Dynamic magnetic information storage or retrieval – Record transport with head moving during transducing – Tape record
Patent
1978-01-26
1979-07-31
Eddleman, Alfred H.
Dynamic magnetic information storage or retrieval
Record transport with head moving during transducing
Tape record
360107, 36013021, G11B 552, G11B 1560, G11B 2118
Patent
active
041632664
ABSTRACT:
Guiding drums for a magnetic tape scanning assembly for use in a video tape recorder and playback apparatus are made of a specific aluminum-silicon alloy consisting essentially of 8 to 15% by weight of silicon, 1 to 4% by weight of copper, 0.05 to 0.6% by weight of magnesium, and the balance being aluminum. A mean grain size of silicon crystal in eutectic structure is controlled to be 5 .mu.m or less. The drums are provided with a diagonal or helical guiding path on the peripheries thereof in which there are formed on the guiding path generally continuous, fine machining lines having a roughness (H max) of 1 to 6 .mu.m, preferably 2 to 5 .mu.m, in a direction parallel with sliding travel of a magnetic tape.
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Asahi Naotatsu
Kasai Masataka
Nakayama Makoto
Saito Akira
Tamamura Takeo
Eddleman Alfred H.
Hitachi , Ltd.
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