MX166576B - Marcador reactivable de radiofrecuencia - Google Patents

Marcador reactivable de radiofrecuencia

Info

Publication number
MX166576B
MX166576B MX003652A MX365286A MX166576B MX 166576 B MX166576 B MX 166576B MX 003652 A MX003652 A MX 003652A MX 365286 A MX365286 A MX 365286A MX 166576 B MX166576 B MX 166576B
Authority
MX
Mexico
Prior art keywords
predetermined value
radio frequency
marker
reactivable
magnetic material
Prior art date
Application number
MX003652A
Other languages
English (en)
Inventor
Samuel Montean
Original Assignee
Minnesota Mining & Mfg
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 Minnesota Mining & Mfg filed Critical Minnesota Mining & Mfg
Publication of MX166576B publication Critical patent/MX166576B/es

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2414—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using inductive tags
    • G08B13/242—Tag deactivation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V15/00—Tags attached to, or associated with, an object, in order to enable detection of the object
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G08B13/2442—Tag materials and material properties thereof, e.g. magnetic material details
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2451—Specific applications combined with EAS
    • G08B13/2457—Lending systems using EAS tags wherein the tags are reusable, e.g. they can be activated and deactivated more than once, e.g. for a library
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/01—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate comprising only passive thin-film or thick-film elements formed on a common insulating substrate

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Security & Cryptography (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Library & Information Science (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

La presente invención se refiere a un marcador reactivable de radiofrecuencia para utilizarse en un sistema electrónico para la vigilancia de artículos, que tiene un receptor para detectar oscilaciones de un circuito resonante sintonizado, cuando el factor Q asociado con el mismo excede de un valor predeterminado, caracterizado porque dicho marcador que comprende un circuito resonanate que tiene un componente inductor, y que tiene un factor Q en un estado sensibilizaod mayor que dicho valor predeterminado, y en un estado desensibilizado menor que un valor predeterminado y que incluye por lo menos una pieza de material magnético, formando un circuito magnético substancialmente alrededor de por lo menos una porción de una o más espiras del citado componente inductor, y un dispositivo para polarizar magnéticamente de manera controlada al material magnético.
MX003652A 1985-09-09 1986-09-04 Marcador reactivable de radiofrecuencia MX166576B (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/773,593 US4745401A (en) 1985-09-09 1985-09-09 RF reactivatable marker for electronic article surveillance system

Publications (1)

Publication Number Publication Date
MX166576B true MX166576B (es) 1993-01-20

Family

ID=25098753

Family Applications (1)

Application Number Title Priority Date Filing Date
MX003652A MX166576B (es) 1985-09-09 1986-09-04 Marcador reactivable de radiofrecuencia

Country Status (11)

Country Link
US (1) US4745401A (es)
EP (1) EP0215605B1 (es)
JP (1) JP2758896B2 (es)
KR (1) KR920004994Y1 (es)
AU (1) AU583936B2 (es)
CA (1) CA1261936A (es)
DE (1) DE3677439D1 (es)
ES (1) ES2001939A6 (es)
HK (1) HK64491A (es)
MX (1) MX166576B (es)
SG (1) SG61391G (es)

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Also Published As

Publication number Publication date
KR870005750U (ko) 1987-04-24
DE3677439D1 (de) 1991-03-14
US4745401A (en) 1988-05-17
AU6051786A (en) 1987-03-12
EP0215605B1 (en) 1991-02-06
HK64491A (en) 1991-08-23
ES2001939A6 (es) 1988-07-01
KR920004994Y1 (ko) 1992-07-25
EP0215605A2 (en) 1987-03-25
CA1261936A (en) 1989-09-26
AU583936B2 (en) 1989-05-11
JPS6260095A (ja) 1987-03-16
SG61391G (en) 1991-08-23
JP2758896B2 (ja) 1998-05-28
EP0215605A3 (en) 1987-12-02

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