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Image forming device, consumable used in the image forming device, and method of managing status information of the consumable

  • US 7,330,673 B2
  • Filed: 01/24/2005
  • Issued: 02/12/2008
  • Est. Priority Date: 01/24/2004
  • Status: Active Grant
First Claim
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1. A method of managing a status of a consumable in an image forming device for transferring an electrostatic image formed on a surface of a photosensitive medium onto paper, the method comprising the steps of:

  • reading consumable information including remaining lifetime information from a consumable memory in the consumable;

    reading management information related to the status of more than one consumable in the image forming device from a management memory in the image forming device;

    calculating an amount of consumables used during an operation of the image forming device;

    updating the consumable information and the management information based on the calculated amount of consumable used; and

    restoring the management information using the consumable information read from the consumable memory when the management information stored in the management memory is erased erroneously.

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