Patent ID: 7780259
Filing Date: 2010-08-24
Classification: B41J

Abstract:
1. A set of ink cartridges comprising a first-type ink cartridge and a second-type ink cartridge, each of the first-type ink cartridge and the second-type ink cartridge being detachably installable in an image formation apparatus and comprising: a case that reserves ink therein; a first detection target portion on the case, wherein an ink level in the case can be optically detected by a detection device of the image formation apparatus; and a second detection target portion on the case, wherein a type of the ink cartridge can be optically identified by the detection device of the image formation apparatus, wherein a reflective member is disposed on the second detection target portion of the first-type ink cartridge, wherein no reflective member is disposed on the second detection target portion of the second-type ink cartridge, and wherein the first and second detection target portions are configured so that the ink level and the type of ink cartridge can be detected by a single detector.