Modular radial impeller drum for printing devices

A cooler module of a printing device, comprising:

• at least one modular radial impeller drum;
• and
• at least one blower coupled to an end of the first modular radial impeller drum to provide an air flow across a length of the at least one modular radial impeller drum, wherein the at least one modular radial impeller drum maintains the air flow at a constant velocity across the length of the at least one modular radial impeller drum, wherein the at least one modular radial impeller drum comprises a plurality of impeller modules, wherein each one of the plurality of impeller modules, comprises:
• a cylindrical outer surface;
• a cylindrical center axis inside of the cylindrical outer surface;
• and
• a plurality of impeller blades coupled between the cylindrical outer surface and the cylindrical center axis, wherein each one of the plurality of impeller blades are angled, wherein the plurality of impeller modules are coupled together such that the plurality of impeller blades of each one of the plurality of impeller modules are aligned across a length of the at least one modular radial impeller drum.

A modular radial impeller drum for cooling print media in a printing device, comprising:

• a plurality of impeller modules coupled together to form a surface to transport the print media that has a length that is approximately equal to a width of the print media, wherein each one of the plurality of impeller modules are casted from aluminum and comprises:
• a cylindrical outer surface having an alignment feature on each edge of the cylindrical outer surface;
• a cylindrical center axis inside of the cylindrical outer surface;
• and
• a plurality of impeller blades coupled between the cylindrical outer surface and the cylindrical center axis, wherein each one of the plurality of impeller blades are angled, wherein the plurality of impeller modules are coupled together such that the alignment feature of adjacent impeller modules are coupled together such that the plurality of impeller blades of each one of the plurality of impeller modules are aligned across the length of the modular radial impeller drum, wherein the plurality of impeller modules are coupled together via center shaft that runs through the cylindrical center axis of the each one of the plurality of impeller modules and at least one locking nut coupled to an end of the center shaft and an outermost impeller module.