Razor technology
AssigneeThe Gillette Company
InventorsManohar S. Grewal, Chong-Ping P. Chou
Life of this patent
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Abstract
A razor blade includes a substrate with a wedge-shaped edge, a layer of molybdenum on the tip and flanks of the wedge-shaped edge, the thickness of the molybdenum layer preferably being in the range of about 50-500 angstroms, and a layer of diamond or diamond-like material on the molybdenum layer that preferably has a thickness of about 200-1,500 angstroms and that defines a tip radius of less than about 1000 angstroms.
Claims19
A process for forming a razor blade comprising the steps of
- providing a substrate,
- forming a wedge-shaped sharpened edge on said substrate that has an included angle of less than thirty degrees and a tip radius of less than twelve hundred angstroms;
- depositing a layer of molybdenum on said sharpened edge;
- depositing a layer of diamond or diamond-like carbon material on said molybdenum layer;
- and applying an adherent polymer coating on said diamond or DLC coated cutting edge.
A process for forming a razor blade comprising the steps of providing a substrate, forming on said substrate a wedge-shaped edge that has an included angle of less than 30.degree. and a tip radius less than 1,200 angstroms;
- depositing a layer of molybdenum on said wedge-shaped edge;
- depositing a layer of diamond or diamond-like material on said molybdenum layer to provide a radius at the ultimate tip of said diamond or diamond-like material of less than 1,200 angstroms;
- and applying and adherent polymer coating on said diamond or DLC coated cutting edge.
A razor blade comprising a substrate with a wedge-shaped edge defined by facets that have a width of at least about 0.1 millimeter and an included angle of less than thirty degrees, a layer of molybdenum on said wedge-shaped edge;
- a layer of diamond or diamond-like carbon material on said molybdenum layer;
- and applying an adherent polymer coating on said diamond or DLC coated cutting edge.
A razor blade comprising a substrate with a wedge-shaped edge, a layer of molybdenum on the tip and flanks of said wedge-shaped edge, the thickness of said molybdenum layer being in the range of about 50-500 angstroms, and a layer of diamond or diamond-like carbon material on said molybdenum layer, said layer of diamond or diamond-like carbon material having a thickness of about 200-1,500 angstroms and defining a tip radius of less than about 1,000 angstroms.
A shaving unit comprising support structure that defines spaced skin-engaging surfaces, and razor blade structure secured to said support structure, said razor blade structure including a substrate with a wedge-shaped edge, a layer of molybdenum on said wedge-shaped edge;
- a layer of diamond or diamond-like carbon material on said molybdenum layer, said diamond or diamond-like carbon coated wedge-shaped edge being disposed between said skin-engaging surfaces;
- and an adherent polymer coating on each said layer of diamond or diamond-like carbon material.
Dependencies are inferred from the claim text.