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










Image Number 6 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
Unsupervised document clustering using latent semantic density analysis
Quantifying the risks of applications for mobile devices
Metal-doped oxide, method of preparing the same, and solid oxide electrolyte using the metal-doped oxide
Methods and arrangements for realising betting with off-line terminal
Information processing apparatus, information outputting method and computer program storage device
Automated hotfix handling model
Scoring records for sorting by user-specific weights based on relative importance
  Randomly Featured Patents
Solid-state image sensor
Brain specific potassium channel protein
Medical apparatus with remote virtual input device
CPU interconnect system for a computer
D.C. Rotary machine with interpole compensation
Method and apparatus for microwave phosphor synthesis
Fuser belts with adhesion promoting layer
Terminal device in document information communication system
Method and device for measuring the quantity of water dampening the face of an offset printing plate
Techniques for arranging solder balls and forming bumps