Patent ID: 7293866
Filing Date: 2007-11-13
Classification: B41J

Abstract:
1. An ink cartridge for an ink jet recording device having a recording head, the ink cartridge comprising; a container including: a lower section ink chamber; an upper section ink chamber; an ink supply port for supplying ink to the recording head; an ink suction passage fluidly connecting the lower section ink chamber to the upper section ink chamber, the lower section ink chamber being located upstream of the upper section ink chamber with respect to a direction of ink flow through the ink suction passage; an ink flow passage fluidly connecting the upper section ink chamber to the ink supply port; an air communication passage in fluid communication with the lower section ink chamber and the ambient atmosphere; and, a negative pressure generating mechanism disposed in the container, and disposed within the ink flow passage, wherein the lower section ink chamber is located substantially beneath the upper section ink chamber when the ink cartridge is oriented in a same manner as when the ink cartridge is mounted on the ink jet recording device.