The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 27, 1996
Filed:
Nov. 29, 1993
Takayuki Munemoto, Ibaraki, JP;
Kazuo Sakai, Ibaraki, JP;
Fujio Tajima, Tsuchiura, JP;
Tomokazu Ishii, Ibaraki, JP;
Fumio Takeda, Ushiku, JP;
Kouetsu Okuyama, Tsuchiura, JP;
Takeshi Itoh, Odawara, JP;
Shigeyuki Kobata, Odawara, JP;
Kenmei Masuda, Yokohama, JP;
Shigemitsu Higuchi, Fujisawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A magnetic recording and reproducing device and a magnetic tape library device are provided for properly recovering a function and issuing a warning when a failure of a magnetic head of the device takes place because of wear and dirt of the magnetic head. Further, a method for maintaining the magnetic head is provided. A wear sensor and a dirt sensor are prepared for sensing a wear amount of a state of dirt of the magnetic head. A head check controller operates to determine the wear amount of the magnetic head and the state of dirt based on the sensed result. In accordance with the determined result, the warning device is started for taking a precaution of preventing a head failure. As one aspect, the tape library device instructs to load the cleaning tape using a robot.