DIFF Subgroup
G11B 21/04 Automatic feed mechanism producing a transducing traverse of the head in a direction which cuts across the direction of travel of the recording medium, e.g. helical scan
Introduced: September 1968
Full Title
Head arrangements not specific to the method of recording or reproducing > Driving or moving of heads > Automatic feed mechanism producing a transducing traverse of the head in a direction which cuts across the direction of travel of the recording medium, e.g. helical scan
CPC subdivides this area 3x more granularly than IPC with 2 additional codes.
2 codes are CPC-only extensions.
Child Classifications
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- G11B 21/06 the record carrier having means to ensure traverse movement of the head IPC+CPC Available in IPC and CPC