A machine adapted to print an image as hereinbefore defined onto a surface of an edible substrate, the machine including a bubble-jet printer head assembly, and including a container for containing a liquid food colorant, a surface for supporting the said edible substrate, said surface and said head...http://www.google.com.au/patents/US6058843?utm_source=gb-gplus-sharePatent US6058843 - Machine and method for printing on surfaces of edible substrates
