Resources Contact Us Home
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
Data distribution unit for vehicle entertainment system
Method and system for fail-safe call survival
Server system and method for discovering digital assets in enterprise information systems
Particulate filter with hydrogen sulphide block function
Magnetic memory element, driving method for same, and nonvolatile storage device
Case for a tablet computer
Processing data using information embedded in a data request
  Randomly Featured Patents
Identification of software configuration data
Jobstream planner considering network contention and resource availability
Water wave absorber
Split slitter
Vehicular tail light
Adjustable height vehicle roll-over bar
Self-compensating A-D converter
Mountable interactive toy animal
Water cooled plastic oil pan
Selective copper-silicon-nitride layer formation for an improved dielectric film/copper line interface