APPARATUS FOR PREVENTING COUNTERFEITING AND ALTERATION

摘要

An apparatus for preventing counterfeiting and alteration according to the present invention includes a magnetic changeable substance carrier part containing a magnetic changeable substance to vary reflected or transmitted light rays as an applied magnetic field is varied; a magnetic field generation part for generating a magnetic field applied to the magnetic changeable substance; and a moveable part for varying at least one of the intensity, direction and pattern of the magnetic field applied to the magnetic changeable substance according to an externally applied stimulus so as to change the appearance of the magnetic changeable substance.

主权项

1. A counterfeit and alteration prevention apparatus comprising:
a magnetically responsive substance container to contain a magnetically responsive substance in which a reflected light or a transmitted light is changed when a magnetic field applied thereto is changed; a magnetic field generator to generate a magnetic field capable of being applied to the magnetically responsive substance; and a movable part to perform a function of changing an indication state of the magnetically responsive substance, wherein the movable part is moved, rotated or deformed in response to a given external stimulus to change at least one of an intensity, a direction and a pattern of the magnetic field generated by the magnetic field generator and applied to the magnetically responsive substance.