US 11,938,716 B2
Refrigeration unit for a printing machine and printing machine
Renzo Melotti, Sala Monferrato (IT)
Assigned to BOBST BIELEFELD GMBH, Bielefeld (DE)
Appl. No. 17/633,860
Filed by BOBST BIELEFELD GMBH, Bielefeld (DE)
PCT Filed Jul. 22, 2020, PCT No. PCT/EP2020/070699
§ 371(c)(1), (2) Date Feb. 8, 2022,
PCT Pub. No. WO2021/028177, PCT Pub. Date Feb. 18, 2021.
Claims priority of application No. 19020477 (EP), filed on Aug. 15, 2019.
Prior Publication US 2022/0396068 A1, Dec. 15, 2022
Int. Cl. B41F 23/04 (2006.01); B41F 31/00 (2006.01)
CPC B41F 23/0443 (2013.01) [B41F 31/002 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A printing machine comprising:
a printing unit adapted for printing on a web of carrier material, the printing unit including a printing drum;
a dryer unit adapted for drying the web of carrier material; and
a refrigeration unit comprising:
a coolant circuit having:
a first coolant circuit portion at least partially located inside the printing drum of the printing unit, wherein the first coolant circuit portion is adapted for absorbing heat originating from the printing drum of the printing unit, and
a second coolant circuit portion positioned in the dryer unit or adjacent to the dryer unit, wherein the second coolant circuit portion is adapted for delivering heat to the dryer unit,
wherein the refrigeration unit is adapted to transfer heat from the first coolant circuit portion adapted for absorbing heat originating from the printing drum to the second coolant circuit portion adapted for delivering heat to the dryer unit.