Patent ID: 8069897

Claim:
A fast door capable of closing an opening in a wall, comprising: a structure having two jambs, in each of which a track is formed, and a transverse lintel element; and a flexible screen canvas connected to the structure through the lintel element by electromechanical means controlling a lowering and raising of the screen, the screen incorporating at least one flexible reinforcing bar inserted in receiving means formed in the screen, and the flexible reinforcing bar being engageable at its two ends in the corresponding tracks and being able to bend and come out of at least one track without suffering permanent deformation, wherein the door further comprises screen contact detecting means connected to at least one of the flexible reinforcing bars, wherein the detecting means is external of the bar and within the respective receiving means and can exhibit a state of normal operation when the bar is straight and a state of abnormal operation when the bar is bent owing to a contact with the screen.