Coating processes – Direct application of electrical – magnetic – wave – or... – Pretreatment of substrate or post-treatment of coated substrate
Reexamination Certificate
2006-04-18
2006-04-18
Jolley, Kirsten (Department: 1762)
Coating processes
Direct application of electrical, magnetic, wave, or...
Pretreatment of substrate or post-treatment of coated substrate
C427S129000, C427S130000, C427S131000, C427S162000, C427S177000, C427S261000, C427S271000, C427S275000, C427S289000, C427S307000, C427S356000, C427S371000, C427S407100, C427S419200
Reexamination Certificate
active
07029726
ABSTRACT:
The systems, methods and products of the invention include systems and methods for manufacturing servo tracks on a magnetic tape. In one aspect, the invention includes systems for manufacturing magnetic tapes having servo tracks thereon wherein the servo tracks are optically detectable and are capable of being processed by a servo control system for maintaining alignment of a magnetic recording head with the data tracks on the recording side of the magnetic tape. In one practice, the manufacturing systems described herein engrave the servo tracks onto the non-recording side of a magnetic tape by directing a laser beam at the non-recording side of the magnetic tape. In another practice, the manufacturing systems described herein engrave the servo tracks onto the magnetic side of a magnetic tape by directing a laser beam at the magnetic side of the magnetic tape. Such engraved patterns can act as optical servo tracks for maintaining alignment of the recording head with the data tracks on the magnetic tape.
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Cappabianca Leo
Chen Hong
Lee Tzuo-Chang
Panish Joseph M.
Jolley Kirsten
Morrison & Foerster / LLP
Quantum Corporation
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