| 摘要 |
PROBLEM TO BE SOLVED: To provide a tape reel which can automatically read tape information in relation to the wound magnetic tape and preferably can write or update the tape information. SOLUTION: This tape reel has a cylindrical core 12 to which a magnetic tape 28 is wound and upper and lower flanges which are provided at the upper and lower ends of this core 12 to function as the guides of magnetic tape 28 at the internal surfaces opposed with each other. At least, one of the external surfaces of these upper and lower flanges 14, 16 is provided with a tape information recording means 32 in which the tape information is recorded to be read with an optical head.
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