Magnetic assemblies and processes for producing optical effect layers comprising oriented non-spherical magnetic or magnetizable pigment particles
US-2022144005-A1 · May 12, 2022 · US
Magnetic sheet and manufacturing method thereof
US2022101677A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022101677-A1 |
| Application number | US-202117485582-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 27, 2021 |
| Priority date | Sep 28, 2020 |
| Publication date | Mar 31, 2022 |
| Grant date | — |
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- Title
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Abstract
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A magnetic sheet includes a sheet, line-shaped N first magnetic members arranged on the sheet and having magnetic properties, and line-shaped N second magnetic members arranged on the sheet and having magnetic properties, where N denotes the number of the first magnetic members and denotes the number of the second magnetic members.
First claim
Opening claim text (preview).
What is claimed is: 1 . A magnetic sheet, comprising: a sheet; and line-shaped N first magnetic members arranged on the sheet and having magnetic properties, and line-shaped N second magnetic members arranged on the sheet and having magnetic properties, where N denotes number of the first magnetic members and denotes number of the second magnetic members; wherein one of the N first magnetic members is arranged along a second axis when viewed in a direction of a first axis that is perpendicular to a principal plane of the sheet, among the N first magnetic members, first magnetic members other than the one arranged along the second axis are arranged along third axes, number of which is denoted as (N−1), wherein the third axes are located at respective positions obtained by rotating the second axis at angular intervals of (M±5)° when viewed in the direction of the first axis, and one of the N second magnetic members is arranged along a fourth axis that is located at a position obtained by rotating the second axis by a rotation angle θ, and second magnetic members other than the one are arranged along fifth axes that are located at respective positions obtained by rotating the third axes by the rotation angle θ respectively, with the first axis taken as the center of rotation, where, N is an odd number that is equal to or greater than 3, M satisfies an equation M=(360/N)°, and θ is not M/2°. 2 . The magnetic sheet according to claim 1 , wherein an equation θ=(M/4)° is satisfied. 3 . The magnetic sheet according to claim 1 , wherein when viewed in the direction of the first axis, the N first magnetic members do not overlap with one another, the N second magnetic members do not overlap with one another, and the first magnetic members and the second magnetic members do not overlap with each other. 4 . The magnetic sheet according to claim 1 , wherein the first magnetic members and the second magnetic members exhibit a large Barkhausen effect. 5 . The magnetic sheet according to claim 1 , wherein when viewed in the direction of the first axis, extension lines of the N first magnetic members do not intersect with one another at one point. 6 . A method for manufacturing a magnetic sheet, comprising: arranging, on a sheet, line-shaped N first magnetic members having magnetic properties, where N denotes number of the first magnetic members; and arranging, on the sheet, line-shaped N second magnetic members having magnetic properties, where N denotes number of the second magnetic members; wherein in the arranging of the first magnetic members and the arranging of the second magnetic members, one of the N first magnetic members is arranged along a second axis when viewed in a direction of a first axis that is perpendicular to a principal plane of the sheet, among the N first magnetic members, first magnetic members other than the one arranged along the second axis are arranged along third axes, number of which is denoted as (N−1), wherein the third axes are located at respective positions obtained by rotating the second axis at angular intervals of (M±5)° when viewed in the direction of the first axis, and one of the N second magnetic members is arranged along a fourth axis that is located at a position obtained by rotating the second axis by a rotation angle θ, and second magnetic members other than the one are arranged along fifth axes that are located at respective positions obtained by rotating the third axes by the rotation angle θ respectively, with the first axis taken as the center of rotation, where, N is an odd number that is equal to or greater than 3, M satisfies an equation M=(360/N)°, and θ is not M/2°.
Assignees
Inventors
Classifications
the magnetic material being applied in the form of particles, e.g. by serigraphy {, to form thick magnetic films or precursors therefor} (H01F41/18 {-H01F41/24} take precedence) · CPC title
spaced apart pieces on the surface of a layer · CPC title
Magnetic, paramagnetic · CPC title
Paper of special types, e.g. banknotes · CPC title
next to a fibrous or filamentary layer · CPC title
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Frequently asked questions
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- What does patent US2022101677A1 cover?
- A magnetic sheet includes a sheet, line-shaped N first magnetic members arranged on the sheet and having magnetic properties, and line-shaped N second magnetic members arranged on the sheet and having magnetic properties, where N denotes the number of the first magnetic members and denotes the number of the second magnetic members.
- Who is the assignee on this patent?
- Seiko Epson Corp
- What technology area does this patent fall under?
- Primary CPC classification G07D7/04. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Mar 31 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).