Title:
COUNTERFEIT-PREVENTING STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2017/057723
Kind Code:
A1
Abstract:
This counterfeit-preventing structure comprises: a discoloring part having a characteristic of changing from a first material to a second material by irradiation with laser beams, the discoloring part including a discolored part that is constituted only by the second material and that includes first information; and a foaming part having a characteristic of changing from a non-foamed state to a foamed state by irradiation with laser beams, the foaming part including a foamed part that includes second information which is correlated with the first information and which constitutes, together with the first information, an information group unique to the counterfeit-preventing structure. In a planar view opposing the discolored part and the foamed part, at least a portion of the discolored part does not overlap the foamed part.
Inventors:
YAMADA SHIZUKA (JP)
Application Number:
PCT/JP2016/079108
Publication Date:
April 06, 2017
Filing Date:
September 30, 2016
Export Citation:
Assignee:
TOPPAN PRINTING CO LTD (JP)
International Classes:
B42D25/41; B23K26/00; B23K26/57; B32B5/18; B41M5/26; B42D25/328; B42D25/36; B42D25/40; G03H1/02
Foreign References:
| JP2013188966A | 2013-09-26 | |||
| JP2003147297A | 2003-05-21 | |||
| JPH1035157A | 1998-02-10 | |||
| JP2002362068A | 2002-12-18 |
Other References:
See also references of EP 3357706A4
Attorney, Agent or Firm:
ONDA, Makoto et al. (JP)
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