NL170342C - MAGNETISABLE RECORD MEDIUM AND METHOD OF MANUFACTURE THEREOF. - Google Patents

MAGNETISABLE RECORD MEDIUM AND METHOD OF MANUFACTURE THEREOF.

Info

Publication number
NL170342C
NL170342C NL7016325A NL7016325A NL170342C NL 170342 C NL170342 C NL 170342C NL 7016325 A NL7016325 A NL 7016325A NL 7016325 A NL7016325 A NL 7016325A NL 170342 C NL170342 C NL 170342C
Authority
NL
Netherlands
Prior art keywords
manufacture
record medium
magnetisable
magnetisable record
medium
Prior art date
Application number
NL7016325A
Other languages
Dutch (nl)
Other versions
NL7016325A (en
NL170342B (en
Original Assignee
Emi Ltd
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 Emi Ltd filed Critical Emi Ltd
Publication of NL7016325A publication Critical patent/NL7016325A/xx
Publication of NL170342B publication Critical patent/NL170342B/en
Application granted granted Critical
Publication of NL170342C publication Critical patent/NL170342C/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
    • G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
    • G06K19/12—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards the marking being sensed by magnetic means
    • 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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/842—Coating a support with a liquid magnetic dispersion
    • G11B5/845—Coating a support with a liquid magnetic dispersion in a magnetic field

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Magnetic Record Carriers (AREA)
  • Credit Cards Or The Like (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)
NL7016325A 1969-11-14 1970-11-06 MAGNETISABLE RECORD MEDIUM AND METHOD OF MANUFACTURE THEREOF. NL170342C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5578769 1969-11-14

Publications (3)

Publication Number Publication Date
NL7016325A NL7016325A (en) 1971-05-18
NL170342B NL170342B (en) 1982-05-17
NL170342C true NL170342C (en) 1982-10-18

Family

ID=10474880

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7016325A NL170342C (en) 1969-11-14 1970-11-06 MAGNETISABLE RECORD MEDIUM AND METHOD OF MANUFACTURE THEREOF.

Country Status (5)

