US 12,115,793 B2
Method for changing at least one printing fluid, and method for cleaning and/or maintaining at least one printing fluid supply system, and printing press
Joachim Keupp, Rimpar (DE); Marius Malina, Eußenheim (DE); Christian Michel, Geroldshausen (DE); Andreas Rumpel, Eussenheim (DE); and Patrick Walter, Kirchzell (DE)
Assigned to KOENIG & BAUER AG, Würzburg (DE)
Appl. No. 18/289,395
Filed by KOENIG & BAUER AG, Würzburg (DE)
PCT Filed May 12, 2022, PCT No. PCT/EP2022/062879
§ 371(c)(1), (2) Date Nov. 3, 2023,
PCT Pub. No. WO2023/006271, PCT Pub. Date Feb. 2, 2023.
Claims priority of application No. 10 2021 119 858.5 (DE), filed on Jul. 30, 2021.
Prior Publication US 2024/0269983 A1, Aug. 15, 2024
Int. Cl. B41J 2/17 (2006.01); B41J 2/185 (2006.01)
CPC B41J 2/1707 (2013.01) [B41J 2/1728 (2024.05); B41J 2/185 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for changing printing fluid of at least one printing fluid supply system of a printing press, at least one printing unit of the printing press comprising at least one print head, the method comprising:
selectively supplying one of at least one first printing fluid or at least one second printing fluid from at least one supply unit of the at least one printing fluid supply system to the at least one print head, the at least one supply unit comprising at least one reservoir of the at least one first printing fluid and at least one reservoir of the at least one second printing fluid, the at least one supply unit further comprising at least one intermediate tank of the at least one first printing fluid arranged between the at least one reservoir of the at least one first printing fluid and the at least one print head in a flow direction of the at least one first printing fluid, the at least one supply unit further comprising at least one intermediate tank of the at least one second printing fluid arranged between the at least one reservoir of the at least one second printing fluid and the at least one print head in a flow direction of the at least one second printing fluid, wherein the at least one first printing fluid or the at least one second printing fluid is selectively supplied from its a respective at least one intermediate tank to the at least one print head during the selectively supplying, and
transferring the one of the at least one first printing fluid or the at least one second printing fluid previously supplied to the at least one print head back into the respective at least one intermediate tank prior to supplying the other one of the at least one first printing fluid or the at least one second printing fluid to the at least one print head, wherein no return of the printing fluid from the respective at least one intermediate tank to a respective at least one reservoir is provided.