Printer

Details Printer Printer

1997-10-10

2000-10-31

Grimley, Arthur T.

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

B41J 217

Patent

active

061391344

ABSTRACT:
The present invention provides a printer which enables to prevent dispersion of a quantitative medium in a discharge medium during a wait period of time, so as to realize an accurate quantification of the quantitative medium to be mixed with the discharge medium, which enables an accurate gradation expression.
The printer includes a printing head having quantitative nozzle communicating with a quantitative medium pressure chamber into which a quantitative medium is introduced and a discharge medium nozzle communicating with a discharge medium pressure chamber into which a discharge medium is introduced. The quantitative medium is made to seep out from the quantitative medium nozzle toward the discharge medium nozzle and after this, the discharge medium is discharged from the discharge medium nozzle to be mixed with the quantitative medium so that the mixture obtained is discharged. The quantitative medium nozzle have an opening of, for example, a crescent shape, i.e., a circular shape with a cut-off portion, and is positioned in such a manner that the nearest point on the opening end of the quantitative medium nozzle from the center of figure of the quantitative medium nozzle faces the discharge medium nozzle which opens adjacently.

REFERENCES:
patent: 5777636 (1998-07-01), Naganuma et al.
patent: 5825379 (1998-10-01), Kagami
patent: 5958122 (1999-09-01), Fukuda et al.

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