In one aspect, a back plane for use in flat panel displays is provided. The structural member is stored at a first position and at a second position in an unfixed state in the storage space that is caused to be in the covered state by the cover member. The material that is coated with catalyst material is provided in the form of a dimensionally stable catalyst body which is inserted into the interior such that it adjoins the formed body. The functions include one or more physical activities performed by an implement, connected to the machine, in the work area.