The Gillette Company

Manohar S Grewal

Donald R Chaulk

Kevin P McDonough

William J Felton

John A Hindley

James W Walsh

Theodore J Campo

Mark D Lincoln

John F Krantz

Hoang Mai Trankiem

Chong-Ping P Chou

A machine for removing oil, dirt and grinding debris from a metal surface comprises a plurality of wash, rinse and dry stations separated to prevent contamination carryover from one station to the next. Razor blades in stacks are passed through the stations, the stacked blades being mounted on rods supported by a fixture and the nozzles or jets within the machine being so oriented as to cause a riffling of the blades due to water or air pressure. A purified water rinse and preferably an aqueous cleaning solution are employed in the machine and are circulated through the stations by a flow system which provides efficient and economical usage of the cleaning solution and rinse materials.

Aqueous cleaning of blade stack

A method of manufacturing a razor blade includes steps for removing oil, dirt and grinding debris from a metal surface by providing a plurality of wash, rinse and dry stations separated to prevent contamination carryover from one station to the next. Razor blades in stacks are passed through the stations, the stacked blades being mounted on rods supported by a fixture and the nozzles or jets within the machine being so oriented as to cause a riffling of the blades due to water or air pressure. A purified water rinse and preferably an aqueous cleaning solution are employed in the method and are circulated through the stations by a flow system which provides efficient and economical usage of the cleaning solution and rinse materials.

A method of manufacturing a razor blade is disclosed wherein a polymer material is coated onto the blade edge. The polymer material is applied to the blade edge in a coating solution after which the blade is heated to melt the polymer via a radio frequency source, preferably a microwave source.

Method of applying polymers to razor blade cutting edges

Aqueous cleaning method

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.

Razor technology

Growing community of inventors

Hanover, MA, United States of America

Manohar S Grewal