A method for transmitting messages in a publishsubscribe message system. The pre-compacted material is preferably obtained by roller compaction and is suitable for use in the further processing of the pre-compacted material into composition like e. A bus user circuit is located between d. The beam path runs through the camera adaptor along a linear optical axis. The recess has a second face that engages the stop ring when the plunger moves out of the housing so as to slide it over the surface.