Abstract: The invention relates to a device for measuring color, luster and undulations on lacquered freeform surfaces at a predetermined target distance and symmetrically in relation to the measuring point normal lines at a measuring point. Said device is characterized by the provision of a measuring head that can be displaced in three dimensions by at least one motor and that comprises a measuring-head axis, a light emitter and a video camera. The light emitter is provided with a planar light pattern that is to be emitted along its illumination axis. An evaluation unit is provided for the light pattern (reproduction pattern) of the light emitter that is reproduced in the video camera, said evaluation unit emitting a control signal which is dependent on and formed from the distortion produced or the migration of the reproduction pattern.

Abstract: The invention relates to a device for measuring colour, lustre and undulations on lacquered freeform surfaces at a predetermined target distance and symmetrically in relation to the measuring point normal lines at a measuring point. Said device is characterised by the provision of a measuring head that can be displaced in three dimensions by at least one motor and that comprises a measuring-head axis, a light emitter and a video camera. The light emitter is provided with a planar light pattern that is to be emitted along its illumination axis. An evaluation unit is provided for the light pattern (reproduction pattern) of the light emitter that is reproduced in the video camera, said evaluation unit emitting a control signal which is dependent on and formed from the distortion produced or the migration of the reproduction pattern.

Abstract: A method and device for preparing a wet concrete mix. An elongated tubular swirl chamber has a generally cylindrical shaped interior. A shaft extends axially in the chamber and is adapted for rotation at about 100 r.p.m. or higher. The chamber contains an inlet end for the introduction of dry particles pneumatically carried by a pressurized gas and an outlet end. Blades are arranged in several rows circumscribing the shaft so that the blades overlap to form a helical spiral to aid in moving the particles through the chamber. The blades in the helical spiral form a turbulent swirling distribution of particles traveling through the chamber when the shaft is rotated at 100 r.p.m. or higher and simultaneously the particles are forced by the pressurized gas through the chamber. A liquid is injected into the turbulent swirling distribution so as to wet the particles.