Magnetic card reader and method for determining the coercive force of a magnetic card therein
US6189791A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1998 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Sep 11, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/084
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A magnetic card reader comprises a card insertion slot, a magnetic head for regenerating or recording magnetic information formed on a card to be inserted in the cart insertion slot and a determining device to determine coercive force of a data track for recording magnetic information of the card. A method for determining the coercive force of a magnetic card in a magnetic card reader in which magnetic information formed on a card to be inserted from a card insertion slot is regenerated or recorded by a magnetic head comprises the steps of providing a detecting portion which detects a change in static characteristics of the magnetic head and determining the coercive force of a data track by comparing output from the detecting portion, which detects a change in static characteristics of the magnetic head while being positioned across from the card, with a reference signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.