# US 9,873,249 B2 · Liquid ejecting head and liquid ejecting apparatus

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 9,873,249 B2
- Document ID: US9873249B2
- Status: Granted
- Kind: B2
- Application number: 15/151,729
- Filed: 2016-05-11
- Published: 2016-09-01
- Granted: 2018-01-23
- Earliest claimed: 2011-11-21
- Assignees: Seiko Epson Corporation
- Applicants: Seiko Epson Corporation
- Inventors: Shunsuke Watanabe; Yoshinao Miyata; Satoshi Oguchi; Hiroaki Okui
- Web page: https://patentgrep.com/patent/US9873249B2

## CPC

- B41J 2/1433: {Structure of nozzle plates}
- B41J 2/055: Devices for absorbing or preventing back-pressure
- B41J 2/14233: {of film type, deformed by bending and disposed on a diaphragm}
- B41J 2/175: Ink supply systems {; Circuit parts therefor}
- B41J 2002/14241: {having a cover around the piezoelectric thin film element}
- B41J 2002/14306: {Flow passage between manifold and chamber}
- B41J 2002/14419: {Manifold}
- B41J 2002/14491: {Electrical connection}
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS

## Abstract

A liquid ejecting head comprises a unit head bonded to a communication substrate. Liquid chamber forming portions are formed in the unit case, along a first direction at positions that are separated by a partition wall. Empty liquid chamber portions and supply-side communication paths are formed in the communication substrate. The supply-side communication paths include a common communication path formed in an opposite side with a thin thickness portion left in the surface side of the communication substrate, and individual communication paths. With a surface of the partition wall and a surface of the thin thickness portion bonded together, the empty liquid chamber forming portions and the empty liquid chamber portions communicate with each other so as to define common liquid chambers.

## Claims

### Claim 1

A liquid ejecting head comprising:
a nozzle plate defining a plurality of nozzles;
a pressure chamber forming substrate in which a plurality of pressure chambers are formed;
a plurality of pressure generators corresponding to the plurality of pressure chambers respectively;
a communication member that is a single plate, and has a plurality of nozzle communication paths that allows communication between one of the pressure chambers and a corresponding one of the nozzles;
a common liquid chamber which has a part arranged within the communication member;
a plurality of individual communication paths which allows communication between the part of the common liquid chamber and the one of the pressure chambers;
a case member that defines a portion of the common liquid chamber; and
wherein one of the individual communication paths has an end arranged at a position on an opposite side to the pressure generator of the one of the pressure chambers.

### Claim 2 (depends on 1)

The liquid ejecting head according to claim 1,
wherein the communication member has a thin portion which is thinner than a thickness of the communication member, the thin portion forming a part of the one of the individual communication paths.

### Claim 3 (depends on 2)

The liquid ejecting head according to claim 2,
wherein the thin portion forms the part of the common liquid chamber.

### Claim 4 (depends on 3)

The liquid ejecting head according to claim 3,
wherein the case member is provided in contact with the thin portion to form the common liquid chamber with the communication member.

### Claim 5 (depends on 1)

The liquid ejecting head according to claim 1,
wherein the case member encloses the pressure chamber forming substrate.

### Claim 6 (depends on 1)

The liquid ejecting head according to claim 1,
wherein the one of the individual communication paths is provided in the communication member.

### Claim 7 (depends on 6)

The liquid ejecting head according to claim 6,
wherein the pressure generator has an electrode, and
wherein the end of the one of the individual communication paths faces the pressure generator.