Patent ID: 8584426

Claim:
A removably engageable window binder system, comprising: an inner sash having a first wall configured to be adjacent a first surface of a glazing; an outer sash having a first wall configured to be adjacent a second surface of the glazing that is spaced from and parallel to the first surface of the glazing; a binder extending along a perimeter of the outer sash and the inner sash, the binder removably engaging the outer sash and the inner sash and mechanically coupling the outer sash and the inner sash together, the binder comprising a first protrusion and a second protrusion parallel to the first protrusion, respectively mating with a first groove located completely in the inner sash that extends in a direction parallel to planes defined by the first surface of the glazing and a second groove parallel to the first groove and located completely in the outer sash, each protrusion comprising a plurality of flexible barbs that are compressed when the protrusion mates with one of the grooves, the flexible barbs providing a force on opposing interior edges of the groove coupling the inner sash and outer sash together, and wherein the first and second protrusions extend respectively along substantially the entire perimeter of the inner sash and the outer sash.