US Patent 10047558 Retractable flexible-panel door

A retractable, flexible-panel door is mountable to a door frame attached to a building and includes a first side rail, a second side rail, a top rail mountable to and between the first and second side rails, and a bottom rail mountable to and between the first and second side rails. A flexible panel extends between the top and bottom rails, and at least one biasing member draws the flexible panel toward one of the first and second side rails. The top and bottom rails are each axially expandable and reducible in length to accommodate mounting of the retractable, flexible panel door to door frames of different widths.