Resources Contact Us Home
Apparatus for creating a concave surface from a spectacle blank

Image Number 8 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
Lithographic apparatus and device manufacturing method
Apparatus and method for phase synchronization in radio frequency transmitters
Continuous geospatial tracking system and method
Ultrathin fluid-absorbent cores
Medical imaging probe with rotary encoder
Server-side connection resource pooling
Method, system, and computer program product for scoring theoretical peptides
  Randomly Featured Patents
Electric incandescent lamp
Collector for dog droppings
Integrated circuit with multiple gate dielectric structures
Touch sensing device and method
Lateral positioning detecting apparatus for moving body
Glow plug with protective coating
Solid polymer electrolytes
Oxynitride glass, method of preparing the same and glass fiber
Bag dispensing system
Systems and methods for in-vivo and optical imaging and measurement