KR920013203A - Anti-modulation device of magnetic card - Google Patents

Anti-modulation device of magnetic card Download PDF

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Publication number
KR920013203A
KR920013203A KR1019900022606A KR900022606A KR920013203A KR 920013203 A KR920013203 A KR 920013203A KR 1019900022606 A KR1019900022606 A KR 1019900022606A KR 900022606 A KR900022606 A KR 900022606A KR 920013203 A KR920013203 A KR 920013203A
Authority
KR
South Korea
Prior art keywords
recording medium
magnetic card
modulation device
auxiliary head
plane
Prior art date
Application number
KR1019900022606A
Other languages
Korean (ko)
Other versions
KR0185982B1 (en
Inventor
이동철
Original Assignee
이헌조
주식회사 금성사
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 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR1019900022606A priority Critical patent/KR0185982B1/en
Publication of KR920013203A publication Critical patent/KR920013203A/en
Application granted granted Critical
Publication of KR0185982B1 publication Critical patent/KR0185982B1/en

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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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers

Abstract

내용 없음No content

Description

자기카드의 위, 변조 방지장치On magnetic card, tamper proof device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제7도는 본 발명 주헤드와 보조헤드의 설치상태를 나타낸 도면, 제8도는 본 발명 보조헤드에 의한 출력파형도, 제9도는 카드를 짜깁기 하였을때의 각 경우 사시도.Figure 7 is a view showing the installation state of the main head and the auxiliary head of the present invention, Figure 8 is an output waveform diagram by the auxiliary head of the present invention, Figure 9 is a perspective view in each case when weaving a card.

Claims (1)

잔류자속밀도가 주기적 또는 비주기적으로 변화하고 이 주기 또는 비주기 변화를 감지하여 전위를 판별하는 자기기록매체에 있어서, 기록매체의 면과 일치하는 평면상에서 기록매체의 이송방향에 대하여 경사진 각도로이동하는 보조헤드와, 상기 보조헤드로부터 출력신호를 감지판별하여 카드의 위, 변조를 감식하는 수단을 구비하여서 이루어짐을 특징으로하는 자기카드의 위, 변조 방지장치.In a magnetic recording medium whose residual magnetic flux density changes periodically or aperiodically and detects this period or aperiodic change, the magnetic recording medium has an inclined angle with respect to the conveying direction of the recording medium on a plane coincident with the plane of the recording medium. And an auxiliary head for moving, and means for sensing an output signal from the auxiliary head to sense the modulation on the card. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019900022606A 1990-12-31 1990-12-31 Forgery preventing device of magnetic card KR0185982B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019900022606A KR0185982B1 (en) 1990-12-31 1990-12-31 Forgery preventing device of magnetic card

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019900022606A KR0185982B1 (en) 1990-12-31 1990-12-31 Forgery preventing device of magnetic card

Publications (2)

Publication Number Publication Date
KR920013203A true KR920013203A (en) 1992-07-28
KR0185982B1 KR0185982B1 (en) 1999-04-15

Family

ID=19309078

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019900022606A KR0185982B1 (en) 1990-12-31 1990-12-31 Forgery preventing device of magnetic card

Country Status (1)

Country Link
KR (1) KR0185982B1 (en)

Also Published As

Publication number Publication date
KR0185982B1 (en) 1999-04-15

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