Printing is by an array of color-printing elements or nozzles in order to produce interlaced color printing while printing each line only once with each color. Print head array configurations for printing two, three and four colors include linear and parallel arrays. In one embodiment, a first color...http://www.google.de/patents/US5079571?utm_source=gb-gplus-sharePatent US5079571 - Interlaced printing using spaced print arrays
