Cutting members for shaving razors
View Patent ↗A cutting member for a shaving razor includes an elongated blade portion that tapers to a cutting edge, an elongated base portion that is integral with the blade portion, and a bent portion, intermediate the blade portion and the base portion. In some implementations, at least part of the cutting member has a thickness of at least about 0.005 inch (0.127 millimeter).
1. A method comprising:
hardening a strip of blade steel;
forming a cutting edge on the hardened strip;
after forming the cutting edge, bending the strip along its length by coining the strip, bending the strip reduces the thickness of the blade steel in the bent portion by at least about five percent relative to an original thickness of the blade steel; and
separating the bent strip into individual blades, each blade having a bent portion.
2. The method of claim 1 , wherein bending the strip comprises using a forming die that is configured so as not to touch the cutting edge.
3. The method of claim 1 , wherein the blade steel comprises about 0.35 to about 0.43 percent carbon, about 0.90 to about 1.35 percent molybdenum, about 0.40 to about 0.90 percent manganese, about 13 to about 14 percent chromium, no more than about 0.030 percent phosphorus, about 0.20 to about 0.55 percent silicon, and no more than about 0.025 percent sulfur.