Kabushiki Kaisha Sankyo Seiki Seisakusho

Kiyoharu Iwanami

Fumito Komatsu

Akiyoshi Toyama

Yuzo Oguchi

Tuneo Tezuka

A disc-type recording and reproducing system in which only a single motor is required for rotating the disc and for moving a magnetic head radially with respect to the disc. The system includes a continuously rotating body, a coupling rotary body rotated by the continuously rotating body, a subordinate rotary body rotated by the continuously rotated body, and a cam having a head-moving cam surface whose diameter changes in steps and engagement recesses corresponding to each diameter step rotatably holding the coupler rotary body. A head movement control mechanism is engageable with the engagement portion of the cam for controlling the rotation of the cam and allowing the subordinate rotary body to continue rotating while the head is not moving. The head control device releases control of the rotation of the cam and controls rotation of the subordinate rotary body while the head is moving.

Disk-type recording and reproducing apparatus

A tape drive for a tape cartridge having a protective cover at one corner thereof. The tape cartridge is inserted with the protective cover on the inner end. The protective cover is opened at the back of the drive. Then, a door on the drive is closed which first causes a magnetic head to move vertically along a width of the tape to confront the type and then causes the cartridge to slide laterally into the magnetic head.

Magnetic tape drive machine

A recording and reproducing disk cassette having a case accommodating a rotatably mounted disk which is partially exposed through first openings provided in the case which are normally maintained closed by a shutter plate which is moved when the cassette is loaded by the disk to expose the first openings, including first steps provided on the case at an elevation below the outer surface of the case, second steps provided on the case at an elevation below the first steps, the shutter plate being slidably mounted on the second steps, and a protective plate having second openings coinciding with the first openings of the case and being fixedly mounted on the first steps of the case such that the protective plate covers the shutter plate.

Growing community of inventors

Nagano, Japan

Kiyoharu Iwanami