Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
System and method for transferring data in storage controllers
Methods, devices and computer program products providing for establishing a model for emulating a physical quantity which depends on at least one input parameter, and use thereof
Printed circuit board including electromagnetic bandgap structure
Droplet generation and detection device, and droplet control device
Redundant power delivery
Data encoding and decoding apparatus and method thereof for verifying data integrity
Illumination unit for a direct-view display
  Randomly Featured Patents
Communication system with link margin control and method
Laser engraving mechanism and engraving method of using the same
Real-time tracking of non-rigid objects in image sequences for which the background may be changing
High accuracy AC electric energy metering system
Method and apparatus for concentrating an aqueous sludge by electro-osmosis
Gear-shift control device and gear-shift control method for automatic transmission
Method and apparatus for video image processing and recording
Valve for an aerosol dispenser
Blocking bodies against vehicles having wheels
Luminogenic and fluorogenic compounds and methods to detect molecules or conditions