Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Particulate filter with hydrogen sulphide block function
High pressure refolding of protein aggregates and inclusion bodies
Ejection station
Device, system, and method for logging near field communications tag interactions
System and method for confirming delivery of an electronic message
Tag-based apparatus and methods for neural networks
Method of operating an election ballot printing system
  Randomly Featured Patents
Method of manufacturing a fluid ejector head
Symbol display device for game machine
Method and system for rapidly changing the source of material supplied to a destination
Lacrosse head
Method and system for enabling a file server to service multiple networks of the same network protocol family by invoking multiple instances of a network session protocol
Organizer assembly for removable attachment to a ringed notebook or ringed binder
User interface design and evaluation system and hand interaction based user interface design and evaluation system
Cargo box tailgate assembly
Handheld terminal
System and method for managing a plurality of local lists of a single user