Back to results
US 12,703,182 B2Granted
Liquid ejection head
AssigneeRISO Technologies Corporation
InventorAkio Hamada
Life of this patent
Estimating the term…
Abstract
According to an embodiment, a liquid ejection head includes a vibration plate, a nozzle plate with nozzles, a plurality of pressure chambers between the vibration plate and the nozzle plate, and a piezoelectric member on a side of the vibration plate opposite of the pressure chambers. The piezoelectric member includes drive elements in a first area opposed to the pressure chambers via the vibration plate and configured to selectively vibrate the vibration plate to generate pressure changes in the pressure chambers and a plurality of pillar elements in a second area outside the first area and not opposed to the pressure chambers. The vibration plate includes at least one alignment mark at a position opposed to the second area of the piezoelectric member.
Claims18
A liquid ejection head, comprising:
- a vibration plate;
- a nozzle plate with a plurality of nozzles;
- a plurality of pressure chambers spaced in a first direction, the plurality of pressure chambers being between the vibration plate and the nozzle plate and connected to the plurality of nozzles;
- and
- a piezoelectric member on a side of the vibration plate opposite of the pressure chambers, the piezoelectric member including:
- a plurality of drive elements in a first area opposed to the plurality of pressure chambers via the vibration plate and configured to selectively vibrate the vibration plate to generate pressure changes in the plurality of pressure chambers, and
- a plurality of pillar elements in a second area outside the first area, the second area not being opposed to the plurality of pressure chambers via the vibration plate, wherein
- the vibration plate includes multiple alignment marks at positions opposed to the second area of the piezoelectric member,
- a first alignment mark of the multiple alignment marks extends lengthwise in a second direction perpendicular to the first direction and widthwise in the first direction, and
- a second alignment mark of the multiple alignment marks extends lengthwise in the first direction and widthwise in the second direction.
7 more elements
A liquid ejection head, comprising:
- a vibration plate;
- a nozzle plate with a plurality of nozzles;
- a plurality of pressure chambers spaced from each other along a first direction, the plurality of pressure chambers being between the vibration plate and the nozzle plate, the plurality of pressure chambers being connected to the plurality of nozzles;
- and
- a piezoelectric member on a side of the vibration plate opposite of the pressure chambers, the piezoelectric member including:
- a plurality of drive elements in a first area opposed to the plurality of pressure chambers via the vibration plate and configured to selectively vibrate the vibration plate to generate pressure changes in the plurality of pressure chambers, and
- a plurality of pillar elements in a second area outside the first area, the second area not being opposed to the plurality of pressure chambers via the vibration plate, wherein
- the vibration plate includes a plurality of alignment marks at positions opposed to the second area of the piezoelectric member,
- a first alignment mark extends lengthwise in a second direction perpendicular to the first direction and widthwise in the first direction, and
- a second alignment mark extends lengthwise in the first direction and widthwise in the second direction.
7 more elements
A liquid ejection apparatus, comprising:
- a media conveyor;
- and
- a liquid ejection head positioned to eject liquid onto a medium on the media conveyor, the liquid ejection head including:
- a vibration plate;
- a nozzle plate with a plurality of nozzles;
- a plurality of pressure chambers spaced in a first direction, the plurality of pressure chambers being between the vibration plate and the nozzle plate and connected to the plurality of nozzles;
- and
- a piezoelectric member on a side of the vibration plate opposite of the pressure chambers, the piezoelectric member including:
- a plurality of drive elements in a first area opposed to the plurality of pressure chambers via the vibration plate and configured to selectively vibrate the vibration plate to generate pressure changes in the plurality of pressure chambers, and
- a plurality of pillar elements in a second area outside the first area, the second area not being opposed to the plurality of pressure chambers via the vibration plate, wherein
- the vibration plate includes multiple alignment marks at positions opposed to the second area of the piezoelectric member,
- a first alignment mark of the multiple alignment marks extends lengthwise in a second direction perpendicular to the first direction and widthwise in the first direction, and
- a second alignment mark of the multiple alignment marks extends lengthwise in the first direction and widthwise in the second direction.
10 more elements
Dependencies are inferred from the claim text.