Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Roll of continuous web of optical film laminate and production method therefor
Remote ignition system for a vehicle and method for securing a remote ignition function
Permitting access of slave device from master device based on process ID's
Parallel active optical cable
Collating device, collating method, and program
Wrench
Control of an electric machine
  Randomly Featured Patents
Method and apparatus for spacecraft antenna beam pointing correction
Battery cell feedthrough apparatus
Removable spacer technology using ion implantation for forming asymmetric MOS transistors
Methods for transferring a communication session between companion devices
Azeotrope-like compositions of dichloropentafluoropropane and methylpentane
Method for processing hydrocarbon pyrolysis effluent
Gravity fed dispenser for soft drink cup lids and the like
Bioengineered tissue constructs and methods for producing and using thereof
Matching system of electronic device and peripheral device and matching method thereof
Implantable device with radiopaque ends