Method of marking and detecting disc index

Details Method of marking and detecting disc index Method of marking and detecting disc index

2005-05-03

2005-05-03

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

C356S400000

Reexamination Certificate

active

06888154

ABSTRACT:
The present invention allows placement of a disc at an angular orientation by marking the disc with an index mark or feature that can be detected, such as by a disc stacking machine used in a servo track writer. Either index is used to rotate the disc to the angular position. The present invention includes marking a disc surface with a mark or feature. An apparatus, such a stacking machine, will read the mark or feature to orient the disc in an angular position. The stacking machine will stack the positioned discs for servo track writing.

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