ESA Electrostatic Printing Assist

ELTEX GNH61

Top Loading

The ESA electrostatic printing assist ensures the complete and accurate ink transfer onto paper, carton or film surfaces in gravure printing, safely avoiding missing dots especially in light and middle tone ranges. It also allows the printing density to be enhanced.

The ESA GNH61 controls the charge distribution on the impression roller and the substrate webs and can so improve discharging of the ink-filled cells and the printing quality

ELTEX GNN75

Core Charging

The infeed paper or film web is discharged by the discharge bar to eliminate any existing residual static charges. The required charge for the generation of the nip voltage will be fed directly via the bearing of the impression roller. The electric connection is made by a ball spring contact. The impression roller has to be insulated from surrounding press parts. The nip voltage (300...900 V DC) causes the ink to transfer from the cells to the substrate with point-to-point accuracy and without high impression roller pressure.

The discharge bar mounted on the outlet side eliminates any residual charges on the surface of paper or the film. A 1-layer impression roller is used for the ESA GNN75 system. The impression roller guarantees the even distribution of the charge in the printing nip.

• Improved printing quality (eliminating missing dots)
• Higher production speeds
• Less wear on the impression rollers by reducing the mechanical contact force
• Suitable for use with any currently available solvents such as:
  
  • Toluene
  • Spirit-water mixture
  • Water