Chill Roll Pinning Takes Scrap to the Mat

Two and a half years later, United Litho's $10,000 investment in three electrostatic bonding systems from SIMCO (one on a 5-unit M130, and two on a double-web 8-unit M130) has reduced its paper consumption—typically 1 million to 1.2 million lbs. per month—by 1 percent to 1.5 percent, Naquin estimates. Each SIMCO system consists of a charge bar mounted right across the chill roll and a variable voltage power supply. After a bit of experimentation, press operators have established optimum voltages to hold the ribbons in place during folding (50 percent to 75 percent of charge) and sheeting (25 percent to 50 percent of charge) operations, and simply dial the voltage up or down accordingly. Operators' focus can now shift back to the quality of the printed product, Naquin sums up.