Patent · US Active

Method of producing micro-image elements on a substrate

US11167580B2 · kind B2 · utility

0Cited by

1References

15Claims

0Family size

Assignee

CCL Secure Pty Ltd · AU

Inventors

Karlo Ivan Jolic · Whittlesea, AU
Gary Fairless Power · Penrith, GB

Key dates

Filing date	Dec 27, 2019
Grant date	Nov 9, 2021
Priority date	—
Expiry date	Dec 27, 2039

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB42D25/425
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

Embodiments relate to producing micro-image elements on a substrate for a security document, the method comprising: producing a plurality of microstructure units comprising three-dimensionally structured formations in a clear or pale relief layer on the substrate; and applying a coloured ink fluid to the relief layer, wherein the coloured ink fluid accumulates preferentially in regions of high surface curvature on each microstructure unit to provide contrasting areas of different ink density.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.