e where the transport belt exchange is to occur a stabilizer device 31 may be provided which prevents a jamming of spooler 3 as shown in fig2 a carrier device 19 may include two parts for example carrier device 19 may include a first e g lower carrier element 33 and a second e g upper carrier element 35 the length of carrier device 19 may be e g sufficiently long to extend across an entire width of the paper production machine run or the width of the transport belt when the exchange of the transport belt begins exchange device 1 and carrier device 19 may be brought guided to an exchange location and placed adjacent to the transport belt to be exchanged and perpendicular to the transport belt running direction carrier elements 33 and 35 shown from an end view of the elements in a longitudinal direction of carrier device 19 may be longitudinally shifted relative to each other through suitable guide devices 37 39 and 41 for example carrier element 35 may be extended rolled into the paper production machine i e beneath an underside of the transport belt to be changed and locked in place anchored then carrier element 33 may be extended rolled into the paper production machine under the guidance of carrier element 35 and locked in place as shown in fig2 carrier elements 33 and 35 may be provided with a driver 43 45 in order to simplify the shifting or extending of the carrier elements into the paper production machine respective drivers 43 45 may include drive devices 47 and 49 and or shaft stumps 51 and 53 which may be attached to a suitable driver guide devices 37 39 and 41 may include rails 55 57.