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Magnetic plate for printing of optical effects

一种印刷板、薄板的技术，应用在用于印刷光学效果的磁板领域，能够解决防伪文件不可行等问题

Active Publication Date: 2007-05-23
VIAVI SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The color shifting properties of images printed with the device described in EP1493590 make the use of magnetic color shifting inks to print security documents essentially infeasible

Method used

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  • Magnetic plate for printing of optical effects
  • Magnetic plate for printing of optical effects
  • Magnetic plate for printing of optical effects

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0075] [75] Referring now to prior art Figures 1a through 1f, Figure 1a shows an engraved magnet for forming a print in a substrate coated with wet ink or paint comprising magnetically aligned Granules or flakes. After the substrate is coated with ink or paint, a magnet 10 is placed under the substrate and the flakes in the ink or paint align along the field lines to form the numeral "20". In Figure 1c, reflective flakes, such as Ni, have a silver-like appearance in a blue carrier vehicle, and the reflective flakes are arranged to form the number "20". The flakes appear to be a moldy color, and the flakes in the background of the "20" and in the number itself have a dark appearance. This is because the flakes are upright and all that is visible in the spaces between the upright flakes is the dark blue carrier medium. A similar effect is illustrated in Figure 1d, where color-changing flakes are applied. The magnetic field in Figure 1f radiates from the engraving magnet and p...

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PUM

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Abstract

This invention discloses a magnet for use as a printing plate or printing head that is used for aligning flakes or particles in a paint or ink. A composite sheet or block of magnetizable material is selectively magnetized so that a magnet is formed within the sheet or block that has a shape of a predetermined image, logo, or indica. Dies are used to magnetize the magnetizable material and preferably the does contact the material to be magnetized. A pre-magnetized sheet such as a refrigerator magnet may be re-magnetized differently so that a magnetic image is encoded therein for use as a printing plate. Preferably the printing plate is flexible so that it can be formed to a curved surface of a cylinder or drum for printing. Conveniently these flexible magnets can be changed for other deisgins and placed on the same drum for use in printing.

Description

technical field [0001] [1] The present invention generally relates to magnets having magnetically aligned particles or flakes for use in printing inks and paints, and in particular, the present invention relates to the formation of a magnet having magnetic materials aligned in a plurality of different directions depending on an applied field , and the application of the magnet as a printing plate. [0002] [2] The term "sheet" hereafter in this specification is used to mean a flat and thin plate, and, in a preferred embodiment, is used to mean a flexible sheet; however, the term "sheet" does not mean It doesn't stop there. [0003] [3] The term "plate" is used throughout this specification to mean a rigid or elastic plate, and includes thin and flat elastic sheets, such as synthetic magnetizable sheets or rubber magnetic sheets, which when magnetized are usually Known as "refrigerator" magnets. [0004] [4] Hereinafter the term "printing plate" is used as a plate for formin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M3/00B41M3/14B05D3/00B05D5/06H01F13/00
CPCB41C1/1058G11B5/855H01F13/003B41C1/00B05D5/06B41N1/04B05D3/207B05D3/14B05D3/06
Inventor 凡拉帝米尔·P.·瑞克沙杰伊·M.·霍尔曼保罗·G.·库马斯尼尔·泰特鲍姆查尔斯·T.·麦肯特斯
Owner VIAVI SOLUTIONS INC
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