Device for polishing digital storage discs

Abrading – Machine – Rotary tool

Reexamination Certificate

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Details

C451S288000, C451S290000, C451S291000

Reexamination Certificate

active

06840847

ABSTRACT:
A device for polishing digital storage discs including a polishing plate rotatably driven about a vertical axis, the upper side of which has a polishing cloth, wherein the polishing cloth is interrupted by a ring-shaped recess concentric with the axis of the polishing plate, at least one circular load-applying plate from the planar lower side of which a projection centrally protrudes to appropriately engage the central hole of the storage disk, a roller holder which has at least one idling roller and one driven roller against which the circumference of said load-applying plate gets into engagement when said plate is carried along while lying on said polishing plate, a drive for said driven roller, and mechanism for feeding a polishing medium to said polishing cloth.

REFERENCES:
patent: 5123218 (1992-06-01), Karlsrud
patent: 6033522 (2000-03-01), Iwata et al.
patent: 6280296 (2001-08-01), Sato et al.
patent: 6594848 (2003-07-01), Lee
patent: 20020172124 (2002-11-01), Weng
patent: 20030124962 (2003-07-01), Lee
patent: 20030129932 (2003-07-01), Ficarro
patent: 20030181141 (2003-09-01), Taniguchi et al.

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