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Title:
IMAGE FORMING METHOD AND IMAGE FORMING APPARATUS
Document Type and Number:
Japanese Patent JP2011073403
Kind Code:
A
Abstract:

To provide an image forming method and an image forming apparatus which can suppress occurrence of bleeding even when a treating liquid is not applied.

The image forming method includes: a step for forming an ink image on an intermediate transfer body by discharging a conductive ink in which a pigment is dispersed in a water with an anionic dispersant from nozzles of a recording head; and a step for transferring the ink image formed on the intermediate transfer body to a recording medium, wherein the conductive ink contains a resin having an anionic group, and the intermediate transfer body has a conductive surface. In a state that voltage is applied between the conductive ink and the conductive surface, a bridge of a liquid column comprising the conductive ink is temporarily formed between the nozzle and the intermediate transfer body, and the pigment is aggregated by producing a proton by oxidizing a water contained in the bridge of the liquid column near the conductive surface to form the ink image on the intermediate transfer body.


Inventors:
HASEGAWA YOSHINO
USUI YUMA
TSUKAMOTO TAKEO
SEO MANABU
ORITO TAKESHI
SUZUKI RYOTA
Application Number:
JP2009229845A
Publication Date:
April 14, 2011
Filing Date:
October 01, 2009
Export Citation:
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Assignee:
RICOH CO LTD
International Classes:
B41M5/00; B41J2/01; C09D11/00; C09D11/52
Domestic Patent References:
JPH0286453A1990-03-27
JPH0243053A1990-02-13
JPH11207946A1999-08-03
JPS5941279A1984-03-07
JP2000117987A2000-04-25
JP2006082461A2006-03-30
JP2007331171A2007-12-27
JP2008230062A2008-10-02
JP2008037642A2008-02-21
Attorney, Agent or Firm:
Tadahiko Ito