US 12,391,046 B2
Method of cleaning nozzle surfaces of an inkjet print head assembly
Sven Butschko, Hockenheim (DE); and Rene Stückroth, Heidelberg (DE)
Assigned to Heidelberger Druckmaschinen AG, Heidelberg (DE)
Filed by Heidelberger Druckmaschinen AG, Heidelberg (DE)
Filed on Jun. 5, 2023, as Appl. No. 18/328,899.
Claims priority of application No. 22188456 (EP), filed on Aug. 3, 2022.
Prior Publication US 2024/0042765 A1, Feb. 8, 2024
Int. Cl. B41J 2/165 (2006.01)
CPC B41J 2/16552 (2013.01) [B41J 2/16523 (2013.01); B41J 2002/16558 (2013.01); B41J 2002/16567 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for cleaning nozzle surfaces of an inkjet print head assembly, the method comprising:
providing a cleaning slide including an ultrasonic cleaning device, a suction device, and a rinsing device;
using the cleaning slide to carry out a movement along the assembly and clean the nozzle surfaces with a cleaning liquid in ultrasonic vibration;
carrying out the movement of the cleaning slide with a forward movement and a backward movement;
during the forward movement, activating the ultrasonic cleaning device and activating the suction device following the ultrasonic cleaning device, while keeping the rinsing device deactivated following the two;
during the backward movement, activating the rinsing device and activating the suction device following the rinsing device, while deactivating the ultrasonic cleaning device following the two;
emitting a rinsing liquid from the activated rinsing device;
emitting the cleaning liquid from a chamber; and
emitting the rinsing liquid from a different further chamber being open towards inkjet print heads of the inkjet print head assembly.