US 11,969,990 B2
Ink discharging apparatus, ink heating method, and water-based ink for recording
Yuki Okumura, Iwakura (JP)
Assigned to BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed on Dec. 7, 2021, as Appl. No. 17/543,950.
Application 17/543,950 is a continuation of application No. PCT/JP2020/023177, filed on Jun. 12, 2020.
Claims priority of application No. 2019-128275 (JP), filed on Jul. 10, 2019.
Prior Publication US 2022/0088944 A1, Mar. 24, 2022
Int. Cl. B41J 11/00 (2006.01); B41M 5/00 (2006.01); C09D 11/023 (2014.01); C09D 11/033 (2014.01); C09D 11/037 (2014.01); C09D 11/107 (2014.01); C09D 11/326 (2014.01)
CPC B41J 11/00216 (2021.01) [B41M 5/0023 (2013.01); C09D 11/023 (2013.01); C09D 11/033 (2013.01); C09D 11/037 (2013.01); C09D 11/107 (2013.01); C09D 11/326 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An ink discharging apparatus comprising:
a conveyor configured to convey a recording medium in a conveying direction;
a head configured to discharge the water-based ink for recording onto the recording medium conveyed by the conveyor; and
a heater which is located at downstream in the conveying direction of the head, and is configured to heat the recording medium or the water-based ink for recording adhered to the recording medium,
wherein the water-based ink for recording includes:
a resin-dispersed pigment,
resin fine particles of which glass transition temperature is not less than 33° C.
water, and
an organic solvent including a specific organic solvent of which saturation vapor pressure at 20° C. is not less than 0.03 hPa, and
the ink discharging apparatus satisfies the following condition (I):

OG Complex Work Unit Math
in the condition (I),
α (° C.) being the glass transition temperature of the resin fine particles, and
β (J/cm2) being an irradiation energy, radiated from the heater, per unit area of the recording medium, and being expressed by multiplying an electric power density (W/m2) of the heater with an irradiation time of the heater.