Patent ID: 6452744
Filing Date: 2002-09-17
Classification: G11B

Abstract:
A magnetic record/playback apparatus for continuously recording at least two tracks of data conforming to a digital recording format applied to a first magnetic tape having a first tape width onto one track formed on a second magnetic tape having a second tape width larger than said first tape width, and for reproducing said data from said second magnetic tape, comprising:a fixed drum; and a rotating drum adapted to be rotated relative to said fixed drum, said rotating drum having a magnetic head for recording said data onto said second magnetic tape and for reproducing said data from said second magnetic tape; said rotating drum having an outer circumferential surface formed with three equally spaced grooves extending in a direction of rotation of said rotating drum, each of said grooves having a width of 0.21 mmÂ±0.02 mm, whereby a maximum output waveform of close to 100% is achieved when the rotating drum rotates at a speed of 1800 rpm and at a speed of 4500 rpm.