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US 6,988,318 B2Granted
Coating for cutting implements
AssigneeAcme United Corporation
InventorsLarry Buchtmann, Gary Pia
Life of this patent
Estimating the term…
Abstract
A cutting implement having a pair of cutting blades and a coating is provided. The coating has titanium chromium nitride and provides the cutting blades with a satin silver appearance. In some embodiments, the titanium chromium nitride coating has a thickness in a range between about 0.3 microns and 0.5 microns, a surface roughness in a range of about 15 to 25 10−6 inch/inch, and a hardness in a range of about 5.7 to about 9.1 gegapascals.
Claims17
A cutting implement comprising:
- a pair of complementary cutting blades, each having a cutting edge;
- and
- a coating disposed on each of said pair of complementary cutting blades, wherein said coating has about 35 percent by weight of titanium nitride and about 65 percent by weight of chromium nitride and provides said pair of complementary cutting blades with a satin silver appearance.
A cutting implement comprising:
- a pair of complementary cutting blades;
- and
- a titanium chromium nitride coating disposed on each of said pair of complementary cutting blades, wherein said titanium chromium nitride coating has a thickness in a range between about 0.3 and 0.5 microns, a surface roughness in a range of about 15 to 25 10−6 inch/inch, and a hardness in a range of about 5.7 to about 9.1 gigapascals, as measured by Vickers microhardness testing according to American Society of Testing and Materials (ASTM) E384, as revised, March 2001.
Dependencies are inferred from the claim text.