The Gillette Company

Bin Shen

Thorsten Knobloch

Kenneth James Skrobis

Yongqing Ju

Matthew Robert Stone

John Joseph Nisby

Jason Scott Slattery

Joseph Allan DePuydt

Ronald Richard Duff, Jr

William Owen Jolley

John Lawrence Maziarz

Oliver Heinz Claus

Jeffrey Stuart Parker

Joe David Lussier

Ming Laura Xu

A razor blade including: a substrate having a tip portion including a tip region, a blade body including a base, and first and second outer sides disposed opposite a split line of the substrate that converge at a tip; and first and second coatings disposed substantially on the first and second outer sides, respectively. Also provided is a method of coating the razor blade, including: applying a first coating to at least a portion of the first outer side; and applying a second coating to at least a portion of the second outer side. The first and second coatings each extend from the tip region toward the base and are substantially different, as compared to each other.

Coatings for a razor blade

A razor blade including a substrate with a coating joined to the substrate defining a coated blade. The coated blade including a cutting edge being defined by a blade tip having a tip radius of from 50 to 350 angstroms. The coated blade having a pair of first facets extending from the blade tip and a pair of second facets extending from the respective first facets, a facet angle from 90&#xb0; to 135&#xb0;, a facet width from 0.38 micrometers to 0.65 micrometers a wedge angle from 5&#xb0; to 30&#xb0;, and a thickness of between 0.8 and 1.5 micrometers measured at a distance of 1 micrometer from the blade tip.

Razor blades having a wide facet angle

A razor blade including: a substrate having a tip portion including a tip region, a blade body including a base, and first and second outer sides disposed opposite a split line of the substrate that converge at a tip; and first and second coatings disposed substantially on the first and second outer sides, respectively. Also provided is a method of coating the razor blade, including: applying a first coating to at least a portion of the first outer side; and applying a second coating to at least a portion of the second outer side. The first and second coatings each extend from the tip region toward the base and are substantially different, as compared to each other. One or both of the first and second coatings comprise a plurality of layers of material.

Multi-layer coatings for a razor blade

A razor blade having a substrate with a cutting edge being defined by a sharpened tip is provided where the substrate is comprised of a molybdenum (Mo) content of about 1.6% to about 5% by weight of composition and thicknesses of 1.60-1.75 &#x3bc;m and 9.25-10.00 &#x3bc;m measured at a distance of 4 and 40 &#x3bc;m from the blade tip, respectively. This thickness ratio is between 0.165-0.185. The substrate thickness is about 2.70-3.00 &#x3bc;m at 8 &#x3bc;m from the blade tip, about 4.44-5.00 &#x3bc;m at 16 &#x3bc;m from the blade tip with a thickness ratio measured at 4 &#x3bc;m and 8 &#x3bc;m between 0.56-0.62, and a thickness ratio measured at 4 &#x3bc;m and 16 &#x3bc;m between 0.32-0.40. The edge shape may be defined by equation w=adwith 'a' between 0.50-0.62 and 'n' between 0.76-0.80. A semi-included angle less than 7&#xb0; is measured at a distance of 40 &#x3bc;m or greater from the blade tip. This substrate will have substantially no cracks.

Razor blade

A razor blade having a substrate with a cutting edge being defined by a sharpened tip. The substrate has thicknesses of 1.60-1.75 micrometers and 9.25-10.00 micrometers measured at a distance of four and forty micrometers from the blade tip, respectively. A ratio of the thickness measured at four micrometers to the thickness measured at forty micrometers is between 0.165-0.185. The substrate thickness is about 2.70-3.00 micrometers at eight micrometers from the blade tip, about 4.44-5.00 micrometers at sixteen micrometers from the blade tip with a thickness ratio measured at four micrometers and eight micrometers between 0.56-0.62, and a thickness ratio measured at four micrometers and sixteen micrometers between 0.32-0.40. The blade edge shape is defined by equation w=adwhere 'a' is between 0.50-0.62 and 'n' is between 0.76-0.80. An included angle of less than 7&#xb0; is measured at a distance of forty micrometers or greater from the blade tip. A nitrided substrate may also be provided.

Razor blades

Growing community of inventors

Allston, MA, United States of America

Bin Shen