Flexible Electrode Printhead With Heat Sink
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-02
Printheads used for resistive ribbon printing, such as described in U.S. Patent 4,350,449, generate high temperatures near the print electrode tips. As the desired heat is produced in the resistive ribbon, high temperatures in the printhead are not required. The high temperatures tend to burn and degrade most materials which might be used in the printhead. Rigid materials are generally unsuitable because it is desirable that the printhead be flexible to permit the electrodes to closely follow the resistive ribbon. In the printhead shown in the drawing, cooling is achieved employing a vacuum-deposited lamination of metal as a heat sink. The drawing shows a cross-sectional view from the side of a printhead showing one electrode 1. A typical printhead has forty such electrodes positioned in a column.