Abstract: The write protect mechanism provides a method for identifying the write protect state of the tape media enclosed in a tape cartridge from at least two orientations. A write protect switch on the front side of the tape cartridge housing moves to block the write protect aperture on the side of the tape cartridge housing when the write protect switch is in the write enable position and away from the aperture in the write protect position. A write protect indicator on the tape cartridge top cover includes a window that allows the user to view the position of the write protect switch by viewing the top of the switch. The top of the switch may include an arrow that moves corresponding to the position of the write protect switch, thus providing a means for the user to determine the write protect state. Human readable icons or color combinations on the write protect switch and/or adjacent to the write protect indicator clearly indicate the write protect state of the tape media enclosed within the tape cartridge.

Abstract: The present magnetic tape cartridge having a data storage medium connected to an integral cleaning tape section is designed to accommodate the length of cleaning tape in a manner that is compatible with existing tape drive systems. In particular, the hub on the supply reel in the single reel magnetic tape cartridge is dimensioned to accept the length of cleaning tape such that the radial position of the End Of Tape hole in the magnetic tape media occurs in the same position as that of existing single reel magnetic tape cartridges that are not equipped with the length of cleaning tape appended to the magnetic tape media. This enables the cleaning tape equipped magnetic tape cartridge to be compatible with existing tape drive systems.

Abstract: The self-centering tape reel for a single reel tape cartridge provides a magnetic tape reel that is equipped with one or more features to center the tape reel with respect to a rotatably driven feature, such as a drive chuck, in the tape drive that rotates the tape reel. The self-centering tape reel uses a chamfered ring that encircles the drive teeth formed on the tape reel that engage the drive chuck. The chamfered ring fits into a chamfer that is formed in the circumference of the spline access hole located in the bottom of the tape cartridge housing.

Abstract: The single reel tape cartridge with tape reel centering features provides one or more features to center the tape reel with respect to the interior surfaces of the tape cartridge housing and a rotatably driven feature, such as a drive chuck, in the tape drive that rotates the tape reel. The single reel tape cartridge with tape reel centering features provides mechanical positioning and centering of the tape reel with respect to the drive chuck of the tape drive when the tape cartridge is in any orientation and constrains lateral movement of the tape reel to prevent the tape reel from contacting the interior surfaces of the tape cartridge housing. This is accomplished by the use of a spring that applies a bias force to press the tape reel against the drive chuck in the tape drive, which rotates the tape reel. One end of the spring is seated in a spring sleeve that is formed in the center of the interior surface of the top section of the tape cartridge housing. The other end of the spring engages the tape reel.

Abstract: The single reel tape cartridge with tape reel centering features provides one or more features to center the tape reel with respect to the interior surfaces of the tape cartridge housing and a rotatably driven feature, such as a drive chuck, in the tape drive that rotates the tape reel. The single reel tape cartridge with tape reel centering features provides mechanical positioning and centering of the tape reel with respect to the drive chuck of the tape drive when the tape cartridge is in any orientation and constrains lateral movement of the tape reel to prevent the tape reel from contacting the interior surfaces of the tape cartridge housing. This is accomplished by the use of a spring that applies a bias force to press the tape reel against the drive chuck in the tape drive, which rotates the tape reel. One end of the spring is seated in a spring sleeve that is formed in the center of the interior surface of the top section of the tape cartridge housing. The other end of the spring engages the tape reel.

Abstract: The present magnetic tape cartridge having a data storage medium connected to an integral cleaning tape section is designed to accommodate the length of cleaning tape in a manner that is compatible with existing tape drive systems. In particular, the hub on the supply reel in the single reel magnetic tape cartridge is dimensioned to accept the length of cleaning tape such that the radial position of the End Of Tape hole in the magnetic tape media occurs in the same position as that of existing single reel magnetic tape cartridges that are not equipped with the length of cleaning tape appended to the magnetic tape media. This enables the cleaning tape equipped magnetic tape cartridge to be compatible with existing tape drive systems.

