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
Interference suppressing OFDM system for wireless communications
Data architecture and user interface for plasma processing related software applications
Hybrid CMOS nanowire mesh device and PDSOI device
Antenna support device
Method for dropping packet data, radio communication device, and mobile communication system
Hybrid fiber constructions to mitigate creep in composites
Information processing apparatus and update information obtainment method
  Randomly Featured Patents
Polysilicon resistors and methods of fabrication
Use of norbornyl oxyacetaldehyde in augmenting or enhancing the aroma of detergents
Fiber-optic probes and methods of measuring biological materials
Millimeter-wave interrogation relating features
Electric rotating machine capable of reducing performance deterioration due to discharge
Collapsible cable dispensing dolly
Nozzle for injection lance
Admission control method
Protective packaging for thermolabile goods using compounds with melting points slightly below thermosensitive temperature of the goods
Liquefier process