INK-JET PRINTER

WIPO Patent Application WO/2001/042016

A1

An ink-jet printer for printing an image of high quality even in a printing mode where major line feed and minor line feed are combined, comprising a head which has B ink-jet nozzles (B is an integer) for jetting the same ink arranged in the vertical scanning direction at substantially regular intervals and is movable in the horizontal scanning direction perpendicular to the vertical scanning direction, and a vertical scanning mechanism for moving a recording medium in the vertical scanning direction relatively to the ink head, wherein the nozzle intervals are A times the dot pitch (d) (A is an integer), the printing is performed by repeating a step which includes one print scanning (horizontal scanning) in the horizontal scanning direction, a minor line feed printing and a major line feed for moving the recording medium by a distance (B$m(x)A-(A$m(x)n+1)(C$m(x)A-1))$m(x)d, the minor line feed printing is repeating a sub-step (C$m(x)A-1) times (C is an integer), and the sub-step comprises a minor line feed for moving the recording medium in the vertical scanning direction relatively to the ink head by a distance ((A$m(x)n+1)$m(x)d) which is the sum of n times (n is an integer) the nozzle interval and one dot pitch, and one print scanning in the horizontal scanning direction.

MORIKAWA YUKIO (JP)
MOROO JUN (JP)

PCT/JP1999/006822

June 14, 2001

December 06, 1999

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FUJITSU LTD (JP)
MORIKAWA YUKIO (JP)
MOROO JUN (JP)

B41J2/15; B41J2/505; B41J11/42; G06K15/10; (IPC1-7): B41J2/01; B41J2/51

JPH04361053A	1992-12-14
JPH04358859A	1992-12-11
JP2000025272A	2000-01-25
JPH0752465A	1995-02-28
JPH10181027A	1998-07-07

Ishida, Takashi (Ishida & Associates Toranomon 37 Mori Building 5-1, Toranomon 3-chome Minato-ku Tokyo, JP)

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