Abstract: A vapor containment apparatus for washing an ink pump and sucker tube with a volatile ink solvent has a closed receptacle with a liquid solvent sump. An elongated sleeve encases the sucker tube within the receptacle and positions an inlet end of the sucker tube in the sump. A solvent applicator directs solvent into contact with an outer surface of the sucker tube to drain into the sump and wash the outer surface. An solvent return tube delivers solvent from the ink pump to the sump such that solvent can be drawn through the sucker tube and the pump to wash the pump and the inner surface of the sucker tube. A vacuum exhaust draws solvent vapor through openings on the elongated sleeve and the return tube and evacuates the vapor from the closed receptacle.

Abstract: A rotogravure printing press includes a boundary layer air scraper which is located immediately upstream of the pinch area of the press (e.g. the area formed by the impression roller and the printing cylinder). The air scraper blocks boundary layer airflow drawn with the moving web. This reduces the solvent laden air and allows a reduction in the capacity of the scavenger system.

Abstract: A gravure printing press includes a scavenger located adjacent a pinch formed by an impression roller and a printing cylinder. The scavenger captures air drawn to the printing clinder which has become laden with solvent from ink on an outer surface of the cylinder, to minimize the dispersion of the solvent laden air to the area surrounding the press.