Paper Cooling

A heat pipe cools the fused paper immediately after it exits the fusing unit.
Layered fins on the end of the heat pipe form a baffle exposed to air blown through them to dissipate heat absorbed from the paper.

• The paper on the paper transport belt (3) passes under the heat pipe (2).
• The heat pipe has an intricate system of small capillary tubes filled with water running along the inside of the paper cooling pipe.
• The hot paper leaving the fusing unit heats the parts of the cooling pipe that it touches. This heats the water inside the tubes.
• The principle of heat transference moves the heated water to toward the cooler rear end of the cooling pipe where where a heat sink with fins (4) is attached.
• The fins of the baffle conduct heat away from the water in the pipe. Air moving around the fins dissipates the heat into the air.
• Paper cooling fans (1) in the duct dissipate the heat around the fins.