Hitachi, Ltd.

Yoshihisa Suzuki

Yoshiaki Hanyu

Mituyoshi Otake

Takanoli Kaizuka

Yoichi Hidano

Kunio Matsumoto

Tosaku Kojima

A bundle of optical fibers is disclosed in which optical fibers each provided with a cladding layer are stacked tier upon tier in a close-packed hexagonal structure and the ratio of a radius of the core of each optical fiber to a radius of the optical fiber including the cladding layer ranges from 0.55 to 0.65.

Bundle of optical fibers

A magnetic recording medium having a metamorphosed layer on the surface of the magnetic layer of conventional magnetic recording media, said metamorphosed layer being derived from some of a binder component included in the magnetic layer, can prevent the sticking trouble taking place between the magnetic recording medium and the magnetic head. Said metamorphosed layer can be formed by irradiation with ultraviolet rays in the course of the production of magnetic recording media at the step of coating a dispersion of magnetic particles on a flexible support or after the coating step. Said metamorphosed layer can also be formed on the surface of once produced magnetic recording media irrespective of having caused the sticking trouble by irradiation with ultraviolet rays. Suitable apparatuses for producing such improved magnetic recording media are also provided.

Method for producing magnetic recording medium

Magnetic recording medium

The end of an auto-loading magnetic tape for a computer magnetic tape device is formed in a loop with the magnetized side thereof bent to face outwardly. The length of the bent portion is equivalent to between half and twice the square root value of the product of the radius of a file reel and the spare radial length of the reel radius. The loop is so constructed that the extreme end of the magnetic tape is bonded to the base side of the magnetic tape. The end of the magnetic tape thus offers higher air resistance than the other parts of the tape to the air flow in the cartridge containing the magnetic tape, thereby enhancing the chance of success in a tape auto-loading operation.

Auto-loading magnetic tape

Growing community of inventors

Yokohama, Japan

Yoshihisa Suzuki