Patent ID: 8851617

Claim:
A method to control a flow-rate of printing fluid in a printing fluid delivery system including a second region to receive the printing fluid from a first region and to provide the printing fluid to a printhead to print a plurality of swaths, the method comprising: identifying a sufficient amount of printing fluid for the printhead to print a current swath; and determining whether the sufficient amount of printing fluid is equal to or greater than a volume threshold value based on at least a second printing fluid volume capacity of the second region, and if so: identifying an additional amount of printing fluid to be supplied to the second region; determining an amount of time to provide the additional amount of printing fluid to the second region after printing a previous swath and prior to completion of printing the current swath based on at least a refill rate of the second region; and providing the amount of time after printing the previous swath and prior to the completion of printing the current swath for the second region to be supplied with the additional amount of printing fluid from the first region.