Continuous scanning magnetic recording and/or reproducing system and apparatus

Claim 2

A continuously scanning television magnetic recording system which comprises a magnetic tape, means comprising at least one rotary magnetic head for scanning over the magnetic tape with tracks oblique to the longitudinal direction of the tape, means for operating said system in either a forward mode or a reverse mode, means responsive to operation in said forward mode for causing the magnetic tape to travel in one direction and for rotating the rotary magnetic head in one direction for effecting a forward scanning on the magnetic tape by the rotary magnetic head, means responsive to operation in said reverse mode for causing the magnetic tape to travel in a direction which is reverse to the one direction and for rotating the rotary magnetic head in a direction to the one direction for effecting a reverse scanning on the magnetic tape by the rotary magnetic head, means for reversing respectively the travelling direction of the magnetic tape and the rotating direction of the rotary magnetic head when the rotary magnetic head has accomplished the forward scanning or reverse scanning on the magnetic tape, and means responsive to a control signal recorded on said tape for controlling the travelling speed of the magnetic tape and the rotating speed of the rotary magnetic head for locating the tracks scanned during said reverse mode midway between the tracks scanned during said forward mode.

Claim 3

A continuously scanning magnetic recording system in the system of claim 1 in which said rotary magnetic head is a rotary recording magnetic head and forms recording tracks on the magnetic tape both during the forward scanning mode and the reverse scanning mode.

Claim 4

The system of claim 2 in which said recording magnetic head comprises means forming a first plurality of parallel tracks directed from one edge to the other edge of the tape, said tracks being obliquely oriented to its longitudinal direction on thE magnetic tape during the forward scanning mode , and means forming a second plurality of parallel tracks directed from the other edge to the one edge of the tape in parallel and alternate with the first tracks during the reverse scanning mode.

Claim 5

The system of claim 1, wherein the magnetic tape has a plurality of first parallel tracks directed from one edge to the other edge of the tape, said tracks being obliquely oriented to its longitudinal direction and a second plurality of parallel tracks directed from the other edge to the one edge of the tape in parallel and alternate with the first racks.

Claim 6

The continuous magnetic reproducing system in the system of claim 1 in which said magnetic tape has recorded tracks, and said rotary magnetic head is a rotary reproducing magnetic head for producing the recorded tracks on the magnetic tape both during the forward scanning mode and the reverse scanning mode.

Claim 7

The continuous recording and reproducing system in the system of claim 1 in which said rotary magnetic head is a rotary recording and reproducing magnetic head forming recorded tracks on the magnetic tape during both the forward scanning mode and the reverse scanning mode and reproducing signals from the recorded tracks on the magnetic tape.

Claim 8

The system of claim 2 in which said rotary recording magnetic head is provided on a rotary body and further erasing magnetic heads are provided on both sides of the rotary recording magnetic head on the rotary body.

Claim 9

The system of claim 1 which has further means for detecting the end of the magnetic tape, means responsive to a detection of an output of the detecting means for stopping the travel of the magnetic tape and the rotation of the rotary magnetic head, and means operated a predetermined delay time after the action of the stopping means for actuating the reversing means.

Claim 10

The system of claim 1 and servo means for causing the rotary magnetic head to scan said tape during the reverse scanning mode , said scan during reverse operation following tracks which are recorded in parallel and alternate with the tracks scanned during the forward scanning mode.

Claim 11

The system of claim 2 and means for preventing the supplying of a recording signal to the rotary recording magnetic head until the travel of the magnetic tape and the rotation of the rotary recording magnetic head enter into synchronization when the travelling direction of the magnetic tape and the rotary direction of the rotary recording magnetic head are reversed by action of the reversing means.

Claim 12

The system of claim 1 and a field skip system means for recording the video signal in every other field by one magnetic head , and means for reproducing each recorded signal track two times by two magnetic heads during the reproducing mode.

Claim 13

A continuously scanning apparatus operative in a forward mode or a reverse mode, said apparatus comprising a magnetic tape, means comprising at least one rotary magnetic head scanning over the magnetic tape with tracks recorded obliquely with respect to the longitudinal direction of the tape, means responsive to operation in said forward mode for causing the magnetic tape to travel in one direction and for rotating the rotary magnetic head in one direction for effecting a forward scanning on the magnetic tape by the rotary magnetic head, means responsive to operation in said reverse mode for causing the magnetic tape to travel in a direction which is reverse to the one direction and for rotating the rotary magnetic head in a direction which is reverse to the one direction for effecting reverse scanning on the magnetic tape by the rotary magnetic head, means for reversing respectively the travelling direction of the magnetic tape and the rotating direction of the rotary magnetic head when the rotary magnetic head has finished either a forward scanning or reverse scanning on the magnetic tape , and means responsive to a control signal recorded on the magnetic tape for rotating direction of the rotary magnetic head when the rotary magnetic head has finished either a forward scanning or reverse scanning on the magnetic tape, and means responsive to a control signal recorded on the magnetic tape for controlling the travelling speed of the magnetic tape and the rotating speed of the rotary magnetic head for locating the tracks scanned during said reverse mode midway between the tracks scanned during said forward mode.

Claim 14

A continuously scanning apparatus operative in a forward mode or a reverse mode, said apparatus comprising a magnetic tape, means comprising at least one rotary magnetic head scanning over the magnetic tape with tracks recorded obliquely with respect to the longitudinal direction of the tape, means responsive to operation in said forward mode for causing the magnetic tape to travel in one direction and for rotating the rotary magnetic head in one direction for effecting a forward scanning on the magnetic tape by the rotary magnetic head, means responsive to operation in said reverse mode for causing the magnetic tape to travel in a direction which is reverse to the one direction and for rotating the rotary magnetic head in a direction which is reverse to the one direction for effecting reverse scanning on the magnetic tape by the rotary magnetic head, means for reversing respectively the travelling direction of the magnetic tape and the rotating direction of the rotary magnetic head when the rotary magnetic head has finished either a forward scanning or reverse scanning on the magnetic tape , and means responsive to a control signal recorded on the magnetic tape for rotating direction of the rotary magnetic head when the rotary magnetic head has finished either a forward scanning or reverse scanning on the magnetic tape, and means responsive to a control signal recorded on the magnetic tape for controlling the travelling speed of the magnetic tape and the rotating speed of the rotary magnetic head for locating the tracks scanned during said reverse mode midway between the tracks scanned during said forward mode.