A door sliding along the wall is a well-known principle of door opening. The structure of the system can be with one and two wings, where the latter is made both inside and outside of a doorway. In the two-wing system, door leaves are on one line within the doorway, and each leaf, when opened, hides inside the wall.
ANIMATION OF THE “COUPE” SYSTEM
SERIES OF DOORS, TO WHICH THE "COUPE" SYSTEM CAN BE APPLIED