Movable cutter for a dry shaver having saw tooth design cutting edge

Claim 1

A THIN PLATE-LIKE CUTTER ADAPTED FOR USE IN CONNECTION WITH A SHEAR PLATE HAVING A SERIES OF CIRCULAR PERFORATIONS THEREIN, SAID CUTTER HAVING AN END FACE DESIGNED FOR SLIDING CONTACT WITH SAID SHEAR PLATE AND ADAPTED TO TRAVERSE SAID PERFORATIONS, THE LEADING SIDE OF SAID CUTTER BEING FORMED WITH A SERIES OF ELONGATED PARALLEL TROUGHS AND INTERVENING CRESTS WHICH INTERSECT SAID END FACE OF THE CUTTER AND, IN COMBINATION THEREWITH, DEFINE A SHARP LEADING CUTTING EDGE OF ZIG-ZAG CONFIGURATION, THE SIDES OF SAID TROUGHS AND CRESTS BEING PLANAR, THE SIDES OF EACH TROUGH INTERSECTING EACH OTHER TO DEFINE A SHARP TROUGH BOTTOM AND THE SIDES OF EACH CREST INTERSECTING EACH OTHER TO DEFINE A SHARP CREST EDGE WHEREBY SAID LEADING CUTTING EDGE AT THE INTERSECTION OF THE TROUGHS AND CRESTS WITH THE END FACE OF THE CUTTER IS OF SHARP SAW-TOOTH DESIGN, THE LEADING SIDE OF SAID CUTTER BEING UNDERCUT AND INCLINED AT AN OBTUSE ANGLE TO THE DIRECTION OF MOTION OF THE CUTTER WHEREBY SAID PLANAR SIDES APPROACH THE INSIDE SURFACE OF THE SHEAR PLATE AT AN OBTUSE ANGLE, THE LEADING SIDE OF SAID CUTTER BEING PROVIDED WITH AN INCLINED LEDGE IMMEDIATELY BELOW SAID TROUGHS AND CRESTS, THE COMBINED WIDTH OF TWO ADJACENT TROUGHS BEING LESS THAN THE DIAMETER OF THE SHEAR PLATE PERFORATIONS AND THE COMBINED WIDTH OF THREE CONSECUTIVE TROUGHS BEING GREATER THAN THE DIAMETER OF THE SHEAR PLATE PERFORATIONS.