Ink jet head with ink usage sensor

Details Ink jet head with ink usage sensor Ink jet head with ink usage sensor

1993-10-26

1997-12-02

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Controller

347 5, 347 88, B41J 2195, B41J 2938

Patent

active

056941560

ABSTRACT:
In the representative embodiments disclosed in the specification, an ink jet system includes a carriage for driving an ink jet head having a reservoir containing ink in a reciprocating motion and a counter for counting ink drops ejected through orifices in the ink jet head, and a nonvolatile memory for storing a number corresponding to the number of drops ejected and for generating a signal to terminate operation of the head or to produce a warning signal or to permit completion of printing of a sheet being printed when the number in the memory reaches a selected value. The ink jet head, which is removable from the system, has a refillable reservoir and, to prevent unauthorized refilling, a security arrangement utilizing a special code or a fuse is provided.

REFERENCES:
patent: 4121222 (1978-10-01), Diebold et al.
patent: 4937598 (1990-06-01), Hine et al.
patent: 5049898 (1991-09-01), Arthur et al.
patent: 5068806 (1991-11-01), Gatten
patent: 5189442 (1993-02-01), Herbert
patent: 5235351 (1993-08-01), Koizumi
patent: 5265315 (1993-11-01), Hoisington et al.

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