US5605768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic marker and manufacturing method therefor
Assignee: Unitika Ltd
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Filing: 1995-12-06
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Granted: 1997-02-25
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Expires: 2015-12-06
Abstract
Abstract A compact and superior magnetic marker for an electronics apparatus for surveillance of article comprises at one or more wire members and a plane member contacting substantially directly to each other. An angle of the magnetic easy axis of the plane member relative to the longitudinal direction of the wire member is between 40° and 90° to show large Barkhausen reversal. An influence of demagnetizing field can be reduced by using the simple structure. The magnetic marker can be produced continuously at a low cost.
Inventors
- 👤 Shinji Furukawa
- 👤 Kazuki Oka
- 👤 Nobuyoshi Yano
- 👤 Toshiyuki Hirano
- 👤 Isamu Ogasawara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:28
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/22; G08B13/24; G08B13/2402; G08B13/2405; G08B13/2408; G08B13/2414; G08B13/2417; G08B13/2428; G08B13/2437; G08B13/244; G08B13/2442; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/928; Y10T; Y10T428/00; Y10T428/12; Y10T428/12465
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
67 words
A magnetic marker comprising at least one wire member made of a first magnetic material and a plane member made of a second magnetic material, said plane member having uniaxial magnetic anisotropy, wherein said wire member contacts substantially to said plane member and an angle of magnetic easy axis of said plane member relative to a longitudinal direction of said wire member is between 40° and 90°.
Claim 2
Dependent Claim
67 words
A magnetic marker comprising at least one wire member made of a first magnetic material and a plane member made of a second magnetic material, said plane member having uniaxial magnetic anisotropy, wherein said wire member contacts substantially to said plane member and an angle of magnetic easy axis of said plane member relative to a longitudinal direction of said wire member is between 40° and 90°.
Claim 3
Dependent Claim
17 words
The magnetic marker according to claim 1, further comprising two sheets interposing said wire and plane members.
Claim 4
Dependent Claim
39 words
The magnetic marker according to claim 2, wherein one of the two sheets comprises a separation paper for separation of the magnetic marker, the paper being provided at a side not in contact with said wire and plane members.
Claim 5
Dependent Claim
15 words
The magnetic marker according to claim 1, wherein the angle is between 60° and 90°.
Claim 6
Dependent Claim
12 words
The magnetic marker according to claim 4, wherein the angle is 90°.
Claim 7
Dependent Claim
23 words
The magnetic marker according to claim 1, wherein the first magnetic material of said wire member includes at least 50% of amorphous phase.
Claim 8
Dependent Claim
18 words
The magnetic marker according to claim 6, wherein said plane member is made of an amorphous magnetic material.
Claim 9
Dependent Claim
17 words
The magnetic marker according to claim 7, wherein the wire member is made of an amorphous ribbon.
Claim 10
Dependent Claim
16 words
The magnetic marker according to claim 1, wherein the wire member has a circular cross section.
Claim 11
Dependent Claim
23 words
The magnetic marker according to claim 1, wherein the second magnetic material of said plane member includes at least 50% of amorphous phase.
Claim 12
Dependent Claim
40 words
The magnetic marker according to claim 1, wherein one of said sheets comprises a flexible substrate and said plane member comprises a thin film formed on the flexible substrate, the thin film having a thickness between 0.1 and 10 μm.
Claim 13
Dependent Claim
17 words
The magnetic marker according to claim 1, wherein said plane member comprises a soft magnetic crystalline material.
Claim 14
Dependent Claim
16 words
The magnetic marker according to claim 1, wherein a number of said wire members is two.
Claim 15
Dependent Claim
28 words
The magnetic marker according to claim 1, wherein said wire member making contact to said plane member substantially shows large Barkhausen reversal against a change in magnetic field.
Claim 16
Independent Claim
175 words
A method for manufacturing a magnetic marker comprising at least one wire member made of a first magnetic material and a plane member made of a second magnetic material, the method comprising the steps of: forming at least one continuous wire made of a first magnetic material continuously; forming a continuous web made of a second magnetic material which enable to have an uniaxial magnetic anisotropy; induce the magnetic easy axis of the web to have an angle between 40° and 90° relative to a longitudinal direction of the web; supplying a first sheet, the at least one continuous wire, the continuous web, and a second sheet in parallel; layering the wire, the web and the two sheets so that the wire contacts substantially to the web while the wire and the web are interposed between the two sheets; and cutting the wire and web contacting to each other in magnetic markers each comprising a wire member made of a part of the wire and a plane member made of a part of the web.
Claim 17
Independent Claim
175 words
A method for manufacturing a magnetic marker comprising at least one wire member made of a first magnetic material and a plane member made of a second magnetic material, the method comprising the steps of: forming at least one continuous wire made of a first magnetic material continuously; forming a continuous web made of a second magnetic material which enable to have an uniaxial magnetic anisotropy; induce the magnetic easy axis of the web to have an angle between 40° and 90° relative to a longitudinal direction of the web; supplying a first sheet, the at least one continuous wire, the continuous web, and a second sheet in parallel; layering the wire, the web and the two sheets so that the wire contacts substantially to the web while the wire and the web are interposed between the two sheets; and cutting the wire and web contacting to each other in magnetic markers each comprising a wire member made of a part of the wire and a plane member made of a part of the web.
Claim 18
Dependent Claim
29 words
The method according to claim 15, wherein the first or second sheet comprises a separation paper for separating the markers from the sheets interposing the wire and the web.
Claim 19
Dependent Claim
24 words
The method according to claim 15, wherein said continuous web comprises an amorphous thin film deposited on one of the first and second sheets.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-02-25 | 2000-08-26 | 2001-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-25 | 2004-08-26 | 2005-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-25 | 2008-08-26 | 2009-02-25 | $7700.00 | Window Closed / Lapsed |