SHEAR FOIL FOR A DRY SHAVER

摘要

A shear foil for a dry shaver has a flexible sheet material body a central portion of which is provided with holes of a diameter between substantially 0.3 and 0.7 millimeters for the passage of beard stubble, and peripheral portions of which serve as mounting portions and are provided with holes of a diameter smaller than those in the central portion but not less than substantially 0.02 millimeters. The holes in the respective portions are separated by sheet material strips whose dimensions are so selected that the bending resistance of the shear foil body is substantially uniform throughout and that the portions of the body can withstand the maximum expected tensile and pressure forces.