Patent ID: 8419175

Claim:
A printing system comprising: a filter including: an electroformed metal structure including: a plurality of first recesses, each of the plurality of first recesses having a first recess diameter, the plurality of first recesses having a first recess center-to-center spacing relative to each other; a plurality of second recesses, each of the plurality of second recesses having a second recess diameter, the plurality of second recesses having a second recess center-to-center spacing relative to each other; a plurality of first pores, each of the plurality of first pores being in fluid communication with a corresponding one of the plurality of first recesses; and a plurality of second pores, each of the plurality of second pores being in fluid communication with a corresponding one of the plurality of second recesses, wherein the first recess diameter is not equal to the second recess diameter, and the first recess center-to-center spacing is not equal to the second recess center-to-center spacing; a printhead including a plurality of nozzles through which liquid is emitted; and a liquid supply system in liquid communication with the printhead through the filter.