Spectacle lens edge grinding machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 20, 1997
Grant Date -
N/A
app pub date -
Dec 22, 1995
filing date -
Jun 24, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A spectacle lens edge grinding machine includes a machine frame and at least one grinding wheel connected to the machine frame. A rotatable spectacle lens holding shaft is fastened to the machine frame. The spectacle lens holding shaft is at least radially displaceable relative to the grinding wheel. A spectacle lens is secured to the spectacle lens holding shaft for grinding with the grinding wheel. At least one abutment is provided for contacting a spectacle lens having been ground to have a desired spectacle lens contour. A transducer for measuring at least one actual value of the spectacle lens contour relative to the at least one abutment is provided. A computer for controlling the spectacle lens edge grinding machine is provided, wherein the computer includes a memory in which nominal values of the spectacle lens contour are stored. The computer compares the at least one actual value to the nominal values in order to determine a deviation from the nominal values. The memory stores a programmable threshold value for the deviation and the computer controls an additional grinding step when the deviation surpasses the threshold value.
First Claim
Family
International Classification(s)
Cited Art Landscape
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