Patent ID: 6916393

Claim:
A method of producing a multilayered endless medium conveying belt having an electrically conductive electrode pattern on an outer circumferential surface of the belt and an electrode protective layer on an outer circumferential surface of the electrode pattern, comprising the steps of: preparing a laminated source material film composed of a plurality of layers including a layer of nonthermoplastic polyimide film and a layer of thermoplastic resin; forming one electrode pattern for one circumferential length of a medium conveying belt at one end on one surface of a layer of the laminated source material film; winding the laminated source material film with the one electrode pattern formed thereon at least two times around an axial core so that the electrode pattern formed on the one surface of a layer of the laminated source material film forms said electrode pattern on the outermost circumferential surface of the wound laminated source material film, and further winding a resin film at least two times around the wound laminated source material film on a surface of said electrically conductive electrode pattern to form an electrode protective layer; and heat-welding the laminated source material film with said electrically conductive electrode pattern formed thereon and the protective resin layer thereover while they are wound around the axial core to form the medium conveying belt.