Method of manufacturing a heat exchanger element

Claim 1

A method of manufacturing a heat transfer element for use in a heat exchanger wherein air or other fluid is moved in contact with tubes containing refrigerant comprising: wrapping a plurality of tubes about a forming drum in a parallel abutting position to form a plurality of helically wound coils, providing terminal leads at each end of said coils, removing the wound coils from the forming drum, bending said terminal leads toward the center longitudinal axis of said coils, locating each terminal lead in a bent position inward of the next terminal lead at each end of said coils so that said terminal leads are positioned tangent to a plane which is perpendicular to the center longitudinal axis of said helical coils, cutting off a desired portion of said terminal leads, and joining each end of said terminal leads to a header adapted to supply refrigerant to said heat transfer element.

Claim 2

A method of manufacturing a heat transfer element for use in a heat exchanger wherein air or other fluid is moved in contact with tubes containing refrigerant comprising: wrapping a plurality of tubes about a forming drum in a parallel abutting position to form a plurality of helically wound coils, providing terminal leads at each end of said coils, removing the wound coils from the forming drum, bending said terminal leads toward the center longitudinal axis of said coils, locating each terminal lead in a bent position inward of the next terminal lead at each end of said coils so that said terminal leads are positioned tangent to a plane which is perpendicular to the center longitudinal axis of said helical coils, cutting off a desired portion of said terminal leads, and joining each end of said terminal leads to a header adapted to supply refrigerant to said heat transfer element.

Claim 3

A method of manufacturing a heat transfer element for use in a heat exchanger wherein air or other fluid is moved in contact with tubes containing refrigerant comprising: wrapping two tubes about a forming drum in a parallel abutting position to form two helically interwound coils, providing terminal leads at each end of said coils, removing the wound coils from the forming drum, bending each of said terminal leads toward the center longitudinal axis of said coils, locating one terminal lead of one coil inward of the terminal lead of the second coil at each end of the coils so that said terminal leads in a bent position are positioned tangent to a plane which is perpendicular to the center longitudinal axis of said helical coils, cutting off a desired portion of each terminal lead, and joining each end of said terminal leads to a header adapted to supply refrigerant to said heat transfer element.

Claim 4

A method of manufacturing a heat transfer element for use in a heat exchanger wherein air or other fluid is moved in contact with tubes containing refrigerant comprising: wrapping two tubes about a forming drum in a parallel abutting position to form two helically interwound coils, providing terminal leads at each end of said coils, removing the wound coils from the forming drum, bending each of said terminal leads toward the center longitudinal axis of said coils, locating one terminal lead of one coil inward of the terminal lead of the second coil at each end of the coils so that said terminal leads in a bent position are positioned tangent to a plane which is perpendicular to the center longitudinal axis of said helical coils, cutting off a desired portion of each terminal lead, and joining each end of said terminal leads to a header adapted to supply refrigerant to said heat transfer element.