Country Link
JP (1) JPS4937529B1 (en)
DE (1) DE2055357C3 (en)
FR (1) FR2069355A5 (en)
GB (1) GB1331604A (en)
NL (1) NL170342C (en)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4960624U (en) * 1972-09-06 1974-05-28
US3878367A (en) * 1973-05-02 1975-04-15 Minnesota Mining & Mfg Magnetic security document and method for making same
US4237189A (en) * 1973-10-31 1980-12-02 Robert J. Deffeyes Polymodal magnetic recording media process for making and verifying the same and compositions useful therein
GB1510105A (en) * 1974-04-17 1978-05-10 Emi Ltd Printing
US4186944A (en) 1974-04-17 1980-02-05 Emi Limited Security document
GB1519142A (en) * 1974-07-04 1978-07-26 Emi Ltd Detection of magnetic patterns
US4197989A (en) * 1974-10-16 1980-04-15 Emi Limited Magnetic recording
US4114029A (en) * 1974-10-16 1978-09-12 E M I Limited Magnetic recording
DE2752895A1 (en) 1976-12-06 1978-06-08 Emi Ltd METHOD FOR PRODUCING A MATERIAL LAYER, THE SURFACE OF WHICH HAS A SCANABLE PATTERN, AS WELL AS A SECURITY DOCUMENT SYSTEM
GB1593377A (en) * 1976-12-10 1981-07-15 Emi Ltd Security document and system
JPS6057130B2 (en) * 1977-01-14 1985-12-13 富士写真フイルム株式会社 Manufacturing method for multilayer magnetic recording tape
JPS53160436U (en) * 1977-05-21 1978-12-15
US4242400A (en) * 1977-10-15 1980-12-30 E M I Limited Magnetically structured materials
EP0024800A1 (en) * 1979-08-04 1981-03-11 EMI Limited Security document and system
DE2950174A1 (en) 1979-12-13 1981-06-19 Basf Ag, 6700 Ludwigshafen METHOD AND DEVICE FOR CHECKING THE AUTHENTICITY OF RECORDING CARRIERS TO BE SECURED AGAINST COUNTERFEITING
DE2950129A1 (en) 1979-12-13 1981-06-19 BASF Corp., New York, N.Y. METHOD AND DEVICE FOR CHECKING THE AUTHENTICITY OF RECORDING CARRIERS TO BE SECURED AGAINST COUNTERFEITING
JPS56117336A (en) * 1980-02-19 1981-09-14 Sony Corp Manufacture of magnetic recording medium
JPS56119938A (en) * 1980-02-22 1981-09-19 Sony Corp Production of magnetic recording medium
EP0025636A3 (en) * 1980-07-07 1981-06-10 General Kinetics, Incorporated Perpetuation of information in magnetically recorded medium
EP0094775B1 (en) * 1982-05-18 1989-01-04 EMI Limited A method of preparing and reading information which is permananently recorded on a magnetic layer
US4743490A (en) * 1986-02-24 1988-05-10 Minnesota Mining And Manufacturing Company Counterfeit-resistant magnetic recording tape
US4985614A (en) * 1987-01-16 1991-01-15 Rand Mcnally & Company Object verification apparatus and method
US4906988A (en) * 1987-01-27 1990-03-06 Rand Mcnally & Co. Object verification system and method
US5216229A (en) * 1989-06-05 1993-06-01 Rand Mcnally & Company Verifiable object having incremental key
DE3938055A1 (en) * 1989-11-16 1991-05-23 Merck Patent Gmbh MATERIALS COATED WITH PLAIN-SHAPED PIGMENTS
US5177344A (en) * 1990-10-05 1993-01-05 Rand Mcnally & Company Method and appparatus for enhancing a randomly varying security characteristic
US5480685A (en) * 1993-10-22 1996-01-02 Tomoegawa Paper Co., Ltd. Method of making a magnetic recording medium comprising two magnetic layers
DE4439455A1 (en) * 1994-11-04 1996-05-09 Basf Ag Process for the production of coatings with three-dimensional optical effects
GB2309568B (en) * 1996-01-25 1999-09-29 Central Research Lab Ltd Method of identifying a data carrier
GB9621000D0 (en) * 1996-10-09 1996-11-27 Flying Null Ltd Magnetic tags and techniques
GB2319644B (en) 1996-11-23 2000-01-12 Central Research Lab Ltd A record carrier
PL340378A1 (en) 1997-11-10 2001-01-29 Thorn Secure Science Ltd Method of labelling goods
DE10149126A1 (en) 2001-10-05 2003-04-10 Flexchip Ag Production of a screen used for a transponder comprises applying ferromagnetic particles to a region of the substrate having the spatial expansion of the antenna structure of a transponder, aligning the ferromagnetic particles, etc.
AT504444A1 (en) * 2002-11-28 2008-05-15 Hueck Folien Gmbh SECURITY ELEMENTS WITH COMBINED FEATURES TO BE RECOGNIZED BY MACHINE
US7950587B2 (en) 2006-09-22 2011-05-31 The Board of Regents of the Nevada System of Higher Education on behalf of the University of Reno, Nevada Devices and methods for storing data

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2796359A (en) * 1952-07-05 1957-06-18 Audio Devices Inc Production of magnetic sound recording tape
US3430200A (en) * 1967-06-30 1969-02-25 Walter W Barney Validator apparatus for magnetic credit cards and the like

Also Published As

Publication number Publication date
NL7016325A (en) 1971-05-18
JPS4937529B1 (en) 1974-10-09
DE2055357B2 (en) 1980-11-13
NL170342B (en) 1982-05-17
DE2055357C3 (en) 1981-08-27
FR2069355A5 (en) 1971-09-03
DE2055357A1 (en) 1971-05-27
GB1331604A (en) 1973-09-26

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Legal Events

Date Code Title Description
V4 Lapsed because of reaching the maxim lifetime of a patent