Device, system and method for producing a magnetically induced visual effect

A visual effect, magnetic induction technology, applied to the equipment of the electric recording process using the charge pattern, the copying/marking method, the electric recording process using the charge pattern, etc., which can solve registration problems, swelling, reduce paper moisture content, etc. question

Active Publication Date: 2013-05-22
SICPA HLDG SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] -Heat can reduce the moisture content of the paper, which can change the dimensions of the substrate, causing registration problems
This effect is especially critical for paper substrates and sheet feeding processes; heat can cause expansion of some mechanical components of the printing machinery, causing registration or misalignment issues; and

Method used

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  • Device, system and method for producing a magnetically induced visual effect
  • Device, system and method for producing a magnetically induced visual effect
  • Device, system and method for producing a magnetically induced visual effect

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Embodiment Construction

[0038] Figures 1 to 4a -c shows a preferred embodiment of the invention, in which an apparatus for generating magnetically induced visual effects by printing and curing security or decorative features based on orientable magnetic particles comprises an optical curing unit. Figure 5 and Figure 6Different preferred realizations of the substrate guiding system are shown which keep the substrate (thin layer) carrying the coating composition in close contact with the magnetic cylinder.

[0039] Here, the term "magnetic drum" refers to a cylinder carrying at least one magnetic field generating element capable of orienting magnetic particles to generate a visual effect. Such magnetic field generating elements are described, for example, in EP1641624, EP1937415, US2010 / 0040845 or WO2004 / 007095.

[0040] The magnetic field generating element or elements used to orient the magnetic particles may be constructed of a wide variety of magnetic materials such as, but not limited to, ne...

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Abstract

The invention relates to a device, system and method for producing magnetically induced visual effects in coatings, particularly security or decorative features, containing orientable magnetic particles. The device comprises a printing unit, an orientation means, a substrate-guiding system and a photocuring unit. The printing unit is arranged to print with the coating composition an image on a first side of a substrate. The orientation means comprises a magnetic field generating element for orienting the magnetic particles in the coating composition of the printed image. The substrate-guiding system is arranged to bring and hold the substrate in contact with the orientation means. The photocuring unit irradiates the image printed on the substrate to at least partially cure the coating composition of the image while the substrate is still in contact with the orientation means. The photocuring unit is configured such that its emission of thermal radiation energy is such limited as to not heat the orientation means to an average temperature T1 exceeding 100° C.

Description

technical field [0001] The present invention relates generally to the field of security elements for the protection of banknotes and documents of value or objects, and in particular to devices, systems and methods for producing magnetically induced visual effects in coatings containing orientable magnetic particles. Background technique [0002] 56 and WO 98 coated dies are disclosed in (for example) US2005 / 0123764, US2418479, US2570856, WO2000 / 12622, EP-A0686675, WO2008 / 153679, US2008 / 0292862, US5364689, US2004 / 0251652, DE-A2005846, US4 / 3761998 Various materials and techniques for orientation of magnetic particles in layer constituents. [0003] Orientable magnetic particles are also used in printing processes, especially for printing security and decorative features. In particular, the use of optically variable platelet-shaped magnetic particles has been disclosed to produce special visual and color shifting effects. Such devices and techniques for producing said effects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/20G03G19/00G03G21/04B41M3/14
CPCB41M7/0054G03G19/00B41M7/0045B41M5/00B41M7/0036B41M7/009G03G15/20B41M3/14G03G15/09G03G21/043B41M7/0072G03G15/2098
Inventor P·德戈特C-A·德斯普兰M·施米德
Owner SICPA HLDG SA
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