Patent ID: 7328589

Claim:
A cover for covering the exterior of a through-wall air-conditioner installation comprising: a sheet of material having a shape that provides a rectangular main wall for covering a rectangular outer face of the through-wall air-conditioner installation and four side walls that are folded inward from the rectangular main wall for covering respective sides of the installation and joined to cooperate with the rectangular main wall in forming four distinct corners for fitting to four corners of the installation, a hem that runs along the inner edge margins of the side walls and encloses an elastic cord that elongates to a stretched condition to allow the cover to fit over the exterior end of the installation for placing the side walls in overlapping relation to the sides of the installation and that exerts a holding force for holding the hem against the four sides of the installation, wherein the sheet of material has a pattern that when initially cut from flat stock material provides each side wall as a respective rectangular flap adjoining a respective side of the rectangular main wall, with each side edge of each flap being at a right angle to a respective adjacent side edge of each adjacent flap, and with the side walls folded inward, a margin of each side edge of each flap and a margin of the adjacent side edge of each adjacent flap are in mutual face-to-face confrontation.