Rieter Machine Works, Ltd.

Konrad Boos

Armin Wirz

Vittorino Arnosti

Rolf Widmer

Felix Graf

Bruno Gemperle

Emil Munz

Rodolf Leinhard

Richard Rollin

A drawing roller unit is constructed with a godet and an electric motor mounted on a common shaft. A passage is provided throughout the unit to convey a non-flammable scavenging gas through the motor and the godet to reduce the risk of explosion due to sparking by the electric motor and/or other electrical parts of the drawing roller. The gas introduced can leave the unit only through a narrow gap. The pressure of the gas is consequently above atmosphere pressure and prevents the entrance of air.

Drawing roller unit with scavenging means

The drawroll unit has a heatable galette in which the shaft of the gallette is mounted in bearings which, in turn, are mounted via vibration damping devices in a stationary housing. The vibration damping devices may be in the form of bodies of interlaced wire, O-rings or the like. The vibration damping devices serve to damp vibrations of the shaft in a critical speed range within the normal speed range of the rotor so that the galette can be operated at any speed within the normal speed range.

Drawroll unit

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Sirnach, Switzerland

Konrad Boos