Invention Grant
- Patent Title: Processes for producing optical effects layers
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Application No.: US17264229Application Date: 2019-06-18
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Publication No.: US11577273B2Publication Date: 2023-02-14
- Inventor: Neda Nikseresht Ghanepour , Edgar Mueller , Mathieu Schmid , Claude-Alain Despland
- Applicant: SICPA HOLDING SA
- Applicant Address: CH Prilly
- Assignee: SICPA HOLDING SA
- Current Assignee: SICPA HOLDING SA
- Current Assignee Address: CH Prilly
- Agency: Muncy, Geissler, Olds & Lowe, P.C.
- Priority: EP8186285 20180730
- International Application: PCT/EP2019/065982 WO 20190618
- International Announcement: WO2020/025218 WO 20200206
- Main IPC: B05D5/06
- IPC: B05D5/06 ; B05D3/00 ; B42D25/364 ; B42D25/369 ; C09D4/00 ; C09D133/08 ; C09D163/00 ; H01F1/14 ; H01F7/02 ; B42D25/23 ; B42D25/29 ; B44F1/08 ; C08K5/56
Abstract:
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 two or more nested indicia using a magnetic assembly comprising i) a soft magnetic plate (x31) comprising a) one or more voids (V) and b) one or more indentations (I) and/or one or more protrusions (P), and ii) one or more dipole magnets (x32).
Public/Granted literature
- US20210308718A1 PROCESSES FOR PRODUCING OPTICAL EFFECTS LAYERS Public/Granted day:2021-10-07
Information query
