Amway Corporation

Aluminum Filter Company

Charles G Hart

Paul J Kudirka

Bradford L Baker

Air filter case

A low labor-intensive method and construction for joining first and second planar sheets of plastic at respective edges thereof at right angles to one another without the use of adhesives or solvents. A first lip is formed extending along the edge to be joined of the first planar sheet at right angles thereto. A second lip is formed extending along the edge to be joined of the first planar sheet at right angles thereto. A plurality of guide pins extending outward from the first lip along the length thereof and perpendicular thereto. A plurality of guide pin receiving blocks are formed disposed between the second lip and the second sheet along the length of the edge thereof and disposed to be opposite one of the guide pins when the first and second edges are abutted with the first lip abutting the second sheet and with the inner and outer edges of the second lip parallel to the outer edge of the first lip. The guide pin receiving blocks each has a guide pin receiving bore therein aligned for receiving a respective one of the guide pins. A plurality of staple receiving blocks are formed disposed intermediate the guide pins between the first lip of the first sheet along the length of the edge thereof and sized to receive and hold the legs of a U-shaped staple therein. Finally, a plurality of staple gun alignment guides are formed disposed between the second lip of the second sheet along the length of the edge thereof and opposite ones of the staple receiving blocks. The staple gun alignment guides are positioned to receive and contact the sides and inner end of a staple gun and position the gun to insert a staple into a staple receiving block disposed opposite thereto in horizontal and vertical alignment therewith. To assemble such a joint, the guide pins are inserted into the bores to place the two sheets in alignment for fastening. A staple gun is inserted into each of the staple gun alignment guides and a staple driven through the second sheet into the staple receiving block opposite.

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Carpinteria, CA, United States of America

Charles G Hart