CRUM chip, image forming device for verifying consumable unit comprising the CRUM chip, and methods thereof
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United States of America Patent
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Jan 9, 2018
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N/A
app pub date -
Jan 25, 2017
filing date -
Oct 18, 2013
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Abstract
Provided herein is an image forming device including a main body; a consumable unit detachable from and attachable to the main body, and including a CRUM chip; a storage which stores a detection list including information on counterfeit CRUM chips and a conversion serial information list including a plurality of conversion serial information each of which is converted from serial information stored in the CRUM chip according to a plurality of different predetermined rules; and a controller to limit use of the consumable unit, when verifying the consumable unit based on at least one of the detection list and the conversion serial information list fails.
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