INNOVATIVE ROLLER COOLING SYSTEM IN OFFSET PRINTING PROCESS.

摘要

In traditional Offset printing, machine works on principle of lithography which requires an image career in form of plate. Where proper ink-water balance is to be maintained so as to achieve desired print quality. Copper coated metallic rollers are used for spreading ink through inking system. Thermal expansion of rollers caused due to uninterrupted running of machines shows ill affects the ink film thickness. The rollers which are in contact with plate and finally with paper have been modified to accommodate coolant flow. The chilled water is circulated at a temperature which will give the desired surface temperature and wire insert gives the uniform temperature distribution along the length.