Patent ID: 8469692

Claim:
Apparatus for producing an object by sequentially forming thin layers of a construction material one on top of the other responsive to data defining the object, the apparatus comprising: a movable set comprising multiple printing heads, each having a surface formed with a plurality of output orifices offset from each other in a first direction by a first distance, the plurality of printing heads of the set being placed in order in a second, scan, direction substantially perpendicular to the first direction; and a controller adapted to scan the movable set with respect to a support surface in the second, scan, direction and to control the printing heads to dispense the construction material through each of their respective orifices responsive to the data, such that each orifice dispenses material along a construction line separated by said first distance from the line along which a neighboring orifice in a same head dispenses its material, wherein each of the heads that deposits construction material, deposits construction material along a set of lines that are displaced relative to a set of lines deposited by other heads by a different multiple of a ratio between the first distance and number of the printing heads in the multiple set.