Water base ink set for ink-jet recording

Details Water base ink set for ink-jet recording Water base ink set for ink-jet recording

2007-05-15

2007-05-15

Shah, Manish S. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

C347S095000, C523S160000

Reexamination Certificate

active

10744553

ABSTRACT:
A water base ink set for ink-jet recording includes a water base ink which contains an acid dye, and a water base ink which contains a basic dye. The water base ink contains a polymer which has an average molecular weight of 3,000 to 20,000 and which is represented by the following formula (1):wherein X represents H or COONa, and Y represents H, COONa, SO3Na, or CH2OR in the formula (1). R represents a substituted group having SO3Na with carbon atom or atoms of a number of 1 to 5. When the ink containing the acid dye and the ink containing the basic dye are mixed with each other, then the head discharge section is prevented from any clog-up, and it is possible to perform the stable jetting operation.

REFERENCES:
patent: 4500693 (1985-02-01), Takehara et al.
patent: 2004/0168608 (2004-09-01), Bauer et al.
patent: 7-314880 (1999-12-01), None

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