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:
Sep. 28, 1999
Filed:
Mar. 20, 1997
Yasuhiko Hanaoka, Kawasaki, JP;
Tikatu Katou, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A library apparatus capable of being manufactured at low cost, in which a cartridge can be moved accurately without high mechanical precision. The library apparatus comprises a plurality of cells each for containing a cartridge, a reference cell unit, an accessor unit, a passage unit, at least a drum unit, at least a drive unit, a guide rail and an accessor. The accessor has a high-accuracy diagnostic cell. The error between the light axis of a photoelectric sensor of the accessor and the operation axis of a hand unit of the accessor is measured by inserting and withdrawing a high-accuracy diagnostic cartridge into and out of the diagnostic cell. Also, a position correction value and a sensor sensitivity correction value for the accessor actually moving to a cell are determined. On the basis of the error and correction values thus obtained, a table showing the relative positions of all the cells is prepared before the operation of the library apparatus. The accessor is moved to an intended cell taking the correction value in the table into account at the time of operation of the library apparatus.