公开(公告)号：US10933442B2

公开(公告)日：2021-03-02

申请号：US15103565

申请日：2014-11-14

Applicant: SICPA HOLDING SA

Inventor： Mathieu Schmid ,  Claude-Alain Despland ,  Evgeny Loginov ,  Cedric Amerasinghe ,  Pierre Degott

IPC: B05D3/00 ,  B05D5/06 ,  H01F41/16 ,  B42D25/29 ,  B42D25/369 ,  B42D25/378

Abstract: The disclosure 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 disclosure provides processes for producing optical effect layers (OELs) on a substrate and OELs obtained thereof, said process including two magnetic orientation steps: a step of exposing a coating composition having platelet-shaped magnetic or magnetisable pigment particles to a dynamic magnetic field of a first magnetic-field-generating device so as to bi-axially orient at least a part of the platelet-shaped magnetic or magnetisable pigment particles, and a step of exposing the coating composition to a static magnetic field of a second magnetic-field-generating device, thereby mono-axially re-orienting at least a part of the platelet-shaped magnetic or magnetisable pigment particles.

公开(公告)号：US09834028B2

公开(公告)日：2017-12-05

申请号：US14399325

申请日：2013-04-30

Applicant: SICPA HOLDING SA

Inventor： Pierre Degott ,  Mathieu Schmid ,  Claude Alain Despland ,  Cedric Amerasinghe

IPC: G02F1/00 ,  B32B5/16 ,  B42D25/20 ,  B05D5/06 ,  B05D3/00 ,  G02B5/02 ,  B42D25/29 ,  B42D25/00 ,  C09D11/037 ,  B42D25/30 ,  B42D25/40 ,  G02B5/08 ,  G02F1/21

CPC classification number: G02F1/09 ,  B05D3/20 ,  B05D5/06 ,  B05D5/065 ,  B41M3/14 ,  B42D25/00 ,  B42D25/20 ,  B42D25/24 ,  B42D25/29 ,  B42D25/30 ,  B42D25/369 ,  B42D25/378 ,  B42D25/40 ,  B42D2033/16 ,  B42D2033/18 ,  B42D2033/20 ,  B42D2035/20 ,  C09D11/037 ,  G02B5/0257 ,  G02B5/08 ,  G02F1/0036 ,  G02F1/21 ,  G02F2001/094 ,  G02F2001/213

Abstract: The disclosure relates to the field of graphical elements and is directed to an optical effect layer (OEL), a device and a method for producing same. The disclosure provides an optical effect that is easy to detect as such and exhibits a viewing-angle dependent apparent motion of image features over an extended length if the viewing angle with respect to the OEL changes. An OEL includes a binder material being at least partially transparent and a plurality of particles dispersed within the layer. Each particle has a non-isotropic reflectivity and may be magnetic or magnetizable. The orientation of the particles forms an orientation pattern extending over a length within an extended surface of the OEL, such that the local average of an angle between (i) a straight line along an observed longest dimension within the corresponding cross-section shape, and (ii) said first direction x varies according to a function (θ) of a position (P) along said first direction.

公开(公告)号：US09933640B2

公开(公告)日：2018-04-03

申请号：US15379008

申请日：2016-12-14

Applicant: SICPA HOLDING SA

Inventor： Pierre Degott ,  Mathieu Schmid ,  Claude Alain Despland ,  Cedric Amerasinghe

IPC: G02F1/00 ,  B32B5/16 ,  G02F1/09 ,  G02B5/02 ,  B41M3/14 ,  B05D3/00 ,  B05D5/06 ,  B42D25/29 ,  B42D25/24 ,  B42D25/378 ,  B42D25/369 ,  B42D25/40

CPC classification number: G02F1/09 ,  B05D3/20 ,  B05D5/06 ,  B05D5/065 ,  B41M3/14 ,  B42D25/00 ,  B42D25/20 ,  B42D25/24 ,  B42D25/29 ,  B42D25/30 ,  B42D25/369 ,  B42D25/378 ,  B42D25/40 ,  B42D2033/16 ,  B42D2033/18 ,  B42D2033/20 ,  B42D2035/20 ,  C09D11/037 ,  G02B5/0257 ,  G02B5/08 ,  G02F1/0036 ,  G02F1/21 ,  G02F2001/094 ,  G02F2001/213

Abstract: Disclosure relates to the field of graphical elements and is directed to a device for producing an optical effect layer (OEL). Disclosure provides an optical effect that is easy to detect as such and exhibits a viewing-angle dependent apparent motion of image features over an extended length if the viewing angle with respect to the OEL changes. OEL includes a binder material being at least partially transparent and a plurality of particles dispersed within the layer. Each particle has a non-isotropic reflectivity and may be magnetic or magnetizable. Orientation of the particles forms an orientation pattern extending over a length within an extended surface of the OEL, such that the local average of an angle between (i) a straight line along an observed longest dimension within the corresponding cross-section shape, and (ii) said first direction x varies according to a function (θ) of a position (P) along said first direction.