MAGNETIC ENCODING METHOD

PROBLEM TO BE SOLVED: To appropriately set the current level for write-in to encode information to a magnetic stripe or the amplification level for reading the magnetic stripe of a card. SOLUTION: This method is constituted in such a manner that the information is written with the prescribed number...

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Bibliographic Details
Main Authors HOWES RONALD B, WARWICK DENNIS J
Format Patent
LanguageEnglish
Published 29.05.2001
Edition7
Subjects
BOOK COVERS
BOOKBINDING
DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR
FILES
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
LOOSE LEAVES
MOVABLE-STRIP WRITING OR READING APPARATUS
PERFORMING OPERATIONS
PHYSICS
PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES
PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR
SPECIAL PRINTED MATTER
TRANSPORTING
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Summary:PROBLEM TO BE SOLVED: To appropriately set the current level for write-in to encode information to a magnetic stripe or the amplification level for reading the magnetic stripe of a card. SOLUTION: This method is constituted in such a manner that the information is written with the prescribed number of changes of the magnetic flux per prescribed length of the magnetic stripe by increasing the writing current within the preset range, while relatively moving a head, and this written magnetic stripe is read out by the reading head, and then the voltage value and the current value form the reading head are compared (166) with each other. When the voltage value is in the allowable range, the current value in that case is selected (168, 170), and when the voltage value is not in the allowable range, the preselected range at the writing time is changed (172) to repeat writing into the magnetic stripe (160) and read it, and then the process up to the time when the writing current values is decided is repeated.
Bibliography:Application Number: JP20000309718