Ink jet head recording apparatus
AssigneeToshiba Tec Kabushiki Kaisha
InventorMasashi SEKI
Life of this patent
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Abstract
An ink jet head recording apparatus comprises an ink jet head that includes a nozzle plate having a plurality of nozzles, a plurality of pressure chambers on an interior side of the nozzle plate and in fluid communication with the plurality of nozzles, an ink supply passage and an ink return passage by which ink is circulated in an out of the pressure chambers, and a coating film formed on an exterior side of the nozzle plate, the coating film having multiple layers in a thickness direction thereof, each layer having liquid repelling regions and lyophilic regions.
Claims20
An ink jet head recording apparatus comprising an ink jet head that includes:
- a nozzle plate having a plurality of nozzles;
- a plurality of pressure chambers on an interior side of the nozzle plate and in fluid communication with the plurality of nozzles;
- an ink supply passage and an ink return passage by which ink is circulated in an out of the pressure chambers;
- and
- a coating film formed on an exterior side of the nozzle plate, the coating film having multiple layers in a thickness direction thereof, each layer having liquid repelling regions and lyophilic regions.
An ink jet head comprising:
- a nozzle plate having a plurality of nozzles;
- a plurality of pressure chambers on an interior side of the nozzle plate and in fluid communication with the plurality of nozzles;
- an ink supply passage and an ink return passage by which ink is circulated in an out of the pressure chambers;
- and
- a coating film formed on an exterior side of the nozzle plate, the coating film having multiple layers in a thickness direction thereof, each layer having liquid repelling regions and lyophilic regions.
A method of restoring liquid repelling property of an exterior side of a nozzle plate of an ink jet head, comprising:
- determining deterioration of the liquid repelling property in a top layer of a coating film formed on the exterior side of the nozzle plate and having multiple layers in a thickness direction thereof, each layer having liquid repelling regions and lyophilic regions;
- and
- driving a wiper blade across the exterior side of the nozzle plate to remove the top layer of the coating film and expose a next uppermost layer of the coating film.
Dependencies are inferred from the claim text.