Patent ID: 9085157
Filing Date: 2015-07-21
Classification: B41J

Abstract:
1. A printing unit, comprising: a movable printing head comprising a nozzle plate comprising a plurality of nozzles configured to eject liquid ink; a cleaning station comprising a cleaning surface comprising at least one suction element configured to generate a suction of air, said cleaning station being configured to clean said plurality of nozzles of said printing head when said printing head is in a cleaning region in which said printing head overlaps at least partially with said cleaning station, so that said nozzle plate and said cleaning surface face each other at least partially at a predefined distance; movement actuator means configured to perform the relative translation of said printing head and said cleaning station from a first position, in which said suction element is superimposed with a first end of said nozzle plate, to a second position, in which said suction element is superimposed with a second end, opposite said first end, of said nozzle plate and vice versa, thereby carrying out said cleaning operation, and proximity sensor means configured to measure a distance between said nozzle plate and said cleaning surface in at least said first position and said second position during said cleaning operation.