Ink-jet printer

Patent metadata

Field	Value
Publication number	US-2016193833-A1
Application number	US-201615072875-A
Country	US
Kind code	A1
Filing date	Mar 17, 2016
Priority date	Sep 26, 2014
Publication date	Jul 7, 2016
Grant date	—

Abstract

There is provided an ink-jet printer including an ink-jet head, a conveyance section, and a controller. The ink-jet head includes a plurality of nozzle groups. Between the plurality of nozzle groups, the nozzles forming the nozzle groups are positioned in conformity with each other, respectively, in a second direction. The controller causes the conveyance section to convey the recording medium between a first pass and a second pass such that the respective nozzle groups have partly overlapped scanning areas, and causes the ink-jet head to print separately between the first pass and the second pass in the second direction. The controller sets usable bordering positions in the overlapping range with respect to the passes. The controller sets the usable bordering positions based on one of such conditions as a duty of printing on the recording medium and a type of the nozzle groups to be used in printing.

First claim

What is claimed is:

1 . An ink-jet printer comprising:
an ink-jet head configured to jet ink onto a recording medium while moving in a first direction; a conveyance section configured to convey the recording medium in a second direction intersecting the first direction, relative to the ink-jet head; and a controller configured to control the ink-jet head and the transport portion, wherein the ink-jet head includes a plurality of nozzle groups each of which includes a plurality of nozzles arrayed along the second direction; wherein between the plurality of nozzle groups, the nozzles forming the nozzle groups are positioned in conformity with each other, respectively, in the second direction; wherein the controller causes the conveyance section to convey the recording medium between a first pass and a second pass of the ink-jet head such that the respective nozzle groups have partly overlapped scanning areas on the recording medium between the first pass and the successive second pass in the first direction, and causes the ink-jet head to print separately between the first pass and the second pass in the second direction in an overlapping range where the scanning areas are overlapped between the first pass and the second pass; wherein the controller sets usable bordering positions in the overlapping range with respect to the passes, each of the usable bordering position defining a bordering position between the nozzles to be used and the nozzles not to be used in one of the nozzle groups; and wherein the controller sets each of the usable bordering positions for the plurality of nozzle groups based on one of such conditions as a duty of printing on the recording medium and a type of the nozzle groups to be used in printing on the recording medium.

Assignees

• Brother Ind Ltd

Inventors

• Matsuura Kazunari

Classifications

• B41J2/145 Primary

  Arrangement thereof · CPC title

• B41J2/2054 Primary

  by the variation of dot disposition or characteristics, e.g. dot number density, dot shape · CPC title

• B41J2/2132

  Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding (methods for local corrections by dot omission, image edge enhancement, or multi-pass mask selection G06K15/102; colour conversion H04N1/40) · CPC title