Flexible Thermal Printhead
Original Publication Date: 1984-Jan-01
Included in the Prior Art Database: 2005-Feb-02
The drawing shows a view from the front of a printhead having separate units of polyimide under metal electrodes held by adhesive. Each polyimide unit is about the size of each of the electrode. The separate polyimide units provide a significantly more flexible printhead compared to a printhead in which the corresponding polyimide is continuous. The printhead is one in which the open ends of metal electrodes (shown in the drawing) contact a resistive ribbon to selectably apply current to the ribbon. Thermoplastic ink on the opposite side of the ribbon is rendered flowable by the heat generated in the resistive substrate of the ribbon and forms characters on paper or the like. The system shown in U. S. Patent 4,345,845 is illustrative.