Abstract: A cutter head for an electric shaver comprises an outer shearing foil provided with a series of hair entrance slots arranged in a row. Cooperating with the outer shearing foil is an inner cutter assembly which includes at least one inner blade having a cutting edge elongated in a general direction of the length of each slot and is driven to move in relation to the shearing foil so that the cutting edge is in hair shearing relation with the row of the slots. Formed with the inner blade is a hair scooping projection which projects in a general direction of the movement of the cutting edge and define a sloping edge extending downwardly and outwardly from the cutting edge such that a long hair strands entering the slots can, as the inner blade advances, be slid or guide along the sloping edge up to the cutting edge where the strand is successfully sheared against the edge of the slot.

Abstract: An inner cutter for electric shavers is disclosed. The inner cutter comprises a plurality of inner blades mounted on a base member to be driven to move in sliding engagement with an outer shearing plate having a number of perforations therein. Each inner blade has along its length the cutting edge of different configurations including at least a toothed edge so as to define a first cutting edge of a greater overall width determined by the amount of projection of the tooth in the direction of movement of the inner blade and a second cutting edge in the form of a straight edge or toothed edge of an overall width less than that of the first cutting edge. The first cutting edge is responsible for efficiently capturing and cutting long hairs into shorter ones, while the second cutting edge is for giving a close shave on the skin of a user. Accordingly, the long hairs can receive two different cutting operations at each inner blade so as to be in a close cut after being successfully captured.

Abstract: Reciprocal blade assembly of electric shaver having means for positively shaving specifically such long beard hair as ones extending along user's face skin or curling which are hard to shave, in addition to ordinary beard hair easy to shave. The means comprises an elongated bent part and slit-shaped hair inlet apertures made in an outer blade of a flexible steel foil fixed as bent semicylindrically to the shaver's head, the bent part being parallel to the longitudinal axis of the blade and the slit-shaped apertures substantially transversing the bent part, and an undulated part corresponding to the bent part and made in respective arcuate cutting blade edges of an inner cutter driven reciprocally to slide at the edges along the inner surface of the outer blade.

Abstract: A rotary type electric shaver, having an inner cutter and a shaving head mounted thereover; the inner cutter including a rotatable base having receiving slits radially about its axis of rotation; the inner cutter also including a cutter blade inserted in each receiving slit, each cutter blade having a cutting edge and a leg portion, the leg portion terminating in a distal edge having at least one receiving notch and a receiving hole, the receiving hole being located closer to the axis of rotation of rotatable base than that receiving notch; the inner cutter also including a spring assembly for each receiving slit, each spring assembly having at least two spring portions, one end of each spring portion being fixed to the lower surface of the rotatable base, the other end of one of the spring portions engaging the receiving hole and exerting a downward force thereon, the end of the other spring portion engaging the receiving notch and exerting an upward force thereon; the shaving head including a thin, perforat