Powder transport device for e.g. rapid prototyping installations, comprises screen running over bottom of powder reservoir and up shaft

摘要

Powder is carried on a screen (1) made to travel over the bottom of a powder reservoir (3) and then up a shaft. A device for transporting a powder comprises a screen which is made to travel over the bottom of a powder reservoir and then up a shaft. An Independent claim is also included for a device used to flatten a powder bed, comprising at least one tensioned elongated element rotating about an axis parallel to these elements whilst they and the axis are moved horizontally over the bed.