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
Methods and kits for predicting the responsiveness of hepatocellular carcinoma patients to 5-fluorouracil-based combination chemotherapy
Carbonyl-ene functionalized polyolefins
Contact sensor, driver device, and care bed
Vehicle location information-based abnormal driving determination and warning system
Voltage generating system and memory device using the same
Apparatus and methods for color displays
Image-processing method and program, and image-processing apparatus
  Randomly Featured Patents
Heteroaromatic phthalonitriles
Prefabricated shingle panel
Woodburning stove with economizer
Semiconductor device with a selection gate and a peripheral gate
Switching accessory for use with motor starters
Car seat blanket
Handle mounting means for power driven vacuum cleaner
Protective casing for electrical devices
Nozzle plate member for supplying fluids in dispersed manner and manufacturing method of the same
System and method for timed order entry and modification