Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Synchronizing moving-head moving-record recorders
Patent
1988-11-23
1991-01-15
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Synchronizing moving-head moving-record recorders
360 7305, 360 7308, 360 722, G11B 552, G11B 2104
Patent
active
049857860
ABSTRACT:
An information reproducing apparatus quickly retrieves tape position information of a tape-shaped recording medium on which tracks are formed so as to record information and tape position information. This apparatus includes a tape speed detecting unit for continuously detecting the running speed of the tape-shaped recording medium, a cylinder speed setting unit for setting target values of rotation of a rotary cylinder for making constant the component of speed at which the head moves in a track direction according to the output of the tape speed detecting unit, and a cylinder control circuit for controlling the rotary cylinder so as to adapt its rotation to the target value of velocity of the cylinder set by the cylinder speed setting unit. By rotating the cylinder at a rotational speed at which data reproduction can take place at a tape speed obtained by the tape speed detecting unit, the tape position information can be positively read out even in a transient state when the running speed of the recording medium changes.
REFERENCES:
patent: 4630142 (1986-12-01), Tani et al.
patent: 4688115 (1987-08-01), Takahashi et al.
patent: 4764824 (1988-08-01), Tani et al.
Arai Kazuo
Ota Kiyoshi
Wakiyama Kouji
Garland Steven R.
Matsushita Electric - Industrial Co., Ltd.
Psitos Aristotelis M.
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