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
Key management policies for cryptographic keys
Modified continuous phase modulation communications system and related methods
Resin composition and molded article
Therapeutic rinse in a self-heating package
Coupling device having piercing member
In-vehicle communication system and method of operation
Tool box
  Randomly Featured Patents
Protein chips for HPV detection
System and method for navigating documents
Water soluble compositions for preparing analytical solutions
Support bearing for automotive vehicles
Sports hat
Method and apparatus for down-loading instructions from a host computer system to a memory in a peripheral controller for execution by a core microprocessor in the peripheral controller
Virtual machine testing
Aromatization reactions with zeolites containing phosphorus oxide
Control system for a fuel cell vehicle having an exhaust hydrogen combustor
Fence panel including a connector system for interconnecting multiple panels