Patent ID: 11892190
Assignee: DUST FREE, LP
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 14:
15. A method comprising:
assembling a pair of first quadrilateral panels to a pair of second quadrilateral panels to form a heating, ventilation and air conditioning air conveyance apparatus, comprising:
inserting a right-angle flange extending from each of a pair of opposite edges of each of the first quadrilateral panels into a hemmed cleat defined along each of a pair of opposite edges of each of a respective one of the second quadrilateral panels; and
securing each of the first quadrilateral panels to the respective one of the second quadrilateral panels with a fastener received through a pilot hole defined through a projecting lip of the hemmed cleat of each of the second quadrilateral panels into the right-angle flange extending from the respective one of the first quadrilateral panels.