AB Graphic Offers Short-Run Rotary Screen Capability

BOXMEER, Netherlands—A new intermittent screen printing unit, designed by Stork Prints for AB Graphic International’s 330 mm-wide Digicon Series 2 modular converting line, is proving to be a resounding success, with several orders placed in the first months of its launch.

A special feature of the unit is Stork’s patented intermittent-contact squeegee system. This eliminates the problem of mesh-stretching, by only applying downward pressure against the screen, while the mesh makes contact with the substrate. When the screen assumes the off-contact position, the squeegee pressure is immediately disengaged.

Intermittent printing systems enable substantial savings in tooling costs and changeover time. Between impressions, the web realigns itself, by making an intermittent web movement, which is adjustable according to the repeat length. In this way, a single screen or cylinder size can be used for many different print jobs.

Stork’s squeegee system also eliminates the problem of screen wear-and-tear. Bert Grootjen, program manager graphics at Stork Prints, comments, “The unit has proved so popular because it gives label converters the chance to compete successfully in short-run, high-end markets, while enjoying low consumable costs at the same time.”

Rotary screen printing is seen as a highly productive means of applying thick ink and varnish deposits. As a result, the process is ideal for high-end features that offer extra shelf impact, like high-lustre varnishes, tactile and raised image effects, brilliant opaques, the no-label look, thermo-chromic inks, and a range of brand-protecting security solutions, such as iridescent inks.

In addition to the collaboration with AB Graphic International, Stork Prints is currently developing an intermittent rotary screen unit for Barcelona-based press maker Rotatek for its 420 mm-wide Brava offset press.