an envelope - filling station for mail - processing systems . the station includes an enclosure feeder for transporting enclosures to an inserting arrangement pushing enclosures into envelopes in the same direction as the enclosure feeder . an envelope supply is positioned parallel to the enclosure feeding device . envelopes are diagonally transported from the envelope supply to the inserting arrangement by an intermediate transport . a movable stop , in an active state , holds an envelope received in position for insertion of enclosures . when the movable stop is changed to an inactive state the filled envelope can be conveyed away from the envelope - filing station . the movable stop has a further intermediate stop position in which the stop is moved back , by a comparatively small distance in relation to the push - in movement , such that , under the driving frictional action of the intermediate envelope - conveying device , the filled envelope comes free of the push - in arrangement in the push - in direction .