Method and apparatus for measuring the temperature of drops ejec

Details Method and apparatus for measuring the temperature of drops ejec Method and apparatus for measuring the temperature of drops ejec

1994-12-20

1997-07-01

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Controller

B41J 2938

Patent

active

056443439

ABSTRACT:
The volume of ink drops ejected from ink jet printers is temperature dependent because physical properties of the ink, such as surface tension and viscosity, depend on the ink temperature. The volume of the ejected ink drop strongly influences the size of the printed spot and this size effects the quality of the recorded text and graphics. The temperature of the ejected drop depends on the temperature of the drop ejection mechanism. The present invention measures the temperature of the ejected drops with a temperature sensor placed within the trajectory of the drops. The printhead carriage mechanism aligns the drop ejector and the temperature sensor. Then, the drop ejector ejects multiple drops onto the temperature sensor. The temperature sensor may reside in an ink drop collection chamber having a capillary device for wicking ink away from the temperature sensor to a waste ink accumulator.

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