Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Reexamination Certificate
2007-10-09
2007-10-09
Shah, Manish S. (Department: 2853)
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
C347S095000, C523S160000
Reexamination Certificate
active
10480801
ABSTRACT:
Disclosed is an ink set for use in an ink jet recording process, wherein at least two aqueous inks A and B having different hues are superimposed to form a color image. The ink set can give a clear color image by high speed printing having good resolution without bleeding in the boundaries between two colors. Disclosed also are a method, an ink cartridge and an apparatus for ink jet recording using the above ink set. The ink set is characterized in that, of the two aqueous inks A and B, one ink A includes a coloring material A having an anionic group and in that the other ink B includes a coloring material B and a quaternary ammonium salt having at least one alkyl group which has 6 or less carbon atoms and which has a hydroxyl group.
REFERENCES:
patent: 5861447 (1999-01-01), Nagasawa et al.
patent: 2001/0033318 (2001-10-01), Koitabashi et al.
patent: 2002/0135650 (2002-09-01), Nagai et al.
patent: 2000-53898 (2000-02-01), None
patent: 2001-115069 (2001-04-01), None
Ricoh & Company, Ltd.
Shah Manish S.
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