This disclosure relates to the field of Printers with internal ink tanks, compared to the
traditional inkjet printers which provide ink suppliers with cartridges, bringing value to
customers with lower printing cost and lesser intervention for ink supply replacement. A
printer ink tank system allows users to top up ink from ink bottles into the tanks based on
ink level statuses in the tanks.
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INC, HP, "ERROR PROOFING DESIGN FOR PRINTER INTERNAL TANK ACCESS", Technical Disclosure Commons, (March 22, 2021)