Here's how it works:

After the printed sheet is transferred to the gripper bars in the chain delivery, it passes under a three lamp "dry bar". The lamps are parallel to increase the exposure time of the paper to the infrared (IR) light, and the housing is designed to optimize the radiant energy delivered to the paper. The IR energy is absorbed by the ink and paper and converted to heat. A very thin "skin" of dry ink is immediately formed on the outer surface of each dot of ink, creating ink bubbles that will help prevent "set-off" in the stacking area of the delivery.

The heated sheet is then dropped onto the delivery stack where the cumulative heat from all the sheets in the stack works to complete the drying process. The heat retained in the stack accelerates the reactions that dry the ink (oxidation, polymerization and vaporization). As a rule, the speed of these reactions doubles with every 18° F (10° C) increase in temperature. Stated another way; increasing the paper temperature by 18° F from the feeder to the delivery stack will cut the drying time in half. A 36° increase will cut the drying time by about 75%.

Designed for safe and easy operation:

Just turn on the power switch. The CoolDry will do virtually all the rest. Because the CoolDry is fully integrated with the press, the operator need only to set the desired stack temperature. Automatically, the unit maintains the preset stack temperature regardless of the press speed or the ink coverage. In the rare case of a malfunction, multiple safety circuits disable the lamps immediately to prevent any problems in the chain delivery.