Patent ID: 8585192
Filing Date: 2013-11-19
Classification: B41J

Abstract:
1. An ink cartridge adapted to be detachably attached to an ink jet recording apparatus, the ink cartridge comprising: an ink storing chamber; an atmosphere communicating connection port communicated with the ink storing chamber and located in a lateral side of the ink cartridge, the atmosphere communicating connection port adapted to communicate the ink storing chamber with atmosphere and extending in a horizontal direction when the ink cartridge is attached to the ink jet recording apparatus, and having a first valve member movable in an axial direction of the atmosphere communicating connection port and configured to close automatically when the ink cartridge is detached from the ink jet recording apparatus; a communication chamber communicated with the atmosphere communicating connection port; an ink supplying connection port communicated with the ink storing chamber and located in the lateral side of the ink cartridge and below the atmosphere communicating connection port, the ink supplying connection port extending in the horizontal direction when the ink cartridge is attached to the ink jet recording apparatus, and having a second valve member movable in an axial direction of the ink supplying connection port and configured to close automatically when the ink cartridge is detached from the ink jet recording apparatus; a first spring biasing the first valve member so that the first valve member closes the atmosphere communicating connection port when the ink cartridge is detached from the ink jet recording apparatus, and opens the atmosphere communicating connection port when the ink cartridge is attached to the ink jet recording apparatus; and a second spring biasing the second valve member so that the second valve member closes the ink supplying connection port when the ink cartridge is detached from the ink jet recording apparatus, and opens the ink supplying connection port when the ink cartridge is attached to the ink jet recording apparatus, wherein the atmosphere communicating connection port and the ink supplying connection port are configured to be opened when the ink cartridge is attached to the ink jet recording apparatus being in a state to perform recording operations.