Masking of heads; Selecting or switching of heads between operative and inoperative functions ; Masking of beams, e.g. of light beams

Introduced: September 1968

Title

Titles differ between systems:

IPC: Masking of heads; Selecting or switching of heads between operative and inoperative functions; Masking of beams, e.g. of light beams

CPC: Masking of heads; Selecting or switching of heads between operative and inoperative functions ; Masking of beams, e.g. of light beams

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 > Control of operating function, e.g. switching from recording to reproducing > Masking of heads; Selecting or switching of heads between operative and inoperative functions; Masking of beams, e.g. of light beams

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) > Control of operating function, e.g. switching from recording to reproducing > Masking of heads; Selecting or switching of heads between operative and inoperative functions ; Masking of beams, e.g. of light beams

Of 2 combined children, 1 exist in both systems.

1 codes are CPC-only extensions.

Child Classifications

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G11B 15/125 CPC only CPC only
G11B 15/14 Masking or switching periodically, e.g. of rotating heads IPC+CPC Available in IPC and CPC