E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
E06C—LADDERS
E06C1/00—Ladders in general
E06C1/02—Ladders in general with rigid longitudinal member or members
E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
E06C1/39—Ladders having platforms; Ladders changeable into platforms
E06C1/393—Ladders having platforms foldable with the ladder
Perfectionnement a une installation et procede d'entrainement de chariots sur rails, notamment pour le rangement et la mise en place de rangees de sieges