Method of working small recess portion, method of fabricating liquid ejection head and liquid ejection head
AssigneeSeiko Epson Corporation
InventorsHideyuki Ogawa, Koichi Saito, Nagamitsu Takashima, Katsunori Ono
Life of this patent
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Abstract
The invention is directed to a method of working a small recess portion. In the method, prior to press-forming small recess portions arrayed in a row by pressing a predetermined number of pieces of aligned male dies to a metal base plate, the metal base plate is previously formed with a highly rigid portion at a predetermined portion at a vicinity of an imaginary line extending in a row direction along end portions of predicted press portions to which the respective male dies are pressed.
Claims15
A liquid ejection head comprising:
- a pressure generating chamber plate formed with a plurality of pressure generating chambers each of which extends in a first direction and which are aligned in a second direction extending across the first direction, the pressure generating chamber plate formed with a groove which extends in the second direction and which is arranged apart from the plurality of pressure generating chambers as seen in the first direction, the groove including a first portion and a second portion;
- and
- a nozzle plate formed with a plurality of nozzle openings corresponding to the plurality of pressure generating chambers,
- wherein a thickness of the groove in the first portion is less than a thickness of the groove in the second portion in the pressure generating chamber plate thickness direction, and
- the second portion has a bottom.
A liquid ejection head comprising:
- a pressure generating chamber plate formed with a plurality of pressure generating chambers each of which extends in a first direction and which are aligned in a second direction extending across the first direction, the pressure generating chamber plate formed with a groove which extends in the second direction and which is arranged apart from the plurality of pressure generating chambers as seen in the first direction, the groove including a first portion and a second portion;
- and
- a nozzle plate formed with a plurality of nozzle openings corresponding to the plurality of pressure generating chambers,
- wherein a width of the groove in the first portion is less than a width of the groove in the second portion in the first direction, and
- the first portion and the second portion are arranged in the second direction.
A liquid ejection head comprising:
- a pressure generating chamber plate formed with a plurality of pressure generating chambers each of which extends in a first direction and which are aligned in a second direction extending across the first direction, the pressure generating chamber plate formed with a groove which extends in the second direction and which is arranged apart from the plurality of pressure generating chambers as seen in the first direction, the groove including a first portion and a second portion;
- and
- a nozzle plate formed with a plurality of nozzle openings corresponding to the plurality of pressure generating chambers,
- wherein the first portion includes a bottom and the second portion includes an opening, and
- a bottom of the groove includes an opening portion and an unopened portion.
Dependencies are inferred from the claim text.