Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Apparatus for creating a concave surface from a spectacle blank










Image Number 2 for United States Patent #6227952.

A method for creation of a surface from a rough blank for spectacles is which is suitable for both brittle-hard materials and for plastics uses makes use of a disk-shaped, rotation-symmetrical tool of relatively large diameter, by means of which the material to be taken off the rough blank is removed with high grinding or milling efficiency in at least two work steps--a plunge-cut step and a shaping step with material removed along a spiral path. The outcome of the last work step is a machining path traveling in a spiral from the outside to the inside with low residual apex height and relatively large apex spacing. The resulting surface needs only slight fine-grinding and polishing aftertreatment. As an option, both a rim machining step adapted to the form of the eyeglass frame and a work step faceting the rim of the eyeglasses can be integrated into the method. Furthermore, tools are proposed for carrying out the grinding and milling process.








 
 
  Recently Added Patents
Multi user MIMO detection utilizing averaged spatial whitening
Non-visual presentation of information on an electronic wireless device
Semiconductor element-embedded wiring substrate
Wafer processing method and system using multi-zone chuck
Correlating trace data streams
Chip on film (COF) package having test line for testing electrical function of chip and method for manufacturing same
Implantable neuro-stimulation electrode with fluid reservoir
  Randomly Featured Patents
Bi-directional shift register control circuit
Method and apparatus for measuring air ion concentrations
Stand for plants
Anti-FGF19 antibodies and methods using same
Facsimile machine having recording/reproducing apparatus
Battery pack
Compressor with suction valve in piston
Gene encoding protein from merozoite of Babesia caballi, recombinant protein obtained with said gene and use thereof
Board game having an integrally attached rotating bottle
Method and appartus for making hard copy records of curves including curves which are mathematically described as multi-functions from periodically sampled data points