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:
May. 31, 1988
Filed:
Dec. 23, 1986
Oki Electric Industry Co., Ltd., Tokyo, JP;
Tokyo Engineering Co., Ltd., Yokohama, JP;
Abstract
In an alignment disk for use in adjustment or inspection of a magnetic read/write head in a floppy disk drive unit, which further includes an erase head, the alignment disk is provided with first regions in which signals are prerecorded and second regions in which no signals are prerecorded, the first and the second regions being alternately disposed along a locus followed by the read/write head when the disk is rotated. The length of each of the first region is smaller than the distance between read/write head and the erase head and the length of each of the second regions are larger than the distance between the read/write head and the erase head.