Patent ID: 8567934

Claim:
A printhead comprising: a fluid inlet; and a jetstack configured to include a multi-plane filter laminate, the multi-plane filter laminate comprising: a first rock screen subassembly comprising a first downstream pocket layer and a first rock screen plate disposed between the fluid inlet and the first downstream pocket layer, wherein the first rock screen plate comprises a first plurality of through holes; and a second rock screen subassembly bonded to the first rock screen subassembly comprising a second upstream pocket layer, a second downstream pocket layer aligned with the second upstream pocket layer, and a second rock screen plate sandwiched between the second upstream and second downstream pocket layers, wherein the second rock screen plate comprises a second plurality of holes, a portion of the first rock screen plate of the first subassembly, overlaying the second rock screen plate of the second subassembly, wherein the first rock screen subassembly does not comprise a first upstream Docket layer.