Incremental printing of symbolic information – Ink jet – Controller
Reexamination Certificate
2006-01-03
2006-01-03
Gray, David (Department: 2853)
Incremental printing of symbolic information
Ink jet
Controller
C347S088000
Reexamination Certificate
active
06981754
ABSTRACT:
A method and system is provided for more accurately determining ink in-flow and out-flow to a reservoir in a solid-to-liquid ink phasing delivery system for supplying ink to a printer. The printer throughput is safely maximized with a software algorithm that measures the ink available in the printer reservoir for printing. The algorithm is based on the known amount of ink in the reservoir when a level sensor probe is tripped and then calculates additional changes in ink volume. The process is done until the algorithm determines the reservoir volume is below a predetermined minimum level when the level sense probe senses ink. The algorithm calculates the ink leaving the reservoir using an out-flow model based on pixel counting and calculates ink entering the reservoir using an in-flow model based on a minimum guaranteed amount of ink delivered from the melt heater. A time out period is further calculated in which the reservoir should be refilled, and if not, the system is checked for an ink stick jam.
REFERENCES:
patent: 5386224 (1995-01-01), Deur et al.
patent: 6447084 (2002-09-01), Uetsuki et al.
Godil Amin M.
Hindman Larry E.
Thornton Amy B.
Fay Sharpe Fagan Minnich & McKee LLP
Gray David
Martin Laura E.
Xerox Corporation
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