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US 2008/0174641 A1Published application
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
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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.
Claims5
A liquid ejection head comprising:
- a pressure generating chamber forming plate that is made of a metal, that is formed with groove-like recess portions aligned in parallel with each other and that is formed with communication ports penetrated in a plate thickness direction at one ends of the groove-like recess portions;
- a nozzle plate that is made of a metal, that is bored with nozzle openings at positions thereof in correspondence with the communication ports;
- and
- a sealing plate that is made of a metal, that is for sealing opening faces of the groove-like recess portions and that is bored with liquid supply ports at positions thereof in correspondence with other ends of the groove-like recess portions, wherein:
- the liquid ejection head is constituted by bonding the sealing plate to a side of the pressure generating chamber forming plate where the groove-like recess portions are formed, and also bonding the nozzle plate to an opposite side of the pressure generating chamber forming plate;
- and
- the pressure generating chamber forming plate has a highly rigid portion between the groove-like recess portions each of which are arrayed in a row.
4 more elements
Dependencies are inferred from the claim text.