Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Reexamination Certificate
2005-05-03
2005-05-03
Shah, Manish (Department: 2853)
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
C347S101000, C523S160000
Reexamination Certificate
active
06886931
ABSTRACT:
An ink set that affords high print quality and stable discharge, places a small load on the apparatus, has a plurality of colors of ink jet recording ink, allows a substantially uniform amount of each color of ink to be discharged, and yields a recorded image with virtually no difference in the size of the dots between colors, and a method for manufacturing this ink set, and an ink jet recording apparatus. The ink set for ink jet recording of the present invention includes a plurality of colors of ink containing pigments in which the aspect ratio (σ) between the major and minor axes of the pigment particles is 2 or less, and the value of η(1−n(σ−1)), which is calculated from the ink viscosity (η) as measured at a shear rate of 200 S−1and at 20° C., is within ±5% for said plurality of colors of ink. The method for manufacturing the ink set for ink jet recording of the present invention is such that the value of η(1−n(σ−1)), as measured at a specific shear rate and a specific temperature, is within ±5% for said plurality of colors of ink. The ink jet recording apparatus of the present invention makes use of the above-mentioned ink set for ink jet recording, and employs a head whose drive system is electrostrictive or thermal.
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patent: 5942028 (1999-08-01), Tomiya et al.
patent: 6027559 (2000-02-01), Morii et al.
patent: 6499839 (2002-12-01), Busby et al.
patent: 20040069182 (2004-04-01), Nakajima
patent: 1142965 (2001-10-01), None
patent: 9-272833 (1997-10-01), None
Patent Abstracts of Japan of 9-272833 of Oct. 21, 1997.
Ladas & Parry LLP
Seiko Epson Corporation
Shah Manish
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