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US 4,969,296 AGranted
Apparatus of surface grinding of planar member
AssigneeNippon CMK Corp.
InventorsKameharu Seki, Isamu Kubo
Life of this patent
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Abstract
An apparatus for surface grinding a planar surface of an article comprises a two-stage grinding head having an upstream-stage grinding brush and a downstream-stage grinding stone. The article is advanced past the grinding head while the grinding head is eccentrically driven so that the grinding brush coarsely grinds the planar surface and forms therein spiral brush traces and the grinding stone finely grinds the coarsely ground planar surface to smoothen the brush traces.
Claims14
An apparatus for surface grinding a member having a generally planar surface, comprising:
- a two-stage grinding head having upstream grinding means for coarsely grinding a generally planar surface of a member and downstream grinding means for finely grinding the coarsely ground planar surface;
- and means for moving the first and second grinding means in eccentric motions relative to the planar surface.
Dependencies are inferred from the claim text.