# US 10,500,852 B2 · Liquid jet head and liquid jet device

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- Number: US 10,500,852 B2
- Document ID: US10500852B2
- Status: Granted
- Kind: B2
- Application number: 16/028,954
- Filed: 2018-07-06
- Published: 2019-01-10
- Granted: 2019-12-10
- Earliest claimed: 2017-07-10
- Assignees: Sii Printek Inc.
- Applicants: SII Printek Inc.
- Inventors: Yuichiro Hamano; Kazuyoshi Tominaga; Takanori Koyano; Atsushi Kozuki; Kenji Suzuki; Masaki Miyagi
- Web page: https://patentgrep.com/patent/US10500852B2

## CPC

- B41J 2/14145: {Structure of the manifold}
- B41J 2/04541: {Specific driving circuit}
- B41J 2/04563: {detecting head temperature; Ink temperature}
- B41J 2/0458: {controlling heads based on heating elements forming bubbles}
- B41J 2/14209: {of finger type, chamber walls consisting integrally of piezoelectric material}
- B41J 2/175: Ink supply systems {; Circuit parts therefor}
- B41J 2/17563: {Ink filters}
- B41J 2/18: Ink recirculation systems
- B41J 2002/14362: {Assembling elements of heads}
- B41J 2002/14403: {including a filter}
- B41J 2002/14419: {Manifold}
- B41J 2002/14491: {Electrical connection}
- B41J 2202/07: dealing with air bubbles
- B41J 2202/08: dealing with thermal variations, e.g. cooling
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS

## Abstract

There are provided a liquid jet head and a liquid jet device capable of achieving reduction in size. There are included a first head chip and a second head chip stacked on one another in the Y direction, a first flow channel member disposed on the −Y direction side of the first head chip, and having an inflow port communicated with an ink tank, and a first ink flow channel adapted to communicate the inflow port and the first head chip with each other, a second flow channel member disposed on the +Y direction of the second head chip, and having a second ink flow channel communicated with the second head chip, and a communication flow channel located between the first flow channel member and the second flow channel member, and adapted to communicate the first ink flow channel and the second ink flow channel with each other.

## Claims

### Claim 1

A liquid jet head comprising:
a first head chip and a second head chip stacked on one another in a first direction, and each adapted to jet liquid;
a first flow channel member disposed on an opposite side of the first head chip to the second head chip in the first direction, and including an inflow port communicated with a supply source of the liquid and a first liquid flow channel adapted to communicate the inflow port and the first head chip with each other;
a second flow channel member disposed on an opposite side of the second head chip to the first head chip in the first direction, and including a second liquid flow channel communicated with the second head chip; and
a communication flow channel located between the first flow channel member and the second flow channel member, and adapted to communicate the first liquid flow channel and the second liquid flow channel with each other, wherein
the first liquid flow channel includes a first supply flow channel opening the first head chip, the liquid flowing through the first supply flow channel inflowing into the first head chip, and
the second liquid flow channel includes a second supply flow channel opening the second head chip, the liquid flowing through the second supply flow channel inflowing into the second head chip.

### Claim 2 (depends on 1)

The liquid jet head according to claim 1, wherein
the communication flow channel is a penetration hole adapted to penetrate the first head chip and the second head chip in the first direction.

### Claim 3 (depends on 1)

The liquid jet head according to claim 1, wherein
the first flow channel member supports a drive board adapted to drive any of the first head chip and the second head chip.

### Claim 4 (depends on 3)

The liquid jet head according to claim 3, wherein
a first driver adapted to drive the first head chip and a second driver adapted to drive the second head chip are mounted on the drive board,
the first head chip and the first driver are electrically connected to each other via the drive board, and
the second head chip and the second driver are electrically connected to each other via a wiring board branched from the drive board.

### Claim 5 (depends on 1)

The liquid jet head according to claim 1, wherein
a temperature sensor adapted to detect a temperature of the liquid is installed in the second flow channel member.

### Claim 6 (depends on 1)

The liquid jet head according to claim 1, wherein
the first head chip includes
a first actuator plate provided with a jet channel into which the liquid inflows, and
a first cover plate stacked on the first actuator plate in the first direction, and provided with a liquid chamber adapted to connect the jet channel and the first liquid flow channel to each other, and
the second head chip includes
a second actuator plate provided with a jet channel into which the liquid inflows, and stacked on the first actuator plate on an opposite side to the first cover plate in the first direction, and
a second cover plate stacked on the second actuator plate in the first direction, and provided with a liquid chamber adapted to connect the jet channel and the second liquid flow channel to each other.

### Claim 7 (depends on 1)

A liquid jet device comprising:
the liquid jet head according to claim 1.