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
Image processing apparatus and image processing method
Closed cell culture system
Image processing unit, image processing method and program
Control system for shifting an automatic transmission
Audio and music data transmission medium and transmission protocol
  Randomly Featured Patents
Organosilicone polymer solutions
Method of forming membrane electrode assemblies for electrochemical devices
Inking system for lithographic offset printing machines
Continuous tuning arrangement for a multiband television receiver
Signal processing device and process and electrical apparatus comprising such a device
Solid ink stick for an ink jet printer
Method and apparatus for providing startup power to a genset-backed uninterruptible power supply
Hanger assembly for ice skates
Aiming post light
Antenna housing