Glue and Fold Softening for Web Presses
Since 1988 Valco Melton has been supplying RoBondPRO fine-line gluing and fold-softening systems to leading printers and press
manufacturers.
The entire RoBondPRO™ system can be operated from the centrally located touchscreen with an intuitive graphical interface. The RoBondPRO™ system offers motorized positioning of dispensing valves across the web. Valve positioning to the web is servo-adjustable to 0.1mm (0.004”) accuracy.
As speeds change, pressure regulators adjust and precisely control the amount of fluid that is applied to the web. Since application pressure is synchronized with press speed, finished product can be glued or softened from set-up to production speeds.
Featuring an automatically dosed fold softening solution, problems with cracking and brittle paper at the fold are eliminated. Reduced
spine bulk, flatter bundles are produced thereby improving stacking, stitching and stapling operations.
In glue and fold-softening processes, either water or a softening solution is added to the paper. This process remoistens the often over-dried paper to prevent the paper from becoming brittle and also prevents the paper from breaking. By adding water or softening solution to the glue content, you prevent the adhesive from drying out between jobs; this is usually done through the process of flushing.
