Patent ID: 6702657
Filing Date: 2004-03-09
Classification: B24B

Abstract:
A machine for polishing workpieces, comprisinga frame having a disc-shaped polishing table mounted thereon for rotation coaxially about a vertical axis, said table having thereon an upper, generally planar polishing surface for supporting for rotation thereon a plurality of circular workpiece carriers, means connected to said table and operable to rotate said table in a predetermined direction about said axis, a main shaft secured to and projecting coaxially above said table for rotation therewith in said predetermined direction, a plurality of rigid arms supported on said frame above said table to extend radially inwardly of said table in angularly spaced relation to each other, and over said upper surface of said table, in vertically spaced relation thereto, each of said arms having a carrier drive shaft mounted therein for rotation about an axis extending parallel to and radially spaced from the axis of said table, each of said drive shafts having an upper end extending above and a lower end extending beneath the respective arm in which it is mounted, drive means connecting the upper ends of said drive shafts to said main shaft for rotation thereby in unison, and a drive roller secured to the lower end of each of said drive shafts and disposed to be engaged with one of said circular workpiece carriers to impart rotation thereto relative to said table.