# US 10,870,278 B2 · Inkjet printhead with sealed shield plate

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

- Number: US 10,870,278 B2
- Document ID: US10870278B2
- Status: Granted
- Kind: B2
- Application number: 16/460,904
- Filed: 2019-07-02
- Published: 2019-10-24
- Granted: 2020-12-22
- Earliest claimed: 2017-02-06
- Assignees: Memjet Technology Limited
- Applicants: Memjet Technology Limited
- Inventors: Elmer Dimaculangan Perez; Nicholas Chin; Miao Wang; See-Huat Tan; Jason Thelander; David Burke; Andrew Thomas; Mahes Rajaratnam
- Web page: https://patentgrep.com/patent/US10870278B2

## CPC

- B41J 2/1433: {Structure of nozzle plates}
- B41J 2/14: Structure thereof {only for on-demand ink jet heads}
- B41J 2/155: for line printing
- B41J 2002/14362: {Assembling elements of heads}
- B41J 2002/14419: {Manifold}
- 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

An inkjet printhead includes: a support structure having a plurality of printhead chips mounted thereto; and a shield plate bonded to the support structure, the shield plate having a slot aligned with the printhead chips, the slot having a perimeter edge. A sealant is disposed on all exposed portions of the support structure adjacent the perimeter edge of each slot.

## Claims

### Claim 1

An inkjet printhead comprising:
a support structure having a plurality of printhead chips mounted thereon; and
a shield plate bonded to the support structure, the shield plate having at least one slot aligned with one or more printhead chips, the slot having a perimeter edge, wherein:
a sealant is disposed on all exposed portions of the support structure adjacent the perimeter edge of each slot; and
an upper surface of the sealant tapers towards the support structure from an upper surface of the shield plate.

### Claim 2 (depends on 1)

The inkjet printhead claim 1, wherein the sealant extends continuously around an inner perimeter edge of each slot.

### Claim 3 (depends on 1)

The inkjet printhead of claim 1, wherein each printhead chip has a polymer encapsulant extending at least partially along a first longitudinal edge thereof, the sealant extending between a first longitudinal edge of each slot and the polymer encapsulant.

### Claim 4 (depends on 3)

The inkjet printhead of claim 3, wherein the polymer encapsulant encapsulates electrical connectors to the printhead chips.

### Claim 5 (depends on 3)

The inkjet printhead of claim 3, wherein each printhead chip has grout material extending at least partially along a second longitudinal edge thereof, the sealant extending between a second longitudinal edge of each slot and the grout material.

### Claim 6 (depends on 1)

The inkjet printhead of claim 1, wherein the sealant is comprised of an epoxy polymer.

### Claim 7 (depends on 1)

The inkjet printhead of claim 1, wherein the printhead chips are arranged in one or more rows, each slot being aligned with a respective row of printhead chips.

### Claim 8 (depends on 7)

The inkjet printhead of claim 7, wherein the printhead chips are arranged in first and second rows, the shield plate have first and second slots aligned with respective first and second rows of printhead chips.