Inking mechanism in off-set printer has ultra sound transmitter producing ultrasonic vibrations in exposed surface section carrying wetting agent to atomise same

摘要

The inking mechanism includes an ultra sound transmitter (17) set up to excite an exposed surface section (13) carrying wetting agent into ultrasonic vibrations to disperse wetting agent. The surface section forms part of the ink conveyor stretch and the excited surface section extends over the entire printing width of the printer. The excited surface section can be strip-like and the ultrasound transmitter focuses the ultrasound onto the surface section through an air gap. The surface section can be part of an inking roller where the transmitter is set up inside the roller.