Patent ID: 7256805

Claim:
A thermal printer assembly comprising: at least one print head for printing an image on a receptor surface of a print media; a print media transport device configured and arranged to advance said print media; an indexing device configured and arranged to measure advancement of said print media, said indexing device being operative for generating an index signal each time said print media is advanced a predetermined distance; and a control device, in electronic communication with said indexing device and said print head, said control device being configured and arranged to receive said index signal from said indexing device, to track an elapsed time between receipt of each of said index signals and to generate a print signal responsive to said index signal, said print signal having a print head activation duration that is proportionally corrected in overall activation length responsive to said elapsed time between sequential index signals, said at least one print head being configured and arranged to receive said print signal and to print an image responsive to said print signal.