Stock material or miscellaneous articles – Circular sheet or circular blank
Reexamination Certificate
2011-03-29
2011-03-29
Mulvaney, Elizabeth (Department: 1785)
Stock material or miscellaneous articles
Circular sheet or circular blank
C428S064400, C430S270110
Reexamination Certificate
active
07914870
ABSTRACT:
A limited-life storage medium comprises a flowable agent. In one example, the storage medium is an optical disc. In a ready-to-read condition, the center of mass of the disc does not coincide with the center of rotation. When the disc is read, the unbalanced rotation of the disc causes vibration that migrates the flowable agent into contact with a metal data-carrying layer, where the flowable agent interferes with the readability of the data so as to limit the useful life of the disc. The movement of the flowable agent improves the balance of the disc, and reduces the vibration.
REFERENCES:
patent: 6011772 (2000-01-01), Rollhaus et al.
patent: 6468619 (2002-10-01), Larroche
patent: 2005/0195728 (2005-09-01), Larroche
ECMAStandard ECMA-267, 3rdEdition, Apr. 2001-pp. 1-86.
Drinker Biddle & Reath LLP
FDD Technologies sa/ag, Ltd.
Mulvaney Elizabeth
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