Patent EA-002735-B1 (EA)
Title: Method of manufacturing a cutter member having an auxiliary layer
Inventor: ALTENA HERMANUS S J
IPC: C25F3/00
Filed: 1999-12-14
Abstract: 1. A method of manufacturing a cutting member comprising plate-shaped carrier providing an auxiliary layer only on one side of the plate-shaped carrier, then providing said plate-shaped carrier with at least one cutting edge by means of an electrochemical processing device, said plate-shaped carrier being arranged in such a manner with respect to an electrode of the electrochemical processing device that the auxiliary layer faces away from the electrode, said auxiliary layer being preserved, after provision of the cutting edge, as a functional auxiliary layer for said plate-shaped carrier, characterized in that that the auxiliary layer has a thickness less than 200 nm said auxiliary layer being applied as far as the cutting edge to be provided on the plate-shaped carrier. 2. A method as claimed in claim 1, characterized in that the auxiliary layer comprises SiO2. 3. A method as claimed in claim 2, characterized in that the auxiliary layer also comprises ZrO2. 4. A method as claimed in claim 1, characterized in that the auxiliary layer has a thickness 100 nm. 5. A method as claimed in claim 1, characterized in that the cutting member is plate-shaped and is provided with a substantially straight cutting edge. 6. A method as claimed in claim 5, characterized in that a first wedge-shaped part situated at a distance from the cutting edge is formed on the side of said cutting member by means of a mechanical material-removing device, then, providing said side, layer a second wedge-shaped part having a relatively small wedge angle is formed by means of the electrochemical processing device, said second wedge shaped part extending between the cutting edge and said first wedge-shaped part. 7. A method as claimed in claim 6, characterized in that the wedge angle of the first wedge-shaped part ranges between 15 degree  and 30 degree , while the wedge angle of the second wedge-shaped part ranges between 30 degree  and 60 degree . 8. A cutting member comprising a plate-shaped carrier provided with a cutting edge, said carrier provided, only on one side, with an auxiliary layer, characterized in that the auxiliary layer has a thickness less than 200 nm, said auxiliary layer extending as far as the cutting edge. 9. A cutting member as claimed in claim 8, characterized in that the auxiliary layer comprises SiO2. 10 A cutting member as claimed in claim 9, characterized in that the auxiliary layer also comprises ZrO2. 11. A cutting member as claimed in claim 8, characterized in that the auxiliary layer has a thickness less than 100 nm. 12. A cutting member as claimed in claim 8, characterized in that providing a side of said cutting member, remote from the auxiliary layer, with a first wedge-shaped part having a relatively small wedge angle, by means of a mechanical material-removing device, said first wedge-shaped part situated at a distance from the cutting edge, then, providing said side, remote from the auxiliary layer, with a second wedge-shaped part having a relatively large wedge angle, said second wedge shaped part extending between the cutting edge and said first wedge-shaped part. 13. A cutting member as claimed in claim 12, characterized in that that the wedge angle of the first wedge-shaped part ranges between 15 degree  and 30 degree , while the wedge angle of the second wedge-shaped part ranges between 30 degree  and 60 degree . 14. A shaving head comprising a cutting member, which is provided with a carrier and a cutting edge for cutting hairs growing from skin, and a manipulator by means of which, in use, hairs can be moved along the cutting edge of the cutting member during cutting, the cutting edge of the cutting member and the manipulator adjoining each other and being displaceable relatively to each other in a direction parallel to the cutting edge, characterized in that the cutting member is a cutting member as claimed in any of claims 8 to 13, the auxiliary layer of the cutting member facing the manipulator. 15. A shaver comprising a shaving head provided with a cutting member, which is provided with a carrier and a cutting edge for cutting hairs growing from skin, and a manipulator by means of which, in use, hairs can be moved along the cutting edge of the cutting member during cutting, the cutting edge of the cutting member and the manipulator adjoining each other, and the shaver being provided with a driving device for displacing the cutting member and the manipulator of the shaving head with respect to each other in a direction parallel to the cutting edge, characterized in that the shaving head is a shaving head as claimed in claim 14.