Method and system for recording a new coded message in place of an old coded message recorded on a magnetic stripe carried by a support document by manual displacement of the document
US5286958A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1992 |
| Grant date | Feb 15, 1994 |
| Priority date | — |
| Expiry date | Sep 28, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q20/3437
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a method for recording a new coded message in place of an old coded message recorded on a magnetic stripe carried by a support document by manual displacement of said document, the message being divided into a first part and a second part separated by a gap, the clock signal used to write the first part of the new message is a clock signal obtained by reading the second part of the old message. The clock signal used to write the second part of the new message is a clock signal obtained by reading the first part of the new message, newly written. The system for implementing this method comprises a write head between two synchronization heads and an electronic circuit which produces from the signals from the two synchronization heads a clock signal slaved to the speed of displacement of the support document. This clock signal is sent to a write signal generator connected to the write head. The write signal generator also receives the data to be recorded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.