In an aircraft there is customarily provided, for receiving a load in the cargo compartment, a cargo deck that comprises a plurality of ball mats, floor panels or similar flat floor elements. The first handhold portion has a posterior end posterior in the conveying direction. Additionally, the agitator members comprise a plurality of rotating shafts which are parallel to each other and othogonal to the direction of advance of said forming wire. A tag issuing unit 42 issues a tag 10 having recorded the passenger’s ID and the baggage ID. The filter andor map may be destroyed or stored. The semi-light-shielding portion and the light-transmitting portion transmit exposure light in the same phase, whereas the peripheral portion transmits exposure light in a phase opposite to that of the light-transmitting portion.