Patent ID: 8888256

Claim:
A system for printing comprising: a drop ejector including: a nozzle; a source of pressurized liquid provided continuously to the nozzle at a pressure sufficient to eject a continuous liquid jet through the nozzle; a drop formation device associated with the liquid jet; a drop formation waveform source which provides print drop formation waveforms having a fundamental period and non-print drop formation waveforms to the drop formation device in response to input print data to form print drops and non-print drops from the liquid jet, the print drops and the non-print drops traveling along an initial path; a transport that provides relative motion between a receiver and the drop ejector at a first speed and provides relative motion between the receiver and the drop ejector at a second speed; a drop charging device including: a charging electrode associated with the liquid jet; a drop charging waveform source which provides a first charging waveform having a period to the charging electrode when the relative motion of the receiver and the drop ejector is at the first speed and provides a second charging waveform having a period to the charging electrode when the relative motion of the receiver and the drop ejector is at the second speed, the first charging waveform being independent of the input print data, the second charging waveform being independent of the input print data, the first charging waveform including a first voltage state and a second voltage state, the second charging waveform including a first voltage state and a second voltage state, the period of the first charging waveform and the period of the second charging waveform being different from each other by one or more fundamental periods of the drop forming waveform; a synchronization device that synchronizes the drop formation device and the drop charging device to produce a print drop charge state on the print drops and produce a non-print drop charge state on non-print drops, the print drop charge state and the non-print drop charge state being distinct when compared to each other; a deflection device associated with the print drops and the non-print drops traveling along the initial path that causes the print drops having the print drop charge state to travel along a print drop path and causes the non-print drops having the non-print drop charge states to travel along a non-print drop path; and a catcher positioned to collect the non-print drops traveling along the non-print drop path while allowing the print drops traveling along the print drop path to continue traveling toward the receiver.