Sony Corporation

Shinji Masugi

Kengo Saito

Ikushi Nakashima

Masanori Sato

Osamu Koizumi

Noriko Nakazawa

Yuji Iwaki

Toshio Kano

Takashi Sato

Taizo Fukuda

Ryoki Watanabe

A disc cartridge having a disc for recording information signals and a main cartridge body member for rotatably housing the disc. The disc cartridge is designed to be loaded on a recording and/or reproducing apparatus. The main cartridge body member has, on its one surface, a label area for bonding a display label indicating the recording contents of the information signals, while having, on its other surface, a spindle hole for rotating the disc by the recording and/or reproducing apparatus. The main cartridge body member has a design parameter discriminating hole extending along the back side opposite to the front side in the cartridge inserting direction. The recording capacity or design parameters of the disc housed within the main cartridge body member may be discriminated by detecting the design parameter discriminating hole.

Disc cartridge having design parameters of a recording and/or

A recording and playback device utilizing magnetic tape, such as a tape cassette, as a recording medium includes a magnetic head arranged to contact one side of the magnetic tape and a stabilizer arranged positioned directly opposed the magnetic head corresponding to the opposite side of the magnetic tape such that the magnetic tape move along a path interposed between the stabilizer and the magnetic head. The stabilizer includes a tape slider surface in contact with the side of the tape opposite the magnetic head contacting side. Further, the tape slider surface of the stabilizer may be formed with a recessed portion and tape surface scraper portions. According to this structure vibration of the magnetic tape in the vicinity of the magnetic head is greatly reduced such that a head servo for control of the magnetic head may accurately position the magnetic head even in devices utilizing a very small track pitch. Also read/write error, tape dropout, and the like, due to foreign matter entering the tape path, is reliably prevented. Further, space between the magnetic tape and the head is reduced and contact pressure between the head and the tape is maintained to optimize recording and or playback operations between the head and the magnetic tape.

Magnetic tape stabilizer for a recording and playback device

A recording/reproducing apparatus in which recording/reproducing characteristics for the magnetic tape may be stabilized and data errors may be reliably prevented form occurrence. The recording/reproducing apparatus has a magnetic head 81 in which a pair of magnetic core halves 83A, 83B of a magnetic material are abutted to each other via a gap material g to form a magnetic core. Magnetic tape guide units 82A, 82B are provided in the vicinity of the magnetic head 81. The magnetic tape guide units 82A, 82B are formed with magnetic tape suction openings 82b, 82b closed by a magnetic tape 88 adapted for having a sliding contact with the tape slide surface 82a. The magnetic tape suction openings 82b, 82b suck the magnetic tape 88 running on the tape slide surfaces 82a, 82a of the magnetic tape guide units 82A, 82B.

Recording/reproducing apparatus, magnetic head and tape cartridge

Growing community of inventors

Miyagi, Japan

Shinji Masugi