Patent ID: 8109617
Filing Date: 2012-02-07
Classification: B41J

Abstract:
1. An ink tank detachably mountable to an ink jet printing apparatus, wherein the ink jet printing apparatus includes a holder having a holder-side contact and a light receiver element positioned to receive light and discriminates whether the ink tank is mounted at a proper position in the holder on the basis of a light reception result of the light receiver element, the ink tank comprising: a light source which emits the light; an electric contact electrically connectable to the holder-side contact in a state that the ink tank is mounted to the holder; a controller which controls the light source to emit the light based on an electrical signal supplied from the holder-side contact through the electrical contact; a light guiding section which has a light incident portion in which the light emitted from the light source controlled by the controller enters and a light exit portion, and which guides the light entered from the light incident portion to the light exit portion; and a light shielding member positioned at a periphery of the light exit portion to shield a part of the light exited from the light exit portion toward the light receiver element.