公开(公告)号：US10780729B2

公开(公告)日：2020-09-22

申请号：US16684062

申请日：2019-11-14

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Kazuyo Minowa ,  Naoki Minamikawa

IPC: B42D25/435 ,  B42D25/328 ,  G02B5/18 ,  G09F19/14

Abstract: An individual certificate medium includes an optical security patch in which a relief layer and a metal layer include a first area and a second area. The first area includes an altered region and a portion of the relief layer overlapping with the altered region as viewed in the thickness direction of a recording layer. The second area includes a non-altered region and another portion of the relief layer overlapping with the non-altered region as viewed in the thickness direction. As viewed in the thickness direction, the first area transmits light incident thereon, while the second area absorbs light incident thereon to hide a recording region. In a direction intersecting the thickness direction, the first and second areas cause light incident on the optical security patch to emerge as diffracted light.

公开(公告)号：US10899162B2

公开(公告)日：2021-01-26

申请号：US16790429

申请日：2020-02-13

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Mihoko Ohkawa ,  Kazuyo Minowa

IPC: B42D25/378 ,  G06K7/14 ,  B42D25/23 ,  B42D25/24 ,  B42D25/324 ,  B42D25/328 ,  B42D25/364 ,  B42D25/373 ,  B42D25/382 ,  B42D25/387

Abstract: A laminate includes: a first laminate member; a second laminate member; and a hidden print formed by printing invisible ink between the first laminate member and the second laminate member. The hidden print is configured to absorb electromagnetic radiation outside the visible range. When irradiated with electromagnetic radiation outside a visible range that has passed through at least one of the first laminate member and the second laminate member, the hidden print absorbs the electromagnetic radiation to thereby show a sign, and, when irradiated with visible light, the hidden print does not show the sign.