Analog chart recorder employing thermal printing means
AssigneeXerox Corporation
InventorDavid D. Thornburg
Life of this patent
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Abstract
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.
Claims6
An analog chart recorder comprising a heater assembly said assembly comprising a tapered electrically resistive element which develops a non-uniform temperature profile on electrical energization along its length, a substrate which underlies said resistive film which is in thermal contact with said resistive film, a heat sink in thermal contact with said substrate which provides that the temperature distribution will achieve steady state, and means for advancing a heat sensitive media past and in contact with the heater assembly.
A recorder comprising a heater assembly, said assembly comprising a tapered electrically resistive element which develops a non-uniform temperature profile on electrical energization along its length, a substrate which underlies said resistive film which is in thermal contact with said resistive film, a heat sink in thermal contact with said substrate which provides that the temperature distribution will achieve steady state, means for advancing a heat sensitive media past and in contact with the heater assembly, and means for alternatively raising and lowering the substrate between incrementing steps.
Dependencies are inferred from the claim text.