Patent ID: 7882850

Claim:
A fabric structure comprising: a fabric wall panel of the fabric structure defining a plane of the panel and defining side edges of the wall panel; an opening in the fabric wall panel; a fabric closure panel for closing the opening having a hinge line along one side connecting the closure panel to the wall panel; wherein the fabric wall panel at the opening and the fabric closure panel each define an edge thereof opposite to the hinge line which is curved from an end at the hinge structure around to an opposite end at the hinge structure with the edge of the fabric closure panel overlapping the edge of the fabric wall panel at the opening for closure thereon; wherein the fabric closure panel when closing the opening lies substantially in a common plane with the plane of the fabric wall panel; the hinge line being spaced from an adjacent side edge of the wall panel; a flexible bowing strip attached to the edge of the fabric closure panel opposite to the hinge line, which bowing strip is forced into a bowed shape from an initial different shape such that the flexible bowing strip tends to return to the initial shape generating forces in the bowing strip biasing ends of the bowing strip apart; and wherein the flexible bowing strip is attached to the edge of the closure panel such that the forces in the bowing strip biasing the ends of the bowing strip apart act to apply tension to the closure panel tending to maintain the panel flat.