Abstract: An information medium includes: a tape reel around which a magnetic tape is wound; a case body that encloses the tape reel; a lid, including a support plate that is pivotally attached to the case body, that opens and closes a withdrawal opening; and a coil spring disposed between the case body and the lid in a state where a first arm portion of the coil spring engages a top plate of the case body and a second arm portion of the coil spring has engaged the lid, the coil spring energizing the lid in a direction of pivotal movement so as to close the withdrawal opening. The coil spring is formed so that the first arm portion is linear, and when the coil spring has been disposed, an end of the first arm portion protrudes from a withdrawal opening-side edge of the top plate.

Abstract: An information recording medium of the present invention includes a pair of tape reels around which a magnetic tape is wound, a case main body having first windows and second windows formed to the side walls thereof and rotatably accommodating the pair of tape reels, wherein the first windows cause detection light to enter the inside of the case main body to detect the tape ends of the magnetic tape and the second windows cause the detection light to outgo to the outside of the case main body, a front cover turnably attached to the case main body to open and close a drawing-out port of the magnetic tape; and a reel brake, and the reel brake includes a main body disposed to the case main body so as to slide along a direction in which the main body comes into contact with and separates from the tape reels, and arms formed to the main body as well as slinging the main portion by moving along the direction in which they come into contact with and separate from the tape reels between the first windows and the seco

Abstract: A tape cartridge, for use with a tape drive having an actuation member, includes a cartridge body that is insertable into the tape drive and a door movably associated with the cartridge body. The door is engageable with the actuation member when the cartridge body is inserted into the tape drive, and is movable between a closed position and an open position upon engagement with the actuation member. Furthermore, the door includes a retainer that is enageable with the actuation member when the door is in the open position to facilitate retention of the cartridge body in the tape drive.

Abstract: A tape cassette, in which a mouth portion opened forward, upward, and downward is provided in a front portion of a cassette shell containing tape reels around which a tape-like magnetic recording medium is wound, and part of the tape-like recording medium is positioned so as to cross the front end of the mouth portion, includes a front lid positioned on the front side of part of the tape-like recording medium positioned so as to cross the front end of the mouth portion; a slider movable forward and rearward, the slider being provided on the cassette shell; and a back lid positioned on the rear side of part of the tape-like recording medium positioned so as to cross the front end of the mouth portion, the back lid being separated rearward from the tape-like recording medium along with rearward movement of the slider. The tape cassette is characterized in that the back lid is supported on the slider, and each of the slider and the back lid is made from a good conductor, for example, stainless steel.

Abstract: Disclosed is a tape cassette which is loaded in a tape drive apparatus by a manner of inserting the tape cassette in a cassette holder and then moving the cassette holder relative to a main chassis of the tape drive apparatus. The tape cassette includes a mouth portion provided in a front portion of a cassette shell in such a manner as to be opened forward, upward, and downward. Part of a magnetic tape (tape-like recording medium) is positioned to cross the front end of the mouth portion. The tape cassette also includes a front lid for covering the front side of the magnetic tape. The front lid is opened when the tape cassette is inserted in the cassette holder. This tape cassette is characterized by including two side butting portions and two upper butting portions which are brought into contact with two side receiving portions and two upper receiving portions of the cassette holder when the tape cassette is inserted in the cassette holder.

Abstract: A tape cartridge includes a first rotatable hub and a second rotatable hub. The first hub and the second hub are wound so that they are substantially full of the flexible recording tape. The flexible tape between the first and second hub crosses a centerline including the two hubs. Both the first rotatable hub and the second rotatable hub are removable from the cartridge. The hubs have a flange with a conical edge which nests into a first opening and a second opening in the tape cartridge with conical receiving surfaces. The conical edges have a plurality of reliefs therein to form conical teeth within each of the first and second hub. The conical teeth of one of the hubs engages the reliefs of the other hub to seal the cartridge and to support the tape between the hubs. The cartridge also includes a base, a latch for engaging the first rotatable hub and the second rotatable hub. A cartridge cover covers the latch and base.