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. 07, 2019
Filed:
Jul. 16, 2018
International Business Machines Corporation, Armonk, NY (US);
Nhan X. Bui, Tucson, AZ (US);
Randy C. Inch, Tucson, AZ (US);
David L. Swanson, Tucson, AZ (US);
Tomoko Taketomi, Yamato, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
In one general embodiment, a method includes calculating a differential position value based on readback signals from at least two servo readers of a magnetic head reading servo tracks of a magnetic recording tape. The differential position value is compared to a previously-calculated differential position value. An action is performed in response to determining that the difference between the differential position value and the previously-calculated differential position value is in a predefined range. The differential position value is an average of differential position values for a set of samples, wherein the previously-calculated differential position value is an average of previously-calculated differential position values for a set of previously-obtained samples. In another general embodiment, an apparatus includes a magnetic head having servo readers and a controller in communication with the servo readers. The controller is configured to detect a sudden change in a width of a magnetic recording tape.