Method of reducing cross talk in ink jet arrays

Claim 1

A method of operating an array of pulsed droplet ejectors which comprises: (a) determining the velocity of ink droplets ejected from a first selected ejector in the ejector array when said first ejector is operated alone at a first preset drive pulse width; (b) determining the velocity of ink droplets ejected from said first selected ejector when at least one adjacent ejector is operated at the same time as said first ejector, said ejectors being driven by a drive pulse of the same width as said first preset drive pulse width; (c) determining the difference in droplet velocities obtained from steps (a) and (b); (d) selecting a drive pulse having a different pulse width than previously used in steps (a)-(c) and repeating steps (a)-(c) using said different pulse width; (e) repeating steps (a)-(d) a sufficient number of times until a drive pulse width can be selected that provides acceptable image quality both when said first ejector is operated alone and when said first ejector is operated at the same time as adjacent ejectors; and (f) operating an ejector array using a drive pulse having the drive pulse width selected in step (e).

Claim 2

A method of operating an array of pulsed droplet ejectors which comprises: (a) determining the velocity of ink droplets ejected from a first selected ejector in the ejector array when said first ejector is operated alone at a first preset drive pulse width; (b) determining the velocity of ink droplets ejected from said first selected ejector when at least one adjacent ejector is operated at the same time as said first ejector, said ejectors being driven by a drive pulse of the same width as said first preset drive pulse width; (c) determining the difference in droplet velocities obtained from steps (a) and (b); (d) selecting a drive pulse having a different pulse width than previously used in steps (a)-(c) and repeating steps (a)-(c) using said different pulse width; (e) repeating steps (a)-(d) a sufficient number of times until a drive pulse width can be selected that provides acceptable image quality both when said first ejector is operated alone and when said first ejector is operated at the same time as adjacent ejectors; and (f) operating an ejector array using a drive pulse having the drive pulse width selected in step (e).

Claim 3

A method of optimizing ejection from an array of pulsed droplet ejectors which comprises: (a) determining the velocity of ink droplets ejected from a first selected ejector in the ejector array when said first ejector is operated alone at a first preset drive pulse width; (b) determining the velocity of ink droplets ejected from said first selected ejector when at least one adjacent ejector is operated at the same time as said first ejector, said ejectors being driven by a drive pulse of the same width as said first preset drive pulse width; (c) determining the difference in droplet velocities obtained from steps (a) and (b); (d) selecting a drive pulse having a different pulse width than previously used in steps (a)-(c) and repeating steps (a)-(c) using said different pulse width; and (e) repeating steps (a)-(d) a sufficient number of times until an optimum drive pulse width can be determined.

Claim 4

A method of optimizing ejection from an array of pulsed droplet ejectors which comprises: (a) determining the velocity of ink droplets ejected from a first selected ejector in the ejector array when said first ejector is operated alone at a first preset drive pulse width; (b) determining the velocity of ink droplets ejected from said first selected ejector when at least one adjacent ejector is operated at the same time as said first ejector, said ejectors being driven by a drive pulse of the same width as said first preset drive pulse width; (c) determining the difference in droplet velocities obtained from steps (a) and (b); (d) selecting a drive pulse having a different pulse width than previously used in steps (a)-(c) and repeating steps (a)-(c) using said different pulse width; and (e) repeating steps (a)-(d) a sufficient number of times until an optimum drive pulse width can be determined.