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US 5,844,581 AGranted
Electronic control for consistent ink jet images
AssigneeMoore Business Forms, Inc.
InventorsAnthony B. DeJoseph, Phillip C. Jerzak, Anthony V. Moscato
Life of this patent
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AssigneeMoore Business Forms, Inc.
InventorsAnthony B. DeJoseph, Phillip C. Jerzak, Anthony V. Moscato
Estimating the term…
A method and assembly varies the image density of ink from a plurality of ink jet nozzles to provide substantially uniform ink density. Electronically and automatically the electrical power consumption of an ink jet device having an electrical heater is measured (typically by measuring the current draw), and in response to that measurement, if necessary, pulse or voltage supplied to the heater or heaters of each of the ink jet devices is automatically adjusted. More electrical power is supplied if greater image density is required for a particular ink jet device, and less electrical power if lower image density is desired. During typical operation all pulse widths are reset to default settings, the signal received is calibrated, a pattern generator is signalled to provided test data, the present peak electrical current consumed by each nozzle heater is sampled, and the pulse width for each nozzle heater is set based upon the current sample.
A method of varying the image density of an ink image formed by ink from an ink jet device having an electrical heater, comprising the steps of electronically and automatically:
An ink jet printing assembly comprising:
An ink jet printing assembly comprising:
Dependencies are inferred from the claim text.