Elongated ink jet printhead using joined piezoelectric actuator
AssigneeCompag Computer Corporation
InventorDaniel B. Granzow
Life of this patent
Estimating the term…
Abstract
A sidewall actuated channel array for a high density ink jet printhead includes a top wall, bottom wall and a plurality of liquid confining channels formed between columns of polarized piezoelectric material. The array is formed from a plurality of sheets of polarized piezoelectric material which are joined together. Several embodiments are provided for distributing the joints between sheets of piezoelectric material to reduce the magnitude of the electric field needed to polarize the piezoelectric material.
Claims15
A printhead comprising:
- a plurality of sheets of polarized piezoelectric material, said sheets having channels formed therein to receive ink;
- a joiner disposed between said sheets to hold said sheets together, wherein said joiner comprises a non-conductive glue;
- and circuitry coupled to said sheets to actuate selected of said channels to eject ink.
A printhead comprising:
- a plurality of sheets of polarized piezoelectric material, said sheets having channels formed therein to receive ink, wherein said sheets are polarized in a direction which forms a nonperpendicular angle with the direction of the channels;
- a joiner disposed between said sheets to hold said sheets together:
- and
- circuitry coupled to said sheets to actuate selected of said channels to eject ink.
An ink-jet printing system comprising:
- an ink-jet printhead, said ink-jet printhead comprising:
- a plurality of sheets of polarized piezoelectric material, said sheets having channels formed therein to receive ink:
- a joiner disposed between said sheets to hold said sheets together, wherein said joiner comprises a non-conductive glue:
- and
- circuitry coupled to said sheets to actuate selected of said channels to eject ink and thereby cause the ejection of droplets therefrom through orifices associated therewith:
- and
- a manifold for supplying ink thereto:
- a controller for activating said actuating circuitry responsive to an input image signal:
- an external ink conduit communicating with said manifold:
- and
- means for supplying ink to said plurality of ink-carrying channels communicating with said external ink conduit.
An ink-jet printing system comprising:
- an ink-jet printhead, said ink-jet printhead comprising:
- a plurality of sheets of polarized piezoelectric material, said sheets having channels formed therein to receive ink, wherein said sheets are polarized in a direction which forms a nonperpendicular angle with the direction of the channels:
- a joiner disposed between said sheets to hold said sheets together:
- circuitry coupled to said sheets to actuate selected of said channels to eject ink and thereby cause the ejection of droplets therefrom through orifices associated therewith:
- and
- a manifold for supplying ink thereto:
- a controller for activating said actuating circuitry responsive to an input image signal:
- an external ink conduit communicating with said manifold, and
- means for supplying ink to said plurality of ink-carrying channels communicating with said external ink conduit.
Dependencies are inferred from the claim text.