IT967902B - Sistema per la lettura di dati registrati su documenti mediante inchiostro magnetico - Google Patents

Sistema per la lettura di dati registrati su documenti mediante inchiostro magnetico

Info

Publication number
IT967902B
IT967902B IT29721/72A IT2972172A IT967902B IT 967902 B IT967902 B IT 967902B IT 29721/72 A IT29721/72 A IT 29721/72A IT 2972172 A IT2972172 A IT 2972172A IT 967902 B IT967902 B IT 967902B
Authority
IT
Italy
Prior art keywords
documents
data recorded
reading data
magnetic ink
ink
Prior art date
Application number
IT29721/72A
Other languages
English (en)
Original Assignee
Ibm
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ibm filed Critical Ibm
Application granted granted Critical
Publication of IT967902B publication Critical patent/IT967902B/it

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Character Input (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Digital Magnetic Recording (AREA)
  • Magnetic Heads (AREA)
  • Character Discrimination (AREA)
  • Magnetic Record Carriers (AREA)
IT29721/72A 1971-12-27 1972-09-27 Sistema per la lettura di dati registrati su documenti mediante inchiostro magnetico IT967902B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US21257971A 1971-12-27 1971-12-27

Publications (1)

Publication Number Publication Date
IT967902B true IT967902B (it) 1974-03-11

Family

ID=22791618

Family Applications (1)

Application Number Title Priority Date Filing Date
IT29721/72A IT967902B (it) 1971-12-27 1972-09-27 Sistema per la lettura di dati registrati su documenti mediante inchiostro magnetico

Country Status (7)

Country Link
US (1) US3796859A (it)
JP (1) JPS5311174B2 (it)
CA (1) CA989065A (it)
DE (1) DE2257029C3 (it)
FR (1) FR2170509A5 (it)
GB (1) GB1362105A (it)
IT (1) IT967902B (it)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3887944A (en) * 1973-06-29 1975-06-03 Ibm Method for eliminating part of magnetic crosstalk in magnetoresistive sensors
DE2705439A1 (de) * 1976-02-10 1977-08-11 Denki Onkyo Co Ltd Magnetfuehler
FR2390778A1 (fr) * 1977-05-13 1978-12-08 Cii Honeywell Bull Dispositif de lecture d'informations magnetiques
US4547824A (en) * 1982-12-17 1985-10-15 International Business Machines Corporation Dual biasing for integrated inductive MR head
JPH0442307Y2 (it) * 1986-12-02 1992-10-06
US5157245A (en) * 1988-06-29 1992-10-20 Murata Mfg. Co., Ltd. Magnetic sensor
US4987508A (en) * 1988-12-23 1991-01-22 Eastman Kodak Company Permanent magnet shaped to provide uniform biasing of a magnetoresistive reproduce head
JPH02309748A (ja) * 1989-05-24 1990-12-25 Murata Mfg Co Ltd 磁気ダイヤルカードおよびカードダイヤル装置
US5068519A (en) * 1990-01-10 1991-11-26 Brandt, Inc. Magnetic document validator employing remanence and saturation measurements
US5266786A (en) * 1991-10-01 1993-11-30 Ncr Corporation Magnetoresistive head for reading magnetic ink characters
US5552589A (en) 1993-08-31 1996-09-03 Eastman Kodak Company Permanent magnet assembly with MR element for detection/authentication of magnetic documents
US5644228A (en) * 1993-08-31 1997-07-01 Eastman Kodak Company Permanent magnet assembly with MR and DC compensating bias
US5532584A (en) * 1993-08-31 1996-07-02 Eastman Kodak Company MR sensor including calibration circuit wherein signals are averaged for determining a correction factor and pole pieces are shaped to reduce field in gap therebetween
US5428491A (en) * 1993-12-03 1995-06-27 Eastman Kodak Company Magnetoresistive head with deposited biasing magnet
DE102011110138A1 (de) 2011-08-15 2013-02-21 Meas Deutschland Gmbh Messvorrichtung zum Messen magnetischer Eigenschaften der Umgebung der Messvorrichtung
DE102011120972A1 (de) * 2011-12-13 2013-06-13 Giesecke & Devrient Gmbh Verfahren und Vorrichtung zur Prüfung von Wertdokumenten

Also Published As

Publication number Publication date
DE2257029A1 (de) 1973-07-05
JPS5311174B2 (it) 1978-04-19
CA989065A (en) 1976-05-11
GB1362105A (en) 1974-07-30
JPS4874742A (it) 1973-10-08
FR2170509A5 (it) 1973-09-14
DE2257029C3 (de) 1981-10-08
DE2257029B2 (de) 1980-12-18
US3796859A (en) 1974-03-12

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