- 专利标题： Assemblies and processes for producing optical effect layers comprising oriented magnetic or magnetizable pigment particles
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申请号： US17264141申请日： 2019-07-26
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公开(公告)号： US12020864B2公开(公告)日： 2024-06-25
- 发明人: Neda Nikseresht Ghanepour , Mathieu Schmid , Claude-Alain Despland , Edgar Mueller
- 申请人： SICPA HOLDING SA
- 申请人地址： CH Prilly
- 专利权人： SICPA HOLDING SA
- 当前专利权人： SICPA HOLDING SA
- 当前专利权人地址： CH Prilly
- 代理机构： Muncy, Geissler, Olds & Lowe, P.C.
- 优先权： EP 186284 2018.07.30
- 国际申请： PCT/EP2019/070204 2019.07.26
- 国际公布： WO2020/025482A 2020.02.06
- 进入国家日期： 2021-01-28
- 主分类号： H01F41/16
- IPC分类号： H01F41/16 ; B41M3/14 ; B41M7/00 ; B42D25/369 ; B42D25/378 ; B42D25/41 ; H01F7/02 ; B42D25/23 ; B42D25/29
摘要：
The invention relates to the field of the protection of security documents such as for example banknotes and identity documents against counterfeit and illegal reproduction. In particular, the present invention provides processes for optical effect layers (OEL) exhibiting one or more indicia using a magnetic assembly comprising i) a soft magnetic plate (x31) comprising a) one or more voids (V) and b) one or more dipole magnets (x32-a), wherein the one or more dipole magnets (x32-a) are disposed within the one or more voids (V) and/or are facing said one or more voids (V), and/or one or more pairs of two dipole magnets (x32-b), wherein the dipole magnets (x32-b) of the one or more pairs are disposed below the soft magnetic plate (x31) and are spaced apart from the one or more voids (V).
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