Apparatus and method for testing mechanical endurance of a...

Details Apparatus and method for testing mechanical endurance of a... Apparatus and method for testing mechanical endurance of a...

2005-04-05

2005-04-05

Lefkowitz, Edward (Department: 2855)

Measuring and testing

By abrasion, milling, rubbing, or scuffing

C073S15000R

Reexamination Certificate

active

06874350

ABSTRACT:
An apparatus and method for testing mechanical endurance of a surface of an optical disc are disclosed. The apparatus includes a rotating plate, on which an optical disc to be scratched is loaded, for rotating the loaded optical disc, and a plurality of abrasion wheels of a predetermined type, disposed at a perpendicular to the rotating plate, for contacting the optical disc and generating the scratch, the scratch being generated when the optical disc rotates a predetermined number of turns, e.g., a maximum of 5 turns for the abrasion wheels to apply a predetermined load on the optical disc.

REFERENCES:
patent: 4958511 (1990-09-01), Marcus
patent: 5074983 (1991-12-01), Eltoukhy et al.
patent: 5557039 (1996-09-01), Annis et al.

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