Resistive Ribbon Unitary Electrode Head and Cable
Original Publication Date: 1988-Mar-01
Included in the Prior Art Database: 2005-Feb-14
Resistive ribbon printers employ a printhead of electrodes which deliver current to the ribbon. Since these electrodes must withstand both wear and electrical discharge at their tips, they typically are of a refractory metal such as tungsten. The combined electrode head and cable described here employs tungsten tips and copper, which is compliant, for the remainder of the connecting element. The copper part may extend from a conventional moving printhead carrier to the printer control unit as a cable which flexes as required. U.S. Patent 4,390,884 is illustrative generally of the type of printhead described in this article. In this printhead, as shown in the drawing, a bottom layer of heat-resistant polyimide of one-mil thickness carries a one-mil-thick layer of a heat-resistant adhesive.