Resistive Ribbon Print Head Profile
Original Publication Date: 1985-Feb-01
Included in the Prior Art Database: 2005-Feb-18
Build-up of debris on the electrodes of a thermal print head used with a resistive ribbon for printing is prevented through relieving the pressure on the portions of the ribbon extending beyond the electrode functional area. This produces a substantially uniform pressure in the electrode functional area so that arcing does not occur to generate the debris. A resistive ribbon 1 (Fig. 1) is fed between a platen 2 and a thermal print head 3 through being pulled in the direction of an arrow 4. A sheet of paper (not shown) is positioned on the platen 2 for printing thereon when electrodes 5 (Fig. 2) of the print head 3 engage the resistive ribbon 1 to transfer ink from the ribbon 1 to the sheet of paper. Thus, the electrodes 5 form an electrode functional area 7.