×

Method of normality decision with regard to ink cartridge and printer actualizing the method

  • US 7,513,590 B2
  • Filed: 08/02/2005
  • Issued: 04/07/2009
  • Est. Priority Date: 11/26/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. A printer, to which an ink cartridge having a storage unit is detachably attached, the printer comprising:

  • a reading unit reading a piece of ink related information indicating a month of manufacture of the ink cartridge, wherein the piece of information has been registered in advance in a predetermined format, from the storage unit; and

    a decision unit identifying whether the read-out piece of ink related information satisfies the predetermined format, so as to determine whether the storage unit is normal or whether the storage unit is not normal if the read-out piece of ink related information has been destroyed,wherein the predetermined format is four-bit data, and the decision unit determines that the storage unit is not normal when the ink-related information has a predetermined value.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×