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EP0706889A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Ink jet recording apparatus and method

Assignee: Canon Inc
•
Filing: 1991-11-28
•
Granted: —
•
Expires: 2011-11-28
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Abstract

Abstract An ink jet recording apparatus and method for forming an image including a text region and a halftone region. The text region contains at least a part of a character and/or a thin line thinner than a predetermined thickness, and the halftone region contains a dot image on a recording medium. An image is formed by ejecting ink from recording heads (51-54) in response to an input signal. The apparatus or method identifies the text region and the halftone region of an image on the basis of the input signal, expels black ink onto a recording area on the recording medium (58) so as to form at least a part of the text region in a first scanning of the recording heads, expels a plurality of inks (Y, M, C, K) including the black ink (K) onto the recording area so as to form at least a part of the text and the halftone regions in a second scanning, and repeating the first scanning and the second scanning on the next recording area after incrementing the recording medium.

Inventors

  • 👤 Hiromitsu Hirabayashi
  • 👤 Hiroshi Tajika
  • 👤 Noribumi Koitabashi
  • 👤 Miyuki Mataubara

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-01 15:02
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/205; B41J2/2056; B41J11/00; B41J11/009; B41J11/0095; B41J2/21; B41J2/2132; G; G06; G06K; G06K15/00; G06K15/02; G06K15/10; G06K15/102; G06K15/18; G06K15/1867; G06K15/1869; G06K15/1871; H; H04; H04N; H04N1/00; H04N1/40; H04N1/40062; H04N1/46; H04N1/56; H04N1/60; H04N1/6016; H04N1/6022; B41J2/2052; G06K2215/00; G06K2215/0082; G06K2215/0094

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 78 words
An ink jet recording apparatus for performing recording on a recording medium by depositing ink onto the recording medium in response to a recording data signal, said apparatus comprising: a plurality of recording heads (51-54) for ejecting inks; record control means for controlling recording to a text region consisting of characters and lines by using a recording head which ejects black ink; and a thickness control means for performing recording to said text region with increased recording thickness.
Claim 2
Dependent Claim 29 words
Apparatus as claimed in claim 1, further comprising input means for generating a signal indicative of the type of the recording medium on which recording is being carried out.
Claim 3
Dependent Claim 57 words
Apparatus as claimed in claim 2, wherein said record control means performs, when the type of recording medium indicated by said signal is of low ink absorption, recording to said text region by using only said recording head which ejects the black ink, with the recording thickness in said text region increased by said thickness control means.
Claim 4
Dependent Claim 34 words
The ink jet recording apparatus as claimed in claim 1, wherein said thickness control means performs a plurality times of recordings onto said recording medium by using a recording head which ejects black ink.
Claim 5
Dependent Claim 67 words
An ink jet recording method for forming an image on a recording medium by using a plurality of recording heads (51-54) for ejecting inks, said method comprising the step of: recording to a first region with thicker ink density than to a second region, said first region being recorded by a recording head which ejects black ink, and said second region being recorded by other recording heads.
Claim 6
Dependent Claim 37 words
A method as claimed in claim 5, wherein said step of recording performs recording with a larger number of times of recordings to said first region than the number of times of recordings to said second region.

References Cited (Backward Citations)

US4087825A Cited
US4723129A Cited
US4740796A Cited
JPS5456847A Cited
US4459600A Cited
US4345262A Cited
US4463359A Cited
US4313124A Cited
US4558333A Cited
JPS59123670A Cited
JPS59138461A Cited
JPS59146262A Cited
US4617580A Cited
US4721968A Cited
JPS6071260A Cited
EP0286414A2 Cited
EP0300743A2 Cited

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