# US 9,039,145 B2 · Liquid ejecting apparatus

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- Number: US 9,039,145 B2
- Document ID: US9039145B2
- Status: Granted
- Kind: B2
- Application number: 14/444,046
- Filed: 2014-07-28
- Published: 2014-11-13
- Granted: 2015-05-26
- Earliest claimed: 2005-06-23
- Assignees: Seiko Epson Corporation
- Applicants: Seiko Epson Corporation
- Inventors: Fujio Akahane
- Web page: https://patentgrep.com/patent/US9039145B2

## CPC

- B41J 2/14209: {of finger type, chamber walls consisting integrally of piezoelectric material}
- B41J 2/045: by pressure, e.g. electromechanical transducers
- B41J 2/14: Structure thereof {only for on-demand ink jet heads}
- B41J 2/14201: {Structure of print heads with piezoelectric elements}
- B41J 2/14233: {of film type, deformed by bending and disposed on a diaphragm}
- B41J 2/14274: {of stacked structure type, deformed by compression/extension and disposed on a diaphragm}
- B41J 2/1433: {Structure of nozzle plates}
- B41J 2/15: for serial printing
- B41J 2/161: {of film type, deformed by bending and disposed on a diaphragm}
- B41J 2/16508: {connected with the printer frame}
- B41J 2002/14459: {Matrix arrangement of the pressure chambers}
- B41J 2002/14491: {Electrical connection}
- B41J 2202/20: Modules
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS

## Abstract

A liquid ejecting head includes: a nozzle plate formed with a plurality of nozzle orifices; a drive unit configured to apply pressure vibration to pressure generating chambers communicating to the plurality of nozzle orifices; and a head casing including the drive unit and having a surface opposed to the nozzle plate. The plurality of nozzle orifices defines a first nozzle array group and a second nozzle array group which are staggered, and the surface has a first recess and a second recess which are staggered.

## Claims

### Claim 1

A liquid ejecting head comprising:
a nozzle plate formed with a plurality of nozzle orifices;
a drive unit configured to apply pressure vibration to pressure generating chambers communicating to the plurality of nozzle orifices; and
a head casing including the drive unit and having a surface opposed to the nozzle plate, wherein
the plurality of nozzle orifices defines a first nozzle array group and a second nozzle array group which are staggered, and
the surface has a first recess and a second recess which are staggered.

### Claim 2 (depends on 1)

The liquid ejecting head according to claim 1, wherein the nozzle plate is fixed on the surface.

### Claim 3 (depends on 1)

The liquid ejecting head according to claim 1, wherein the first nozzle array group is arranged next to both the first and second recesses.

### Claim 4 (depends on 1)

The liquid ejecting head according to claim 1, wherein an arrangement of the first nozzle array and the second nozzle array is symmetrical to an arrangement of the first recess and the second recess.

### Claim 5 (depends on 1)

The liquid ejecting head according to claim 1, further comprising:
a flow channel formation substrate formed with the pressure generating chambers, and disposed between the head casing and the nozzle plate.

### Claim 6 (depends on 1)

The liquid ejecting head according to claim 1, wherein the head casing includes a plurality of block-shaped portions and a plurality of plate-shaped portions, and
a set of one of the block-shaped portions and one of the of plate-shaped portions defines the first recess.

### Claim 7 (depends on 1)

The liquid ejecting head according to claim 1, wherein the head casing includes a block-shaped portion and a plate-shaped portion which are arranged in a first direction, and
the block-shaped portion is thicker than the plate-shaped portion in a second direction perpendicular to the first direction.

### Claim 8 (depends on 1)

The liquid ejecting head according to claim 1, further comprising:
a head substrate electrically connected to the drive unit.

### Claim 9 (depends on 1)

The liquid ejecting head according to claim 1, further comprising:
a liquid introduction member in fluid communication with the nozzle plate.

### Claim 10 (depends on 1)

A liquid ejecting apparatus comprising:
the liquid ejecting head according to claim 1; and
a capping device configured to seal the plurality of nozzle orifices of the nozzle plate.