Patent ID: 7524044
Filing Date: 2009-04-28
Classification: B41J

Abstract:
1. A liquid ejection apparatus comprising: an apparatus main body; a carriage that is capable of reciprocating relative to the apparatus main body; a liquid ejection head mounted on the carriage; a pump for supplying liquid to the liquid ejection head; a working fluid supply source provided in the apparatus main body, the working fluid supply source having a drive mechanism; a liquid supply source containing liquid; a working fluid supply line connecting the pump to the working fluid supply source, wherein, based on actuation of the drive mechanism, the working fluid is supplied to the pump from the working fluid supply source through the working fluid supply line; and a liquid supply line connecting the pump to the liquid supply source, wherein, based on a change in a pressure of the working fluid, the pump draws liquid from the liquid supply source through the liquid supply line, and supplies the liquid to the liquid ejection head, wherein the working fluid supply source has a fluid chamber communicating with the working fluid supply line, and wherein, as a volume of the fluid chamber changes in response to actuation of the drive mechanism, the working fluid supply source alternately performs pressurization for pressurizing and supplying the working fluid from the fluid chamber to the pump, and depressurization for depressurizing and recovering the working fluid from the pump to the fluid chamber.