US 5,492,038 AGranted

Shaving system

AssigneeThe Gillette Company

InventorsHenryk J. Chylinski, Chester F. Jacobson, Timothy M. Salisbury, Frederick R. Borden

Life of this patent

Estimating the term…

Loading patent…

Abstract

A shaving system of the wet shave type includes support structure and blade structure secured to the support structure. The blade structure has an aperture with an annular sharpened shaving edge that is defined by main facet portions that converge at an angle of less than 40.degree., and supplemental facet portions that are extensions of the main facet portions and converge at an included angle of less than 60.degree. to define an annular ultimate tip portion. The annular ultimate tip of the sharpened edge defines a shaving plane and the bisector of the included angle defined by the supplemental facets is disposed at an angle (shaving angle) in the range of 15.degree.-35.degree. to the shaving plane.

Claims8

Dependent claims

A method of manufacturing a razor blade comprising the steps of providing a blade member with an annular body portion and an annular flange portion at one end of said annular body portion that extends radially inward from said body portion,

disposing said blade member on a cylindrical mandrel of abrasive material that has an inclined facet at its upper end such that the inner surface of said inwardly facing flange portion is juxtaposed with and supported by said inclined facet,
providing abrasive structure adjacent the outer surface of said flange portion, and
producing relative motion between said abrasive structure and said blade member to rotate said blade member on said mandrel while said inner surface of said flange portion is in engagement with said mandrel facet and the outer surface of said flange portion is in engagement with said abrasive structure to abrasively shape and form facets on said inner and outer surfaces of said flange portion to provide an annular shaving edge on said blade member.

Dependencies are inferred from the claim text.

Facts

Application: 08/399,624Filed 7 Mar 1995 · division
Priority: 17 May 1994
Granted: 20 Feb 1996
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

B26B 21/20
Safety razors with one or more blades arranged transversely to the handle: involving blades with more than two cutting edges; involving disc blades
B26B 21/222
Involving several blades to be used simultaneously: with the blades moulded into, or attached to, a changeable unit
B26B
Hand-held cutting tools not otherwise provided for