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PCE
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DIFF Subgroup
G11B 15/58

with vacuum column

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function > the record carrier having reserve loop, e.g. to minimise inertia during acceleration > with vacuum column

CPC:

Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function (driving or guiding heads G11B3/00 - G11B7/00, G11B21/00) > the record carrier having reserve loop, e.g. to minimise inertia during acceleration > with vacuum column

No child classifications to compare. This is a leaf node in both IPC and CPC.