Continuous ink jet printing apparatus and method including self-

Details Continuous ink jet printing apparatus and method including self- Continuous ink jet printing apparatus and method including self-

1997-03-28

1999-12-21

Le, N.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 19, B41J 29393, B41J 212

Patent

active

060039809

ABSTRACT:
A method and apparatus for sensing improper operation of an ink jet printer having a plurality of nozzles each emitting, towards a substrate, a series of ink drops broken-off from a continuous ink jet filament, and selectively charging and deflecting said drops according to a pattern of marks to be printed by a respective nozzle on the substrate by: controlling the plurality of nozzles to print test marks on a test strip including a plurality of marks for each nozzle produced by a series of drops from the nozzle while at different charge levels: sensing the test marks for each nozzle; analyzing the test marks for all the nozzles for proper operation of the ink jet printer; and producing an output signal indicating errors in the operation of the printer.

REFERENCES:
patent: 4542385 (1985-09-01), Jinnai et al.
patent: 4590483 (1986-05-01), Regnault et al.
patent: 4907013 (1990-03-01), Hubbard et al.
patent: 5189521 (1993-02-01), Ohtsubo et al.
patent: 5408255 (1995-04-01), Emerson
patent: 5502474 (1996-03-01), Katerberg et al.

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