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
Storage system, control method therefor, and program
Wireless enclosure
Case for electronic device
System and method of verification of analog circuits
Method of purifying crude acetone stream
Managing a spinlock indicative of exclusive access to a system resource
Liquid crystal display device
  Randomly Featured Patents
Absorbent article with improved liquid-handling ability
Process for producing ammonium p-styrenesulfonate
Emergency escape rope apparatus
Hinge for a vehicle sunroof assembly
Broken-down organic lignin-cellulose silicate polymers
System for and method of connecting a hardware modeling element to a hardware modeling system
Methods and systems for co-channel interference cancellation in wireless networks
Vacuum operated servo
Extendable tailgate ladder assembly
Device for controlling an automatic automotive transmission