The ink cartridge includes an ink supply port formed at a position, offset to one side, of a wall configuring an ink container body; a positioning projecting portion, formed on one wall out of two opposing walls adjacent the wall, whose upper surface and side portion are regulated in position when the...http://www.google.com.hk/patents/US7802877?utm_source=gb-gplus-share專利 US7802877 - Ink cartridge and recording apparatus
