Patent ID: 9452613
Filing Date: 2016-09-27
CPC Classification: B41J

Claim Text:
1. An ink supply control method of an inkjet printer that pressurizes an elastic ink pack containing ink with a pressure pump and supplies the ink to an ink path communicating with an inkjet head, the control method comprising: pressurizing the elastic ink pack that drives the pressure pump until the pressure of the pressure pump reaches a predetermined set pressure; stopping the pressure pump after reaching the predetermined set pressure; measuring an elapsed time from a pressurization end time when the pressure pump stops, and determining ink use by the inkjet head since the pressurization end time; calculating the pressure of the pressure pump from the pressurization end time at a specific interval as an estimated pressure based on the elapsed time, and the ink use; and driving the pressure pump when the estimated pressure goes to or below a minimum pressure that is lower than the set pressure.