The DuoTransferFoil with drilled roll stabilizes the web on the dryer fabric. With its use, problems such as edges peeling away, fluttering and the formation of wrinkles on the paper web are eliminated.

Web stabilization with the DuoTransferFoil is done by means of a vacuum (up to -350 Pa) that is set via the fan speed. For ropeless threading of the transfer tail, a threading zone can be separated in the system from the entire operating zone. In the threading process, suction is concentrated on the threading zone. The stabilization zone is sealed using lateral air knives and a machine-wide nozzle at the transition to the first dryer cylinder, which are provided with supply air from the DuoTransferFoil.

The DuoTransferFoil with a drilled roll is inserted between the DuoCentri NipcoFlex presses and the first dryer cylinder in order to hold the paper web on the dryer fabric. The difference compared to the TransferFoil with dryer fabric suction roll is that the drilled roll does not have an internal box, and its suction mechanism works according to the DuoStabilizer principle. This design without an internal box saves costs and no back-up roll is required.

The MultiSeal Plus seals in cross direction to the machine at the end of the release zone. The shorter release zone allows a higher vacuum during operation. It can be adjusted horizontally to compensate for wear of the sealing strips for a longer life cycle of the strips. In addition, ProRelease HighEnd features backside sealing in cross direction to stabilize the paper sheet when it runs off the stabilizer roll up to the next dryer.

ProRelease HighEnd includes an automatic cleaning device that cleans the holes of the stabilizer roll with compressed air. This ensures good performance of the stabilizer roll and helps extend the roll service intervals. Due to its mechanical sealing, the ProRelease HighEnd has lower energy consumption compared to competitor products. The arrangement of the exhaust ducts on the drive side ensures optimum visibility of the web run and improved ease of maintenance of the ProRelease HighEnd.

ProRelease HighEnd is used in the first dryer groups of single-tier dryer sections on high-speed paper machines producing low basis weights.

Separation is carried out with a securely installed separation disk in the roll, an additional air knife in the stabilization zone, and a flap that separates the suction area of the operating zone from the threading zone. In the threading process, suction is concentrated on the threading zone. The additional air knife is fed with supply air, and the operating zone is switched off. After threading, the air knife is depressurized, and the operating zone is activated. The negative pressure of the DuoStabilizer is set with the fan speed. Manual alignment of the individual DuoStabilizers can be done with a manual flap in the suction line.

The DuoStabilizer allows a stable and wrinkle-free web run in the dryer section from dryer cylinder to dryer cylinder. Web tension and shrinkage are thus reduced; in addition, the speed can be increased.

In the scope of rebuilds to paper machines with a single-tier dryer that use suctioned rolls (known as dryer fabric suction rolls, DFSR), the DuoFoil can be installed over the DFSR in order to stabilize the web. With stabilization zones, the DuoFoil supports wrinkle-free sheet edges from dryer cylinder to dryer cylinder. The negative pressure in the stabilization zone is created via the "pre-suction" zone in the DFSR. This increases the runability of the paper machine.

The web is stabilized by means of negative pressure (-100 to -200 Pa) in the stabilization zone. The DuoFoil does not have its own connection to the vacuum system, but rather is supplied through the vacuum of the DFSR. The negative pressure of the DuoFoil therefore depends on the vacuum setting of the DFSR. The stabilization zone is sealed off by the MultiSeal and the lateral air knives. The MultiSeal is a mechanical sealing system that ensures high negative pressures with low energy requirements. With this system the seal strips can be replaced quickly and easily (including parts set behind the framing). Air knives are used for sealing on the sides in order to compensate for the deflection of the dryer fabrics and to prevent wear of the dryer fabric. There is also a seal (Teflon plate) to the roll provided.

For the ropeless threading of the transfer tail, a threading zone can be separated in the system. This separation is created using flaps that are activated automatically during the threading. As a result, the transfer tails are held securely on the dryer fabric with negative pressure in the threading zone during the ropeless threading. This increases the reliability of the machine and reduces the threading time.

The VentiPipe hot air blow pipe improves ventilation in the fabric loops of the dryer group and removes moisture more efficiently. Hydrolysis on the dryer fabrics is prevented.

VentiPipe is connected to the air supply system of the dryer section. Hot, dry air is brought into the dryer group via exhaust openings. More air is blown out in the center of the machine; a transverse flow thus arises from the center of the machine to the edges. The hot, dry air absorbs the water vapor and removes it. The number of VentiPipes used depends on the number of drying cylinders in a dryer group and the hood balance. Taken as a whole, VentiPipe contributes to improved conditioning of the dryer fabric, since less dirt remains due to continuous drying.

The VentiPipe hot air blow pipe is placed in single-tier dryer groups in the upper fabric loop above the drying cylinders.