Crane Company

Eric M Ziegler

Nancy J Gettens

Nicholas G Pearson

Pazam Subramanian

A security document () includes a substrate () having a first surface and a second surface opposite to the first surface, the first surface having a cellulosic material. The security document further includes an optical security device () having optical indicia of authenticity of the security document and a third surface, the third surface having a thermoplastic polymer. The security document also includes an ultrasonic weld () forming a bond between a section of the first surface and a section of the third surface.

Ultrasonic bonding of security device to a substrate to prevent harvesting

An IR and/or UV machine-readable optical security device (e.g., micro-optic security thread) that is made up of at least one IR-absorbing component with a characteristic IR signature detectable at two or more IR-wavelengths, at least one UV-absorbing component with a characteristic UV signature detectable at two or more UV-wavelengths, at least one IR-absorbing component that absorbs IR light and emits light at a different invisible wavelength, at least one UV-absorbing component that absorbs UV light and emits light at a different invisible wavelength, or a combination thereof, is provided. The IR and UV machine-readable features do not interfere with the optical effects projected by the optical material.

Growing community of inventors

Lexington, MA, United States of America

Eric M Ziegler