INK FILM THICKNESS/MOISTURE CONTENT MEASURING DEVICE

摘要

PURPOSE:To provide a device to measure an ink film thickness and a moisture content on an ink roller, usable for various kinds of ink, e.g. black ink, based on dielectric constants of air, ink, and water. CONSTITUTION:An ink film thickness and moisture content measuring device comprises a means 1 to measure a distance (a) between a reference point and the surface of a metallic roller to be measured, a means 3 to measure a distance (b) between a reference point and the surface of a mixture liquid layer of ink and water adhered to the roller, a means 2 to measure electrostatic capacity C between a reference point and the surface of the metallic roller to be measured, and a computing device 6 to effect computation from the displacement (a), the displacement (b), and the electrostatic capacity C and calculate an ink film thickness and a moisture content from which disturbance owing to eccentricity and vibration of the roller is removed.