In all inkjet printers the ink cartridges are arranged in a slot array where is required to insert each ink
supply (cartridge containing ink of a certain colour) on the right slot position. Installing an ink cartridge
in the wrong slot may lead to the mixing of different ink colours inside the printer’s ink delivery system
causing a severe service issue which basically consists of purging and cleaning all the internal ink tubes.
The innovation presented in this paper takes advantage of the electrical circuitry to allow the printer to
identify the ink supply and verify that it has been inserted in the right slot with no need of mechanical
features before pumping the ink into the printer.
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INC, HP, "MULTIPLEXING INK SUPPLY SLOT DETECTION", Technical Disclosure Commons, (September 04, 2019)