US 12,466,191 B2
Printing unit with tandem inkjet modules
David Oliver Burke, North Ryde (AU); Mark Profaca, North Ryde (AU); Robert John Brice, North Ryde (AU); and Peter Crichton, North Ryde (AU)
Assigned to Memjet Technology Limited, Dublin (IE)
Filed by Memjet Technology Limited, Dublin (IE)
Filed on Apr. 28, 2023, as Appl. No. 18/309,328.
Claims priority of provisional application 63/476,671, filed on Dec. 22, 2022.
Claims priority of provisional application 63/377,240, filed on Sep. 27, 2022.
Claims priority of provisional application 63/348,445, filed on Jun. 2, 2022.
Claims priority of provisional application 63/348,449, filed on Jun. 2, 2022.
Prior Publication US 2023/0391081 A1, Dec. 7, 2023
Int. Cl. B41J 2/17 (2006.01); B41J 2/165 (2006.01); B41J 2/175 (2006.01); B41J 2/30 (2006.01); B41J 25/304 (2006.01); B41J 25/34 (2006.01)
CPC B41J 2/1752 (2013.01) [B41J 2/16508 (2013.01); B41J 2/16535 (2013.01); B41J 25/304 (2013.01); B41J 25/34 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A printing unit comprising:
a unit chassis; and
first and second opposed inkjet modules mounted in tandem on the unit chassis in forward and reverse orientations, each inkjet module having one respective printhead,
wherein:
each printhead comprises first and second rows of print chips mounted on a unitary surface of a respective ink manifold, the first and second rows of print chips comprising a plurality of print chips butted end-on-end along a length of the printhead;
the printheads are wholly aligned with respect to a media feed direction for printing in four ink colors from the pair of printheads;
the second inkjet module in the reverse orientation is rotated by 180 degrees relative to the first inkjet module in the forward orientation; and
the first row of print chips in one printhead redundantly prints two colors of ink via a plurality of aligned nozzle rows for each color and the second row of print chips in said printhead redundantly prints the same two colors via a plurality of aligned nozzle rows for each color.