Ink drop detector configurations

Details Ink drop detector configurations Ink drop detector configurations

2005-08-30

2005-08-30

Pham, Hai (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

C347S081000, C347S078000

Reexamination Certificate

active

06935717

ABSTRACT:
A sensor configuration for use in detecting ink droplets ejected from an ink drop generator is provided. The sensor configuration includes a sensing element configured to receive a biasing voltage which creates an electric field from the sensing element to the ink drop generator. The sensor configuration also includes a sensing amplifier coupled to the sensing element, whereby the sensing element in imparted with an electrical stimulus when at least one ink droplet is ejected in the presence of the electric field, and thereafter passes in close proximity to the sensing element without substantially contacting the sensing element. Sensor configurations with a separate electrically biasing element which may or may not contact the ink droplets are also provided. Additionally, a printing mechanism having such sensor configurations and a method of making ink drop detection measurements are also provided.

REFERENCES:
patent: 4484199 (1984-11-01), Watanabe
patent: 5160939 (1992-11-01), Bajeux et al.
patent: 6086190 (2000-07-01), Schantz et al.
patent: 6769756 (2004-08-01), Su et al.

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