passes in certain sections the longitudinal groove passes completely through the articulation rail and the crosspiece of the cover profile has a greater depth in these regions application_number US 64993307 A description as can be seen in fig1 floor strip 1 consists of a base profile 2 which has a lateral flange 3 with which it is fixed in place on the floor furthermore two shanks 4 that are molded on and are directed upward proceed from base profile 2 which shanks are rounded on the inside and serve as articulation bearings 5 in articulation bearing 5 an articulation rail 7 is held by rounded inside surfaces 6 of shanks 4 so as to rotate articulation rail 7 is laterally adapted to the rounded regions of inside surface 6 of shanks 4 and has a groove 8 that is open toward the top into which a crosspiece 9 of a cover profile 10 engages which is molded onto the underside of cover profile 10 cover profile 10 has two lateral wings 11 one of which could be angled away if cover profile 10 is used as an edge delimitation with the two edges 12 cover profile 10 grasps the floor coverings not shown which form a join at the abutment point which join is bridged by cover profile 10 crosspiece 9 engages into the groove 8 of articulation rail 7 in order to hold itself or at least to give cover profile 10 a good guide in the vertical direction when the profile is pressed onto the floor covering in order to make it possible for cover profile 10 to be pressed more deeply onto base profile 2 and for crosspiece 9 not to sit on the bottom of groove 8 in articulation rail 7 articulation rail 7 is configured.