Razor blade, razor head, and method of manufacture
AssigneeBic-Violex SA
InventorsVasileios Davos, Vassilis Papachristos, Dimitrios Efthimiadis, Panagiotis Zafiropoulos, Nikolaos Skounakis, Ioannis Komianos, Michalis Karoussis, Anastasios Papageorgiou
Life of this patent
Estimating the term…
Abstract
An integrally formed rigid razor blade having a body with a cutting edge portion extending about a cutting edge portion plane, and having a cutting edge at one end, a base portion extending along a base portion plane, a bent portion intermediate the cutting edge portion and the base portion. The body is made of martensitic stainless steel that includes mainly iron and between 0.62% and 0.75% of carbon in weight.
Claims30
-29. (canceled)
An integrally formed rigid razor blade having a body comprising:
- a cutting edge portion extending about a cutting edge portion plane, and having a cutting edge at one end,
- a base portion extending along a base portion plane,
- a bent portion intermediate the cutting edge portion and the base portion,
- wherein the body includes martensitic stainless steel comprising mainly iron and between 0.62% and 0.75% of carbon in weight.
A razor head comprising:
- a housing having a top face defining a shaving window, and an opposed stopping face, the housing further comprising at least one guide,
- at least one integrally formed rigid razor blade, each freely mounted in the housing, and having:
- a cutting edge portion extending along a cutting edge portion axis, and having a cutting edge accessible through the shaving window,
- a guided portion extending along a guided portion axis, and
- a bent portion intermediate the cutting edge portion and the guided portion,
- wherein the cantilever dimension, measured as the distance between the cutting edge and the guided portion axis, is between 1.1 millimeters and 1.8 millimeters,
- wherein the guided portion cooperates with the guide so that each blade is independently translatable with respect to the housing along a sliding direction parallel to the guided portion axis, under the effect of shaving forces applied to the blade during shaving.
An integrally formed rigid razor blade comprising:
- martensitic stainless steel and having in cross-section:
- a cutting edge portion extending along a cutting edge portion axis, and having a cutting edge at one end,
- a base portion extending along a base portion axis,
- a bent portion intermediate the cutting edge portion and the base portion, the blade having a concave face and an opposed convex face,
- wherein the average radius of curvature of the bent portion at its concave face is between 0.5 millimeters and 1 millimeters.
A method of manufacturing an integrally formed razor blade comprising:
- providing a strip having, in cross-section transverse to a longitudinal axis, a blade portion and a removable portion, wherein weakening holes are provided along the longitudinal axis between the blade portion and the removable portion,
- separating the blade portion from the removable portion by breaking the strip at the weakening holes,
- providing the razor blade with a profile having:
- a cutting edge portion extending along a cutting edge portion axis, and having a cutting edge at one end,
- a base portion extending along a base portion axis, and having an abutment edge at one end,
- a bent portion intermediate the cutting edge portion and the guided portion,
- wherein the abutment edge is corrugated along the longitudinal axis, with corrugations with a height of at most 0.32 millimeters.
An integrally formed rigid razor blade having in cross-section transverse to a longitudinal axis:
- a cutting edge portion extending along a cutting edge portion axis, and having a cutting edge at one end,
- a base portion extending along a base portion axis, and having an abutment edge at one end,
- a bent portion intermediate the cutting edge portion and the guided portion,
- wherein the abutment edge is corrugated along the longitudinal axis, with corrugations with a height of at most 0.32 millimeters.
An integrally formed rigid razor blade strip having in cross-section transverse to a longitudinal axis:
- a cutting edge portion extending along a cutting edge portion axis, and having a cutting edge at one end,
- a base portion extending along a base portion axis,
- a bent portion intermediate the cutting edge portion and the guided portion, and
- a removable portion having a back edge, wherein the base portion is intermediate between the bent portion and the removable portion,
- wherein weakening holes are provided along the longitudinal axis between the base portion and the removable portion.
A method of manufacture of an integral bent blade for a mechanical shaver comprising:
- providing a flat strip of metal extending from a first edge to an opposite edge,
- bending the flat strip along a bending axis parallel to the first edge to result in an integrally bent product having opposed inner and outer faces, and comprising:
- a cutting edge portion extending along a cutting edge portion axis, and having the first edge at one end,
- a base portion extending along a base portion axis, and having the opposite edge at one end,
- a bent portion intermediate the cutting edge portion and the base portion,
- after bending, applying a mechanical stress on the inner face of the bent portion.
Dependencies are inferred from the claim text.