Patent ID: 7022195
Filing Date: 2006-04-04
Classification: B26B,Y10T

Abstract:
1. A method of fabricating an inner cutter for a dry shaver, said inner cutter having a number of blades in shearing engagement with an outer cutter for cutting hairs, said method comprising: providing a flat metal plate having a length and a width; forming a plurality of parallel straight slits in said plate to leave an array of straight beams each defined between the adjacent ones of said straight slits, and to leave a frame around the array of said straight beams; forging and grinding at least a segment of said beams to give cutting edges extending along said segment; bending said metal plate into a generally U-shaped configuration so as to correspondingly curve said beams and shape said segments into said blades each having an arcuate contour and said cutting edges extending along said arcuate contour; and forming on said frame a joint for connection with a driving source of moving said inner cutter relative to said outer cutter, wherein said cutting edges of said segments are formed through: placing said metal plate between a die and a punch; forging said segments simultaneously by compacting the segments between said die and said punch to form on opposite undersurfaces of each segment rake faces oriented at an acute angle with respect to a top plane of said metal plate, leaving a bulge on top of said segment; and grinding said metal plate to remove said bulges in order to leave on top of each said segment a relief face which crosses with said rake faces at said acute angle to define therebetween said cutting edges.