IT7822172A0 - Dispositivo di lettura di informazioni magnetiche. - Google Patents

Dispositivo di lettura di informazioni magnetiche.

Info

Publication number
IT7822172A0
IT7822172A0 IT7822172A IT2217278A IT7822172A0 IT 7822172 A0 IT7822172 A0 IT 7822172A0 IT 7822172 A IT7822172 A IT 7822172A IT 2217278 A IT2217278 A IT 2217278A IT 7822172 A0 IT7822172 A0 IT 7822172A0
Authority
IT
Italy
Prior art keywords
reading device
information reading
magnetic information
magnetic
reading
Prior art date
Application number
IT7822172A
Other languages
English (en)
Other versions
IT1109814B (it
Original Assignee
Cii Honeywell Bull
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 Cii Honeywell Bull filed Critical Cii Honeywell Bull
Publication of IT7822172A0 publication Critical patent/IT7822172A0/it
Application granted granted Critical
Publication of IT1109814B publication Critical patent/IT1109814B/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
    • G11B5/3903—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 using magnetic thin film layers or their effects, the films being part of integrated structures
    • G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
    • G11B5/3945—Heads comprising more than one sensitive element
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K1/00—Methods or arrangements for marking the record carrier in digital fashion
    • G06K1/12—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching
    • G06K1/125—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching by magnetic means
    • 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
    • G06K7/082—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 using inductive or magnetic sensors
    • G06K7/087—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 using inductive or magnetic sensors flux-sensitive, e.g. magnetic, detectors
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0007—Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Measuring Magnetic Variables (AREA)
  • Magnetic Heads (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
IT22172/78A 1977-05-13 1978-04-11 Dispositivo di lettura di informazioni magentiche IT1109814B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7714661A FR2390778A1 (fr) 1977-05-13 1977-05-13 Dispositif de lecture d'informations magnetiques

Publications (2)

Publication Number Publication Date
IT7822172A0 true IT7822172A0 (it) 1978-04-11
IT1109814B IT1109814B (it) 1985-12-23

Family

ID=9190763

Family Applications (1)

Application Number Title Priority Date Filing Date
IT22172/78A IT1109814B (it) 1977-05-13 1978-04-11 Dispositivo di lettura di informazioni magentiche

Country Status (8)

Country Link
US (1) US4184631A (it)
JP (1) JPS5842900B2 (it)
BR (1) BR7802557A (it)
ES (1) ES467766A1 (it)
FR (1) FR2390778A1 (it)
GB (1) GB1603553A (it)
IT (1) IT1109814B (it)
NL (1) NL7802749A (it)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443733A1 (fr) * 1978-12-08 1980-07-04 Thomson Csf Tete de lecture magnetique et lecteur muni d'une telle tete
JPS58154615A (ja) * 1982-03-10 1983-09-14 Copal Co Ltd 磁気検出装置
US4639584A (en) * 1985-07-25 1987-01-27 Adams Robert T Non-alterable magnetic coding
US4962437A (en) * 1988-02-24 1990-10-09 Magnetic Peripherals Inc. Thin film servo head employing the inactive transducer coils to cancel write noise from nearby data heads
US4954803A (en) * 1988-03-18 1990-09-04 Yamaha Corporation Magnetic-resistor sensor and a magnetic encoder using such a sensor
US5266786A (en) * 1991-10-01 1993-11-30 Ncr Corporation Magnetoresistive head for reading magnetic ink characters
US20060110023A1 (en) * 2004-11-24 2006-05-25 Goetz Ronald J Document validation device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509535A (en) * 1966-06-09 1970-04-28 Arcs Ind Inc Ferromagnetic recognizer of documents
US3959824A (en) * 1970-11-30 1976-05-25 Tohoku Metal Industries Limited Two gap read/write head assembly
US3945038A (en) * 1971-12-22 1976-03-16 Compagnie Internationale Pour L'informatique Read-write magnetoresistive transducer having a plurality of MR elements
FR2165206A5 (it) * 1971-12-22 1973-08-03 Cii
US3796859A (en) * 1971-12-27 1974-03-12 Ibm Magnetic ink recording system to both magnetize and read ink
NL7405727A (nl) * 1974-04-29 1975-10-31 Philips Nv Magnetoweerstandkop.
GB1519142A (en) * 1974-07-04 1978-07-26 Emi Ltd Detection of magnetic patterns
US4072994A (en) * 1974-12-28 1978-02-07 Canon Kabushiki Kaisha Read-after-write head
NL168981C (nl) * 1975-04-15 1982-05-17 Philips Nv Magnetoweerstand leeskop.
US4008493A (en) * 1975-07-11 1977-02-15 Pizzuto John N Magnetic head structure with minimum feedthrough
US4087789A (en) * 1977-04-27 1978-05-02 Burroughs Corporation Magnetic ink character recognition system

Also Published As

Publication number Publication date
ES467766A1 (es) 1978-11-16
GB1603553A (en) 1981-11-25
IT1109814B (it) 1985-12-23
DE2820835C2 (de) 1983-03-24
FR2390778A1 (fr) 1978-12-08
JPS5842900B2 (ja) 1983-09-22
FR2390778B1 (it) 1980-02-01
US4184631A (en) 1980-01-22
DE2820835A1 (de) 1978-11-23
NL7802749A (nl) 1978-11-15
JPS53141544A (en) 1978-12-09
BR7802557A (pt) 1978-12-26

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