Shear head of a dry-shaver comprising a shear foil which is clam

Details Shear head of a dry-shaver comprising a shear foil which is clam Shear head of a dry-shaver comprising a shear foil which is clam

1984-10-11

1986-11-11

Watts, Douglas D.

Cutlery

Razors

With cooperating shearing blades

3034651, B26B 1902

Patent

active

046214232

ABSTRACT:
A vibratory dry-shaver comprises a shear foil having two longitudinal edges, and respective means to clamp the two longitudinal edges in place to cause the shear foil to assume a natural curvature, the tangents to such curvature at the two clamping means forming an acute angle with each other. A cutter is reciprocatingly movable along and adjacent to the shear foil, the cutting edge of the cutter having a curvature corresponding to that of the clamped, curved shear foil. The curved shear foil and the cutting edge of the cutter each have a hyperbolic cosine curvature according to the formula:

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