Thermal Transfer Overprinters

Thernal Transfer Overprinters or coders print high quality information and variable data, bar codes and images at 300dpi quality onto flexible packaging such as polypropylene, coated aluminium, papers, labels and tyvek films and labels and is used in a wide range of manufacturing and packaging applications in the food, pharmaceutical and industrial sectors.

Key Benefits

  • High speed printing for flexible packaging
  • Clean technology that can be used in all production environments
  • Extremely high print quality (300dpi) allowing high definition bar codes and graphics
  • Large print area allows pack printing as well as coding in the same operation
  • Reliable and simple to use
  • Large ribbon range offers a wide selection of print properties including resistance to scratch, heat and solvents
  • Monochrome printing in a wide range of colours
  • Ribbon control technology maximises uptime

How It Works

Thermal Transfer Printing is achieved by placing a thermal ribbon between a heated printhead and the substrate to be marked. With the three items in contact, the printhead is moved over the length of both the ribbon and the substrate. Heat from the printhead is passed through the ribbon, causing ink to melt and be released from its underside. The ink adheres to the substrate and then cools rapidly, resulting in a permanent print.

The printhead typically comprises 300 individually controlled, miniature heating elements per inch across its width. A printed image can be created by rapidly turning these elements on (hot) and off (cold) as the printhead moves over the ribbon. Software is used to convert the printed design into signals to control the printhead. Domino Thermal transfer overprinters can operate in two modes depending upon how the printhead is moved relative to the ribbon and substrate. These are intermittent and continuous modes.  All Domino’s printers are capable of printing in both modes.

Thermal Transfer Overprint Continuous Mode
In continuous mode the substrate is moved continuously. The printhead is stationary and prints while the substrate is moving.

Thermal Transfer Overprint Intermittent Mode
In this printing mode the substrate is moved intermittently. The printhead is moved over the substrate by the printer while the substrate is stationary.