Detecting theft of print substance from a printing device

Details Detecting theft of print substance from a printing device Detecting theft of print substance from a printing device

2006-01-03

2006-01-03

Lamb, Twyler (Department: 2622)

Facsimile and static presentation processing

Static presentation processing

Plotter

C358S001100, C358S003200

Reexamination Certificate

active

06982810

ABSTRACT:
An amount of print substance in a printing device as well as an amount of print substance that should be in the printing device are identified. A difference between these amounts is determined and the difference compared to a threshold value. A determination that print substance has been removed from the printing device is made if the difference exceeds the threshold amount.

REFERENCES:
patent: 6456802 (2002-09-01), Phillips
patent: 6459863 (2002-10-01), Kawabe
patent: 6672695 (2004-01-01), Naka et al.

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