Macrowave Radio Frequency Co.

Vertical Radio Frequency Web Dryers for On-Press Drying of Water Based Coatings, Adhesives and Inks


  • Wet areas on the web are selectively heated and dried, while dry areas absorb little or no energy.

  • Aqueous materials can be dried in the shortest line length to production speed of any drying method known.

  • Energy saving. The electrical power consumed by the dryer automatically adjusts to the amount of water present on the web.
  • Instant-on R.F. power eliminates start-up delays.

  • Requires a fraction of the floor space of conventional dryers.

  • Highest productivity is achieved with aqueous materials. Solvent emission and disposal problems are eliminated.

2 side vertical dryer
Macrowave™ 980 Series Vertical Dryer


  • Convenient access doors facilitate web threading.

  • Waste heat from the RF generator is channeled through the applicator to scavenge moisture released by Macrowave™ drying.

  • Solid State controller provides soft-start and maintains power at preselected level.
  • Optional auto-threading system is available to minimize make-ready time.

  • The Macrowave™ dryer is designed to comply with OSHA standards and FCC regulations.

Principle of R.F. Drying

An RF Dryer works very much like a microwave oven which creates high frequency vibration of water molecules which thereby selectively heats materials containing water while other materials heat very little.


Macrowave™ drying is ideal for water-based materials: permanent adhesives, remoistenable glues, pressure sensitive glues, and heat activatable glues. Continuous envelopes, business forms, labels, mailers, catalog inserts, and packaging materials are typical product applications.

Full-coverage or pattern coatings are efficiently dried. Examples are: gloss coatings on packaging and publications materials, carbonless coatings on business forms, barrier coatings and ink adhesion coatings on plastic film.

Water-based inks can be dried on the Model 980 series units. Single or double pass systems are available for drying at each print station or ad the end of the press.

Process Development assistance is available at RFC's laboratory testing facility, which is equipped with the Macrowave™ OmniTherm™ Simulator.

Founded in 1946, Radio Frequency Company specializes in developing and manufacturing high frequency heating systems to improve efficiency in many industrial applications. RFC is a technological leader in the development of R.F. heat processing systems and is known for the highest standards of quality in equipment and service.

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