 4
Dependent Claim 17 words
An implement as claimed in either of the preceding claims in the form of a knife blade.
Claim 5
Dependent Claim 16 words
An implement as claimed in claim 1 or claim 2 in the form of a drill.
Claim 6
Independent Claim 53 words
A method of treating an edged cutting implement by depositing a coating of a refractory material on the implement by means of ion plating, characterised in that the ion plating is carried out under conditions such that the coating terminates adjacent a cutting edge of the implement thereby to improve its cutting performance.
Claim 7
Independent Claim 53 words
A method of treating an edged cutting implement by depositing a coating of a refractory material on the implement by means of ion plating, characterised in that the ion plating is carried out under conditions such that the coating terminates adjacent a cutting edge of the implement thereby to improve its cutting performance.
Claim 8
Dependent Claim 19 words
A method as claimed in claim 5 wherein the coating is carried out by means of sputter ion plating.

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