Analog chart recorder employing thermal printing means

摘要

An analog chart recorder is provided having a heater assembly which includes a tapered, electrically resistive element that develops a non- uniform temperature profile on electrical energization along its length. A substrate is provided under the resistive film which is in thermal contact with the film. A heat sink in thermal contact with the substrate provides that the temperature distribution will achieve steady state. Means are provided for advancing a heat sensitive medium past and in contact with the heater assembly thus providing the analog chart recorder.