Abstract: The write protect mechanism provides a method for identifying the write protect state of the tape media enclosed in a tape cartridge from at least two orientations. A write protect switch on the front side of the tape cartridge housing moves to block the write protect aperture on the side of the tape cartridge housing when the write protect switch is in the write enable position and away from the aperture in the write protect position. A write protect indicator on the tape cartridge top cover includes a window that allows the user to view the position of the write protect switch by viewing the top of the switch. The top of the switch may include an arrow that moves corresponding to the position of the write protect switch, thus providing a means for the user to determine the write protect state. Human readable icons or color combinations on the write protect switch and/or adjacent to the write protect indicator clearly indicate the write protect state of the tape media enclosed within the tape cartridge.

Abstract: The features for locking and driving a tape reel in a single reel tape cartridge eliminate the dependence on friction for the mating (coupling) between the driving features and prevent the disengagement of the tape reel from a drive chuck due to high rotational forces. The geometry can be in the form of a post and hole arrangement or meshing teeth such that the rotational force is transmitted between the two bodies through mating surfaces that are perpendicular to the vector of the rotational force. This geometry still allows vertical motion of the bodies with respect to each other (i.e. they can be disengaged when desired) but the rotational force cannot translate into movement of one body with respect to the other body. The same geometry can be used to prevent the reel form being rotated when not in the tape drive.

Abstract: The single reel tape cartridge with tape reel centering features provides one or more features to center the tape reel with respect to the interior surfaces of the tape cartridge housing and a rotatably driven feature, such as a drive chuck, in the tape drive that rotates the tape reel. The single reel tape cartridge with tape reel centering features provides mechanical positioning and centering of the tape reel with respect to the drive chuck of the tape drive when the tape cartridge is in any orientation and constrains lateral movement of the tape reel to prevent the tape reel from contacting the interior surfaces of the tape cartridge housing. This is accomplished by the use of a spring that applies a bias force to press the tape reel against the drive chuck in the tape drive, which rotates the tape reel. One end of the spring is seated in a spring sleeve that is formed in the center of the interior surface of the top section of the tape cartridge housing. The other end of the spring engages the tape reel.

Abstract: An autoloading apparatus for alternately, sequentially loading magnetic tape cartridges into and unloading them from an adjacent magnetic tape drive includes a vertically oriented tape cartridge chute for containing a manually stacked plurality of tape cartridges to be subsequently sequentially loaded by gravity into the tape drive, an unload storage enclosure for storing a plurality of tape cartridges removed by the autoloading apparatus from the magnetic tape drive, a cartridge unloading mechanism responsive to opening of the cartridge door of the magnetic tape drive and having a hook and cartridge sleeve arrangement for engaging and holding a cartridge resident in the magnetic tape drive and for retractably moving that cartridge to a position where it is released by gravity into the unloading storage enclosure, and a cartridge loading mechanism operative in alternating sequence with the cartridge unloading mechanism for controlling a hinged slide at the bottom of the tape cartridge chute for releasing the

Abstract: An automated magnetic tape cartridge library system includes a cabinet (24) having a door (26) removably and pivotally connected thereto. The cabinet (24) houses a plurality of tape drives (56A-56E) and a plurality of racks (70) wherein magnetic tape cartridges are stored. A cartridge transport assembly (100) serves to retrieve a cartridge from a rack (70) and to load the cartridge into a target tape drive (56), and vice versa. Movement of the cartridge transport assembly (100) along X, Y and Z rectangular coordinate axes is effected by X, Y, and Z displacement systems (104, 106, 108). The cartridge transport assembly (100) and the X, Y and Z displacement systems (104, 106, 108) are all mounted on the removable, pivotal door (26). The cartridge transport assembly (100) includes a pair of engagement fingers (402A, 402B) which engage a selected cartridge upon contact with the cartridge.