Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Reexamination Certificate
2007-04-10
2007-04-10
Mayes, Melvin (Department: 1734)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
C283S072000, C283S086000, C283S090000, C283S091000, C283S101000, C283S103000, C359S002000
Reexamination Certificate
active
10503493
ABSTRACT:
The present invention provides a discrimination medium A for discriminating the authenticity of an article by providing an optically discriminating mark on the article. A film20having a light reflecting layer of a polymer cholesteric liquid crystal having a circular polarization light selectivity for reflecting a specific circular polarization light is fixed to a part of the surface of a support10. A printed portion is made by printing on the portions other than the film20of the support10in substantially the same color as that shown when the film20is viewed from the front. The discrimination medium A appears to be red at the support10and the film20when viewed from the front (although the film has a metallic luster), but at a larger viewing angle, the film20changes to blue by the blue-shift of the polymer cholesteric liquid crystal so as to exhibit a color different from that of the support10.
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Hoshino Hidekazu
Sasaki Mutsumi
Takeuchi Itsuo
Mayes Melvin
NHK Spring Co. Ltd.
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