Cutting members for shaving razors
View Patent ↗Cutting members for razors are provided that have a blade portion and a base portion, the blade portion having a cutting edge region terminated at a free end thereof and an opposing non-cutting edge region, the blade portion being bent relative to the base portion in a bent portion spaced from the cutting edge region and adjacent to the non-cutting edge region, wherein the bent portion extends about 108 degrees to about 115 degrees from the base portion, the bent portion having a radius of about 0.30 mm to about 0.45 mm, at least part of the cutting member having a hardness of about hardness of about 540 HV to about 750 HV, and a thickness of the bent portion is less than the average thickness of the cutting member.
1. A cutting member for a shaving razor, the cutting member comprising:
a blade portion and a base portion, the blade portion having a cutting edge region terminated at a free end thereof and an opposing non-cutting edge region, the blade portion being bent relative to the base portion in a bent portion spaced from the cutting edge region and adjacent to the non-cutting edge region, wherein the bent portion extends about 108 degrees to about 115 degrees from the base portion, the bent portion having a radius of about 0.30 mm to about 0.45 mm, at least part of the cutting member having a hardness of about 540 HV to about 750 HV, and a thickness of the bent portion is less than the average thickness of the cutting member, wherein the thickness of the bent portion is less than a thickness of the base portion and a thickness of the non-cutting edge region.
2. The cutting member of claim 1 , wherein a length of the blade portion is about 0.82 mm to about 1.49 mm.
3. The cutting member of claim 1 , wherein the blade portion has a wedge-shaped configuration with an ultimate tip radius less than 1000 angstroms.
4. The cutting member of claim 1 , wherein the blade portion has a bow of about +0.01 mm to about −0.05 mm across the length of the blade portion.
5. The cutting member of claim 1 , wherein the blade portion has a sweep of about +/−0.07 mm across the length of the blade portion.
6. The cutting member of claim 1 , wherein the base portion has a bow of about +/−0.060 mm across the length of the base portion.
7. The cutting member of claim 1 , wherein the cutting member is formed of a metal comprising about 0.35 percent to about 0.43 percent carbon, about 0.90 percent to about 1.35 percent molybdenum, about 0.40 percent to about 0.90 percent manganese, about 13 percent to about 14 percent chromium, no more than about 0.030 percent phosphorus, about 0.20 percent to about 0.55 percent silicon, and no more than about 0.025 percent sulfur.
8. A shaving razor cartridge comprising:
a housing carrying a guard, a cap;
a cutting member mounted to the housing, wherein the cutting member comprises a blade portion and a base portion, the blade portion having a cutting edge region terminated at a free end thereof and an opposing non-cutting edge region, the blade portion being bent relative to the base portion in a bent portion spaced from the cutting edge region and adjacent to the non-cutting edge region, wherein the bent portion extends about 108 degrees to about 115 degrees from the base portion, the bent portion having a radius of about 0.30 mm to about 0.45 mm, at least part of the cutting member having a hardness of about 540 HV to about 750 HV, and a thickness of the bent portion is less than the average thickness of the cutting member, wherein the thickness of the bent portion is less than a thickness of the base portion and a thickness of the non-cutting edge region.
9. The shaving razor cartridge of claim 8 wherein at least three cutting members are mounted to the housing, each cutting member having a blade portion and a base portion, the blade portion having a cutting edge region terminated at a free end thereof and an opposing non-cutting edge region, the blade portion being bent relative to the base portion in a bent portion spaced from the cutting edge region and adjacent to the non-cutting edge region, wherein the bent portion extends about 108 degrees to about 115 degrees from the base portion, the bent portion having a radius of about 0.30 mm to about 0.45 mm, at least part of each of the cutting members having a hardness of about 540 HV to about 750 HV, and a thickness of the bent portion is less than the average thickness of the respective cutting member.
10. The shaving razor cartridge of claim 8 , wherein the blade portion has a wedge-shaped configuration with an ultimate tip radius less than 1000 angstroms.
11. The shaving razor cartridge of claim 8 , wherein a length of the blade portion is about 0.82 mm to about 1.49 mm.
12. The shaving razor cartridge of claim 8 , wherein the blade portion has a bow of about +0.01 mm to about −0.05 mm across the length of the blade portion.
13. The shaving razor cartridge of claim 12 , wherein the blade portion has a sweep of about +/−0.07 mm across the length of the blade portion.
14. The shaving razor cartridge of claim 8 , wherein the base portion has a bow of about +/−0.060 mm across the length of the base portion.
15. The shaving razor cartridge of claim 8 , wherein the cutting member is formed of a metal comprising about 0.35 percent to about 0.43 percent carbon, about 0.90 percent to about 1.35 percent molybdenum, about 0.40 percent to about 0.90 percent manganese, about 13 percent to about 14 percent chromium, no more than about 0.030 percent phosphorus, about 0.20 percent to about 0.55 percent silicon, and no more than about 0.025 percent sulfur.