Resources Contact Us Home
Apparatus for creating a concave surface from a spectacle blank

Image Number 2 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 managing stakeholder impact on sustainability for an organization
Method and device for customizing a mail history
Multidimensional data input interface
Ice bin assembly
Method for electronically controlling a bicycle gearshift and electronically servo-assisted bicycle gearshift
Fast locking phase-locked loop
Enabling user defined network change leveraging as-built data
  Randomly Featured Patents
Contrast agent imaging with agent specific ultrasound detection
Combination spine board and head stabilizer
Follower device with differentiated speeds for gyrocompasses with mechanical suspension
Foam fire extinguishing unit for rescue vehicle
Position controlled drive mechanism
Universal joint cross with adjustable bearing cups
System and method for providing a history list of existing imaging compositions
5 Volt tolerant 3.3 volt output buffer
Method and apparatus for smoothing the output of a hydrostatic transmission near zero speed