Patent ID: 7828408
Filing Date: 2010-11-09
Classification: B41J

Abstract:
1. A liquid ejection apparatus comprising: a liquid ejection head having a nozzle through which a liquid is ejected; a maintenance portion that maintains the liquid ejection head; a pressure source that applies pressure to the maintenance portion; and a valve unit that controls the pressure applied from the pressure source to the maintenance portion, wherein the valve unit includes: wherein the valve body has a first passage valve that closes the first passage when the valve body moves in the first direction, and a second passage valve that closes the second passage when the valve body moves in the second direction, the first passage valve and the second passage valve being provided at opposite sides of the valve body and associated commonly with the valve body; and wherein the first passage valve is capable of selectively opening and closing a pressure line defining a portion of a passage extending between the maintenance portion and the pressure source, and the second passage valve is capable of selectively opening and closing an atmospheric air passage that exposes the maintenance portion to the atmospheric air.