Claim 14 lines 2-3 inciudes the limitation `a door divided into a hanging door and a door-end door' (3 different recitations of `door', not including `door device', then line 4 refers to "the door", Throughout the rest of the claims, there are references to "door" (door opening force, door closing force, load acting on the door, door stop piece, door in line 4 of claim 19) which do not cleariy identify which door is being referred to. Which door - there is very unclear antecedent basis, Further "a door closer" is not clear-which door does it close?