Patent ID: 7810893

Claim:
An apparatus for regulating viscosity of ink, which is installed on a flow path of ink in a printing device, the apparatus comprising: a housing installed on the flow path, having an introduction hole and a discharge hole, through which ink is respectively introduced and discharged; a rotary shaft installed in the housing, to which at least one rotating fan is coupled to rotate along with flow of the ink; a sensed member having a sensed body at one end thereof, coupled to the rotary shaft to rotate together with the rotary shaft; a sensor to sense the sensed body; a receptacle to receive the rotary shaft so as to be rotatable and detachably coupled in the housing, the receptacle having an inlet communicating with the introduction hole of the housing, and an outlet communicating with the discharge hole of the housing; and an ink flow rate changing means to change the flow rate of the ink, depending on the viscosity of the ink introduced into the receptacle, comprising: a first disk member coupled to the outlet of the receptacle, in which a plurality of ink passing holes are formed in a first groove formed on the first disk member in a circular shape, for the ink to pass through; and a second disk member spaced apart from the first disk member by an ink flow gap, in which a plurality of ink discharge holes are formed in a second groove formed on the second disk member, along a concentric circle having a different diameter from the first groove, to discharge the ink flowing through the ink passing holes.