Method of adjusting head skew of magnetic recording heads
US5406422A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1993 |
| Grant date | Apr 11, 1995 |
| Priority date | — |
| Expiry date | Oct 21, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/36
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of adjusting alignment of a magnetic head to be within an alignment specification in accordance with the invention includes recording on magnetic material of a test card a digital code having a greater number of bits per unit length than the set number of bits used for conventional magnetic recording of credit cards. The test card produces an electrical playback signal which varies in magnitude with head alignment at a second rate greater than a first rate produced during conventional recording. The test card is read repeatedly and alignment of the head is adjusted until a maximum electrical playback signal is produced indicating that the head is set within the alignment specification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.