Reading method and apparatus for cartridge library

Details Reading method and apparatus for cartridge library Reading method and apparatus for cartridge library

1989-11-09

1991-10-22

Trafton, David

Registers

Systems controlled by data bearing records

Mechanized store

235462, 360 92, G06K 1500

Patent

active

050597728

ABSTRACT:
An automated magnetic tape catridge library system 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 cartridge cell (826) of a rack (70) and to load the cartridge into a target tape drive (56), and vice versa. The cartridge transport assembly (100) includes a pair of engagement fingers (402A, 402B) which engage a selected cartridge upon contact with the cartridge, and a biased plunger (438). The plunger (438) has a bar code reader (446) internally mounted therein for reading bar code indicia on the cartridges and for detecting tracking indicia (868) provided on projections (866) of the cartridge racks (70). A method for library inventory, necessitated by possible manual removal or insertion of cartridges after opening of a library door (26), is also provided. A library map has stored therein cartridge label bar code values and the precise X, Y, and Z coordinates for each cartridge in the library system.

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