Patent ID: 7097290
Filing Date: 2006-08-29
Classification: B41J

Abstract:
1. A method for supplying ink from a main tank to sub-tanks in a printing device which executes printing by ejecting ink from nozzles onto a printing medium, the printing device comprising: a plurality of nozzles for ejecting ink drops; a first sub-tank which is provided at a high position relative to a second sub-tank and which holds ink to be supplied to one part of the plurality of the nozzles; the second sub-tank which is provided at a low position relative to the first sub-tank and which holds ink to be supplied to another part of the plurality of the nozzles; and a main tank which is connected to the first and second sub-tanks and holds ink to be supplied to the first and second sub-tanks; the method including: supplying ink from the main tank to the first sub-tank at a first pressure at a common-use ink supplying line used for ink supply to both the first and second sub-tanks; and supplying ink from the main tank to the second sub-tank at a second pressure that is lower than the first pressure at the common-use ink supplying line, wherein the ink is supplied from the main tank to the first sub-tank without going through the second sub-tank, and the ink is supplied from the main tank to the second sub-tank without going through the first sub-tank.