Razor blade coating
AssigneeBic-Violex SA
InventorsStergios Logothetidis, Nikolaos Kalfagiannis, Constantinos Mavroidis, Vassilis Papachristos, Michallis Karoussis
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Abstract
A razor blade substrate having a substrate that includes a blade edge portion having a profiled geometry which is covered by a strengthening coating deposited on the razor blade substrate at least at the blade edge portion. The strengthening coating covering the blade edge tip, having a profiled geometry and having a tapering geometry with two coating sides converge toward a blade edge tip. The strengthening coating includes a strengthening layer made of a titanium- and boron-containing material.
Claims27
A razor blade comprising a blade edge portion, the razor blade comprising:
- a razor blade substrate having a substrate edge portion in the blade edge portion of the razor blade, the substrate edge portion having a profiled geometry and having a tapering geometry with two substrate sides converging toward a substrate tip,
- a strengthening coating deposited on the razor blade substrate at least at the blade edge portion, the strengthening coating covering the substrate tip, the strengthening coating having a profiled geometry and having a tapering geometry with two coating sides converging toward a coating tip,
- the strengthening coating including a strengthening nanocrystalline layer made of a mixture of titanium and boron, with at least one of Titanium-rich areas and Boron-rich areas, where “rich” is used by reference to a stoichiometric TiB2 composition,
- wherein the average proportion of boron and titanium atoms in the strengthening layer is between 1.3:1 and 2.3:1.
A razor blade comprising a blade edge portion, the razor blade comprising:
- a razor blade substrate having a substrate edge portion in the blade edge portion of the razor blade, the substrate edge portion having a profiled geometry and having a tapering geometry with two substrate sides converging toward a substrate tip,
- a strengthening coating deposited on the razor blade substrate at least at the blade edge portion, the strengthening coating covering the substrate tip, the strengthening coating having a profiled geometry and having a tapering geometry with two coating sides converging toward a coating tip,
- wherein the strengthening coating comprises a mixture of titanium and boron,
- wherein the strengthening layer is deposited under conditions which, when applied to deposition on a flat witness sample, provide a coating the density of which is above 3.9 grams per cubic centimeter (g/cm3).
A razor blade comprising a blade edge portion, the razor blade comprising:
- a razor blade substrate having a substrate edge portion in the blade edge portion of the razor blade, the substrate edge portion having a profiled geometry and having a tapering geometry with two substrate sides converging toward a substrate tip,
- a strengthening coating deposited on the razor blade substrate at least at the blade edge portion, the strengthening coating covering the substrate tip, the strengthening coating having a profiled geometry and having a tapering geometry with two coating sides converging toward a coating tip,
- wherein the strengthening coating comprises a mixture of titanium and boron,
- wherein a combined thickness of the blade substrate and strengthening coating, measured between the two coating sides orthogonal to a line bisecting the blade edge portion, at a distance of 5 micrometers from the coating tip, is between 1.8 and 2.5 micrometers, and preferably between 1.9 and 2.4 micrometers.
A razor blade comprising a blade edge portion, the razor blade comprising:
- a razor blade substrate having a substrate edge portion in the blade edge portion of the razor blade, the substrate edge portion having a profiled geometry and having a tapering geometry with two substrate sides converging toward a substrate tip,
- a strengthening coating deposited on the razor blade substrate at least at the blade edge portion, the strengthening coating covering the substrate tip, the strengthening coating having a profiled geometry and having a tapering geometry with two coating sides converging toward a coating tip,
- wherein the strengthening coating comprises a mixture of titanium and boron,
- wherein a combined thickness of the blade substrate and strengthening coating, measured between the two coating sides orthogonal to a line bisecting the blade edge portion, at a distance of 20 micrometers from the coating tip, is between 5.1 and 7.3 micrometers, and preferably between 5.4 and 7.1 micrometers.
Dependencies are inferred from the claim text.