Sony Corporation

Junya Endo

Masahiro Kiko

Naoki Kamaya

Masanori Maehara

Akira Kumano

Seisuke Ohba

Kentaro Shingai

Mutsuko Ochiai

Tamami Mishiro

Yoshio Tamaru

Tadashi Ooami

Akiro Saito

Yoshinori Ida

Hideo Horie

A head drum device of the present invention prevents a magnetic tape ( ) from clinging to the head drum device ( ) due to electrostatic charge by using a carbon-containing synthetic resin as the material of an upper drum ( ) in order to reduce the manufacturing cost for the upper drum. Also, setting the outside diameter of the upper drum ( ) smaller than that of an intermediate drum ( ) eliminates the need for a high-level of manufacturing precision in the manufacture of the upper drum ( ). Thus, it is possible to reduce the manufacturing cost for the upper drum ( ).

Head drum device with carbon-containing synthetic resin upper drum and larger diameter intermediate drum

A magnetic record/playback apparatus for continuously recording at least two tracks of data conforming to a digital recording format applied to a first magnetic tape having a first tape width onto one track formed on a second magnetic tape having a second tape width larger than the first tape width, and for reproducing the data from the second magnetic tape. This apparatus includes a fixed drum and a rotating drum adapted to be rotated relative to the fixed drum. The rotating drum has a record/playback head for recording and/or reproducing the data with respect to the second magnetic tape and an erase head for erasing the data recorded on the second magnetic tape. A plurality of grooves extending in a direction of rotation of the rotating drum are formed on the outer circumference of the rotating drum, and each of the grooves has a width of 0.21 mm&plusmn;0.02 mm. Further, the head width of the erase head as measured in a direction perpendicular to the direction of rotation of the rotating drum is larger than that of the record/playback head.

Magnetic record/playback apparatus

A cassette-type tape recording and/or reproducing apparatus having a tape guide drum with a rotary head moved in a circular path substantially coinciding with the drum circumference, and a holder spaced from the guide drum and locating a tape cassette in an operative position at which a plane passing through the tape in the cassette is inclined in respect to the plane of rotation of the rotary head; is provided with a tape loading apparatus having a tape guiding element guided for movement in a path extending from a first position for engaging the tape in the operatively positioned cassette, to a second position spaced substantially from the first position and at which the engaged tape is wrapped about the circumference of the guide drum, with at least a portion of the path leading to the second position of the tape guiding element being inclined relative to the plane of rotation of the head so that the tape wrapped on the circumference of the guide drum is arranged substantially helically in respect to the latter, a drive ring rotatable in a plane substantially parallel to the plane passing through the tape in the operatively positioned cassette, and a connecting rod assembly extending between the drive ring and a movable base of the tape guiding element and through which the drive ring, moving in such plane of movement thereof, can effect movements of the tape guiding element in the path thereof between the first and second positions.

Tape loading apparatus

Growing community of inventors

Tokyo, Japan

Junya Endo