Ultrasonic method for monitoring inkjet cartridge levels

Details Ultrasonic method for monitoring inkjet cartridge levels Ultrasonic method for monitoring inkjet cartridge levels

1995-11-21

1998-06-30

Wong, Peter S.

Incremental printing of symbolic information

Ink jet

Controller

367 99, 7386118, B41J 2195, G01F 23296

Patent

active

057741360

ABSTRACT:
The present invention relates generally to inkjet printing mechanisms, and more particularly to an ultrasonic method for monitoring the ink level in an ink reservoir for an ink jet cartridge. This ultrasonic method includes the steps of sending an ultrasonic signal towards the ink reservoir, and receiving a series of reflected ultrasonic signals from the reservoir. In a processing step, the series of received reflected ultrasonic signals are processed in order to determine the ink level in the reservoir.

REFERENCES:
patent: 4422085 (1983-12-01), Sumitomo et al.
patent: 4479433 (1984-10-01), MacPhee et al.
patent: 4965596 (1990-10-01), Nagoshi et al.
patent: 5036892 (1991-08-01), Stembridge et al.
patent: 5303585 (1994-04-01), Lichte
patent: 5586085 (1996-12-01), Lichte
patent: 5612723 (1997-03-01), Shimura et al.

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