The patent problems of hangprinter convinced me that having a list of wild ideas is key.

Laser induced forward transfer is a process in which droplets can be emitted under the influence of laser light. Typically, a laserhead is moved over a coated glass plate. Due to the influence of laser light droplets are emitted from this plate to a target substrate.  For each material the plate is changed.

Let's say I have a prism which can produce  different lines for each facet. So in the case of a quadron I can produce four lines. This prism is constructed via the input and output prism method discussed earlier.
These lines would project on a glass sheet where each area is coated with a different material suited for laser induced forward transfer.  This material would be on the side of the target substrate. Note that laser induced forward transfer works in both the upward and downward direction. The glass sheet with the coating can be placed above or below the target substrate.

The glass substrate needs to move so a new layer can be applied via blade coating and it is replenished. The glass sheet could be a rotating disk and coated in a way similar to the process used by lithoz in the cerafab.

Another option is a rotating cylinder the laser head would then be at the center of the cylinder.

This whole thing would move as a sort of laser induced forward inkjet head over the substrate.

I will add drawings for this contraption. Still it should be obvious for people having ordinary skills in the art.