An endless conveyor for a festoon steamer, said conveyor serving for the movement of support rods for vertically hanging loops of a textile web, in which a portion of the path of the conveyor consists of a horizontal track; the extremities of the supporting rods are carried in support members from the conveyor and are deposited on the beginning of this track. The same rods are picked up again at the end of the track by said conveyor; The support members each contain two movable bolts for locking the supporting rods. A double cam at both ends of the track serves for actuating the locking bolts independently of each other.