Entrust Corporation

Ethan Yanna

Daniel Sarkinen

Scott Svensson

Bruce Klemann

Don Galles

Techniques are described for reducing or eliminating a bow in a plastic card that results from applying radiation, such as UV radiation, to a surface of the plastic card to cure radiation curable material that has been applied to the surface. In one embodiment, after printing of all radiation curable material on the plastic card is completed, radiation is applied to both surfaces of the plastic card. After applying the radiation, the plastic card complies with ISO 7810:2019, Clause 8.10.

Plastic card printing with radiation curable material and multiple curing passes

Thermal printing on plastic cards where the energization of each individually energizable heating element of a thermal printhead is adjusted based on a temperature of the thermal printhead and a density of the pixel to be printed. For each pixel, the printhead temperature and the pixel density of a pixel to be printed are used to adjust the strobe pulse length that energizes the heating element to print that pixel. By compensating for both printhead temperature and pixel density, a tighter tolerance of the resulting printed densities is achieved.

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Shakopee, MN, United States of America

Ethan Yanna