Patent ID: 7296882
Filing Date: 2007-11-20
Classification: B41J

Abstract:
1. In an ink jet printer that ejects ink drops from printhead ink nozzles in response to ink nozzle activation signals, a method of adjusting ink drop size, the method comprising: sending to printhead ink nozzles first ink nozzle activation signals; determining a quantity of ink passing a predetermined point in a printer during a specified time period; determining a number of ink drops ejected from the printhead ink nozzles during the specified time period; determining a determined size for each ink drop from the quantity of ink passing the predetermined point in the printer and the number of ink drops ejected during the specified time period; determining if the determined size of each ink drop meets predetermined drop size criteria; and if the determined size of each ink drop does not meet predetermined drop size criteria, sending to the printhead ink nozzles second ink nozzle activation signals, wherein the second ink nozzle activation signals are different from the first ink nozzle activation signals.