초록 ▼

A cutter unit for a rotary shaver includes a series of cutters arranged in at least two rings around a central axis of a cutter unit. The rings are formed by forming two cutter discs, each with a plurality of cutters, and by nesting the discs, one into the other, in such way that their combined cutt

A cutter unit for a rotary shaver includes a series of cutters arranged in at least two rings around a central axis of a cutter unit. The rings are formed by forming two cutter discs, each with a plurality of cutters, and by nesting the discs, one into the other, in such way that their combined cutters form the at least two rings.

대표청구항 ▼

1. A cutter unit for a rotary shaver, the cutter unit comprising at least two cutter discs for cutting hair having a plurality of cutters, wherein a first disc of the at least two cutter discs has two cutter rings, and a second disc of the at least two cutter discs has only a single cutter ring, and

1. A cutter unit for a rotary shaver, the cutter unit comprising at least two cutter discs for cutting hair having a plurality of cutters, wherein a first disc of the at least two cutter discs has two cutter rings, and a second disc of the at least two cutter discs has only a single cutter ring, and wherein a diameter of the single cutter ring is larger than diameters of the two cutter rings of the first disc so that the first disc is nested in the second disc to form a composite cutter unit where the plurality of cutters are arranged in three concentric cutter rings, wherein an outer ring of the two cutter rings of the first disc comprises more cutters than an inner ring of the two cutter rings of the first disc. 2. The cutter unit according to claim, 1, wherein the two rings of the first disc are formed by bending some of the cutters of the first disc more outward and/or inward than others. 3. The cutter unit according to claim 1, wherein the at least two cutter discs are of substantial cup-shaped design, each having a central base surrounded by at least one ring of cutters, said cutters extending substantially upright from said central base. 4. The cutter unit according to claim 1, wherein a number of cutters are different per ring. 5. The cutter unit according to claim 1, wherein the two cutter rings of the first disc are configured to provide alternating inner and outer cutters that extend from only one of an outer perimeter and an inner perimeter of the first disc. 6. The cutter unit of claim 1, further comprising a hair pulling member for pulling the hair for cutting by the at least two cutter discs. 7. The cutter unit of claim 1, further comprising a cap for accommodating the at least two cutter discs, wherein the cap has round hair-entry apertures and slit-shaped hair-entry apertures. 8. The cutter unit of claim 7, wherein the round hair-entry apertures are located near a center of the cap, and the slit-shaped hair-entry apertures are located near a circumferential edge of the cap. 9. A rotary shaver comprising at least one cutter unit, the cutter unit comprising at least two cutter discs for cutting hair having a plurality of cutters, wherein a first disc of the at least two cutter discs has two cutter rings, and a second disc of the at least two cutter discs has only a single cutter ring, and wherein a diameter of the single cutter ring is larger than diameters of the two cutter rings of the first disc so that the first disc is nested in the second disc to form a composite cutter unit where the plurality of cutters are arranged in three concentric cutter rings, wherein an outer ring of the two cutter rings of the first disc comprises more cutters than an inner ring of the two cutter rings of the first disc. 10. The rotary shaver of claim 9, further comprising a hair pulling member for pulling the hair for cutting by the at least two cutter discs. 11. The rotary shaver of claim 9, wherein the two cutter rings of the first disc are configured to provide alternating inner and outer cutters that extend from only one of an outer perimeter and an inner perimeter of the first disc. 12. A method for making a cutter unit for a rotary shaver, comprising the acts of: forming at least two cutter discs for cutting hair;providing each of the at least two cutter discs with a plurality of cutters to be arranged in rings of different diameters;nesting the at least two cutter discs so as to form a composite cutter unit with at least two concentric rings of cutters,wherein a first disc of the at least two cutter discs has two cutter rings, and a second disc at least two cutter discs has only a single cutter ring, and wherein a diameter of the single cutter ring is larger than diameters of the two cutter rings of the first disc so that the first disc is nested in the second disc to form a composite cutter unit where the plurality of cutters are arranged in three concentric cutter rings, wherein an outer ring of the two cutter rings of the first disc comprises more cutters than an inner ring of the two cutter rings of the first disc. 13. The method according to claim 12, wherein each cutter disc is formed by the acts of: cutting a blank so as to comprise a plurality of integrally connected arms and cutters; andbending the connected arms so as to arrange the plurality of cutters into a desired position. 14. The method according to claim 13, wherein the blanks form part of a continuous strip, in which the at least two cutter discs remain attached up till the nesting act, so that the strip serves to guide the at least two cutter discs along the acts of cutting and bending. 15. The method of claim 12, further comprising the act of providing a hair pulling member for pulling the hair for cutting by the at least two cutter discs. 16. The method of claim 12, wherein the two cutter rings are configured to provide alternating inner and outer cutters that extend from only one of an outer perimeter and an inner perimeter of the first disc.