Incremental printing of symbolic information – Ink jet – Controller
Patent
1996-07-24
1999-07-27
Le, N.
Incremental printing of symbolic information
Ink jet
Controller
B41J 29393
Patent
active
059298758
ABSTRACT:
A monitoring system monitors a pressure wave developed in the surrounding ambient environment during inkjet droplet formation. The monitoring system uses either acoustic, ultrasonic, or other pressure wave monitoring mechanisms, such as a laser vibrometer, an ultrasonic transducer, or an accelerometer sensor, for instance, a microphone to detect droplet formation. One sensor is incorporated in the printhead itself, while others may be located externally. The monitoring system generates information used to determine current levels of printhead performance, to which the printer may respond by adjusting print modes, servicing the printhead, adjusting droplet formation, or by providing an early warning before an inkjet cartridge is completely empty. During printhead manufacturing, an array of such sensors may be used in quality assurance to determine printhead performance. An inkjet printing mechanism is also equipped for using this monitoring system and a monitoring method is also provided.
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Axten Bruce A.
Benjamin Trudy L.
Chen Iue-Shuenn
Dangelo Michael T.
Elgee Steven B.
Anderson L.
Hewlett--Packard Company
Le N.
Martin Flory L.
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