Hitachi, Ltd.

Hitachi Maxell, Limited

Takao Ketori

Takashi Sumida

Sigeo Sasaki

Kazuhiro Fujita

Takaharu Noguchi

Kenji Ogiro

Nobuo Suzuki

Tetsu Oi

Shigeo Sasaki

Kohji Tamura

Yutaka Miyoshi

A tape cartridge of the type having a pocket for drawing out a recording tape from the cartridge for tape loading and a shutter slidably mounted on the bottom portion of the cartridge for opening and closing the bottom opening of the pocket, and a plurality of ribs extending in a frontward and backward direction on the inner face of the shutter so as to assure a smooth sliding movement of the shutter.

Tap cartridge

In a tape cartridge of the type having a front lid for protection of the tape and the position thereof in a tape player is decided by a positioning member of the tape player, a reference face of the tape cartridge to which the positioning member of the tape player abuts is provided on the front end portion of the side wall of the cartridge so as to avoid interference with the front lid and the positioning member and to avoid the need for providing an opening in the front lid for passing the positioning member.

Tape cartridge with extending reference surfaces

In a tape cartridge comprising a case body having an opening for viewing the amount of roll of tape, at least one hub accommodated in the case body for winding a recording tape, a plate for closing the opening and a braking member for stopping rotation of the hub when not in use, the plate is composed of a support plate and a transparent window plate portion and is assembled in the case body defining a gap g between the support plate and the inner face of the top wall of the case body. The brake member is slidably inserted in the gap g with a part of the brake member engaging a part of the hub to stop rotation thereof.

Tape cassette

A method for fabricating a rear core for the magnetic circuit of a Hall effect magnetic head is disclosed. The bottom size of the rear core protrusion is made substantially equal to the size of a Hall element. A gap is provided between the Hall element and the rear core. In order to minimize the gap, the rear core block is provided with supports for fabrication, whereby the gap between the Hall element and the bottom protrusion of the rear core is positioned accurately. The supports are removed at the end of fabrication. The bottom protrusion of the rear core prevented pressure from being applied to the Hall element, thus improving the sensitivity of the Hall effect magnetic head without increasing noises.

Method for fabrication of rear chip for hall effect magnetic head

A magnetic head for recording on and reproducing from a magnetic tape is disclosed in which first and second magnetic head elements aligned in proximity in the direction of the tape feed are contained in a single case, and at least a pair of shield plates are provided for the respective head elements. The first magnetic head element comprises at least one reproducing head core, and the second magnetic head element comprises at least one recording head core, which cores have respective head gaps provided in parallel with each other and contacting the same track on the magnetic tape during its movement. Each of the shield plates has at least a first plate portion perpendicular to the direction of the tape feed disposed between the head elements and a second and a third plate portion extended in parallel with the direction of the tape feed from both ends of the first plate portion when viewed from the tape surface so as to enclose the individual head element at least in three directions, whereby magnetic leakage from one head element to the other during activation thereof is reduced.

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Osaka, Japan

Takao Ketori