Incremental printing of symbolic information – Ink jet – Controller
Patent
1998-04-06
2000-08-08
Barlow, John
Incremental printing of symbolic information
Ink jet
Controller
399 24, B41J 2195
Patent
active
060991011
ABSTRACT:
The invention described in the specification relates to an apparatus and method for disabling an ink jet print head cartridge so that the disposable cartridge can not be refilled and used again. The method involves placing a monitoring and disabling device inside of the ink jet print head cartridge. When the print head has exceeded its useful life span, the disabling device disables the print head cartridge. The apparatus consists of a set of electrically charged capacitors, a small processor, ink sensors, and an extra long life miniature battery. A card containing the battery, processor and capacitors is placed in the ink jet print head cartridge. A sensor is placed in the bottom of each ink well of the cartridge. The processor periodically checks the level of ink in each inkwell. Once the processor determines that a specific inkwell has been empty for a certain period of time, the capacitors are discharged to the section of the nozzle plate corresponding to the expended inkwell. The capacitors discharge with a strong enough current and for a long enough time to render the nozzles permanently inactive.
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Maurelli Giuseppe Andre
Nystrom Brant Dennis
Singleton Jason Edward
Barlow John
Hallacher Craig A.
LaRose, Esq. David
Lexmark International Inc.
McArdle, Jr. John J.
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