Patent ID: 7050265
Filing Date: 2006-05-23
Classification: G11B

Abstract:
1. A rotary head drum unit comprising: a cylindrical drum surface having a cylindrical surface of a fixed drum and a cylindrical surface of a rotating drum rotatable relative to said fixed drum; and a magnetic head for recording/reproducing a signal to/from a magnetic tape running along said drum surface, said magnetic head having a substantially flat tape sliding surface adapted to come into sliding contact with said magnetic tape, said tape sliding surface of said magnetic head having a projection at a front edge in a rotational direction of said rotating drum, said tape sliding surface being positioned at a level lower than the height of said magnetic tape flying above said drum surface and retracted from said drum surface; wherein said cylindrical surface of said rotating drum has a head mounting hole for mounting said magnetic head; and wherein during operation of said unit said magnetic tape is brought into contact with said tape sliding surface by negative pressure.