Fujitsu Corporation

Masayoshi Kobayashi

Akira Takano

Tsuneyoshi Oohara

Makoto Sasaki

Keisuke Hoshino

Masaru Ohshita

Masahiko Sakaguchi

Makoto Matsuda

Toshihiko Fujii

Yoshio Kotaki

Kazunori Ishiyama

A magnetic tape apparatus for controlling a running of magnetic tape, and being able to control a cleaning medium to clean a magnetic head. The apparatus including a feed reel shaft and a take-up reel shaft respectively adapted to hold a feed reel and a take-up reel of the cleaning medium; a magnetic head; a control part controlling the feed reel shaft and the take-up reel shaft so as to reel the cleaning medium; and a cleaning section determining part determining a cleaning section on the cleaning medium that is used for a single cleaning step of the magnetic head. The control part controls the feed reel shaft and the take-up reel shaft to clean the magnetic head for the cleaning section by the cleaning medium. Additionally, the control part reduces a tension of the cleaning medium more than that applying in a normal running by independently controlling the feed reel and the take-up reel when the control part runs the cleaning medium to the cleaning section determined by the cleaning section determining part.

Magnetic tape apparatus with cleaning medium and method of controlling same

In a magnetic tape apparatus for controlling a running of a magnetic tape to stop at a reference stop position, a control part controls the feed reel shaft and the take-up reel shaft to reel the magnetic tape and a stop position control part displaces a stop position of the magnetic tape from the reference position wherein the control part activates the stop position control part to displace the stop position when the control part stops running the magnetic tape.

Magnetic tape apparatus and method for controlling the running of a magnetic tape to stop at a stop position

A device for receiving a tape cartridge having a reel and a record tape winded around the reel where the record tape has a mounting unit attached to one end thereof includes an engaging unit which engages with the mounting unit, a threader arm which carries the engaging unit together with the mounting unit along a predetermined path to thread the record tape in the device during a threading operation and to unthread the record tape from the device during an unthreading operation, a reel motor which drives the reel of the tape cartridge, and a control unit which controls the reel motor to adjust tension in the record tape during the threading operation and the unthreading operation.

Magnetic tape device with mechanism for controlling threading operation

Disclosed herein is a magnetic tape unit having a magnetic head for reading and writing data from and onto a magnetic tape. The magnetic tape is traveled in contact with the magnetic head during a read/write operation of the magnetic head. During a rest period where the read/write operation of the magnetic head is not performed, a reciprocating motion of the magnetic tape by a small distance is performed with a predetermined period. A temperature in the vicinity of the magnetic head is detected by a temperature sensor. The predetermined period is changed according to the temperature detected by the temperature sensor. Accordingly, the adhesion of the magnetic tape to the magnetic head can be well prevented irrespective of the temperature inside the tape unit.

Magnetic tape unit

A magnetic tape apparatus for reading data from and writing data to a magnetic tape has a magnetic head for reading or writing the data, and first and second tape guides. The first tape guide has a first guide surface to guide the magnetic tape, and the first guide surface has a width that is narrower than the width of the magnetic tape. The second tape guide has a second guide surface to guide the magnetic tape, and the second guide surface has a width that is wider than the width of the magnetic tape. If the tape moves laterally against a flange on the first tape guide, the flange initially yields to the pressure of the tape. Then the flange presses against the magnetic tape to return the tape to a laterally aligned position along a tape path.

Magnetic tape apparatus

In a magnetic tape drive for a single-reel type magnetic tape cartridge having a leader block coupled to a leading end of a magnetic tape wound therein, a hub for winding the tape pulled out of the cartridge is disposed at rear side of a magnetic head unit for writing data on and reading data from the tape, and has a radial slot formed therein for receiving the leader block of the tape threaded through the unit. The rotational direction of the hub is determined such that the leader block is subjected to an radially-inward force in the slot of the hub at the beginning of a rotational movement of the hub, whereby slippage of the leader block from the slot of the hub can be prevented. A flat flexible printed-circuit cable is used in the drive to establish an electrical connection between a magnetic head of the unit and an amplifier printed-circuit board thereof, and includes a flexible plate having circuit patterns formed on the side faces thereof and connected to each other by through-holes formed therein, and connectors provided on the side faces of the plate and disposed at the ends thereof. The plate is symmetrically shaped with respect to a geometrical center thereof, and the connectors are symmetrically disposed thereto.

Magnetic tape drive for single-reel type magnetic tape cartridge

A magnetic tape unit with a magnetic head for reading and writing data from and onto a magnetic tape. The magnetic tape is kept in constant contact with the magnetic head, and a reel motor travels the magnetic tape kept in contact with the magnetic head. Adhesion of the magnetic tape to the magnetic head is prevented by slowly driving the reel motor to travel the magnetic tape at a speed lower than a normal traveling speed for a read/write operation of the magnetic head, during a rest period when the read/write operation of the magnetic head is not performed.

A magnetic tape device including a tape guide to guide a magnetic tape as the magnetic tape travels past a magnetic head to provide good contact between the magnetic tape and the magnetic head. The tape guide includes a roller guides, or roller guides and guide posts. The roller guide includes upper and lower flange units in sliding contact with the edges of the magnetic tape, and a roller unit between the upper and lower flange unit having the magnetic tape wrapped on an outer circumferential surface. The upper and lower flange units include concave portions disposed in an upper surface of the lower flange unit, and in a lower surface of the upper flange unit, to avoid sliding contact with the edge of the magnetic tape. The concave portions are positioned in the upper and lower flange units such that the upper and lower edges of the magnetic tape contact the upper and lower flange units only at a portion corresponding to the portion of the magnetic tape contacting the outer circumferential surface of the roller unit. The guide post also includes upper and lower flange units having concave portions to avoid sliding contact. Furthermore, the lower flange unit of the roller guide and the lower flange unit of the guide post may be the same member.

Magnetic tape device having a tape guide which prevents excessive

A magnetic tape apparatus for reading/writing data from/to a magnetic tape by magnetic heads. The magnetic tape apparatus includes a roller guide for guiding the magnetic tape, a magnetic head assembly having several magnetic heads, and a structure for aligning the magnetic tape to the magnetic heads, wherein the vertical position of the magnetic tape is determined by a lower flange of the roller guide. One feature of the present invention relates to the structure of the roller guide wherein the lower flange is separable from other members of the roller guide such that the vertical position of the magnetic head is the lower flange. Another feature of the present invention is a method for aligning the magnetic heads to a track of the magnetic tape wherein the vertical position of a keen edge formed on the lower flange assembled in the roller guide is detected by microscope.

Magnetic tape apparatus having means for aligning magnetic tape to

Magnetic tape drive for a single-reel type magnetic tape cartridge

A magnetic tape drive for driving a magnetic tape stored in a cartridge for writing and reading data as an external storage device of a computer, etc., and equipped with a leader block at a distal end thereof, comprises a file reel having the cartridge fitted thereto, and a machine reel rotating in the same direction as the file reel while the leader block is fitted to a hub thereof, and taking up the magnetic tape, wherein data is written/read to and from the magnetic tape in a travelling path between the file reel and the machine reel. In this construction, the magnetic tape is wound at an initial tension lower than a normal tape tension at the start of winding of the magnetic tape by the machine reel until a predetermined number of turns of the magnetic tape is wound on the machine reel, and thereafter the tape is wound at a greater tension. As a result, the leader block can be correctly fixed to the hub of the machine reel, and even when a thin magnetic tape is used, read/write errors do not occur, and the apparatus can be made more compact.

Growing community of inventors

Kawasaki, Japan

Masayoshi Kobayashi