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US 4,081,927 AGranted
Apparatus for grinding a rabbet in an edge of a glass sheet
AssigneePPG Industries, Inc.
InventorJoseph B. Kelly
Life of this patent
Estimating the term…
Abstract
A wheel having a plurality of spaced grinding pads is rotated about a vertical axis and displaced toward a glass sheet rotating in a horizontal plane to grind a rabbet in the edge of the glass sheet. The spaced grinding pads reduce frictional heat and provide periodic spacings between the glass sheet and wheel to pass a coolant therebetween to eliminate thermal damage to the glass edge.
Claims4
An apparatus for grinding a recess in marginal edge portions of a glass sheet, comprising:
- means for supporting the sheet;
- a flat disc;
- a circular band of grinding material on a surface of said disc;
- shaft means mounting said disc such that the axial center of said shaft means and plane of said disc subtend an oblique angle;
- means acting on said shaft means for rotating said disc through a circular oscillatory path to move said band of grinding material toward, through and away from a plane generally parallel to said supporting means;
- and
- means for decreasing the distance between said band of grinding material and said supporting means as said disc is rotated.
4 more elements
Dependencies are inferred from the claim text.