Inkjet printhead with metal alloy shim attachment of printhead chips

Patent metadata

Field	Value
Publication number	US-11065876-B2
Application number	US-201916435398-A
Country	US
Kind code	B2
Filing date	Jun 7, 2019
Priority date	Feb 6, 2017
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

An inkjet printhead includes: a manifold having a plurality of ink outlets defined in a manifold surface; a shim adhesively bonded to the manifold surface, the shim having apertures aligned with the ink outlets; at least one row of printhead chips adhesively bonded to the shim. The shim and the manifold are each comprised of an Invar metal alloy.

First claim

The invention claimed is:

1. An inkjet printhead comprising:
a manifold having a plurality of ink outlets defined in a manifold surface;
first and second longitudinal shim portions adhesively bonded to the manifold surface, the first and second longitudinal shim portions having apertures aligned with the ink outlets; and
first and second rows of printhead chips adhesively bonded to respective first and second longitudinal shim portions; and
wherein:
the first and second longitudinal shim portions and the manifold are each comprised of an Invar metal alloy.

2. The inkjet printhead of claim 1 , wherein the first and second longitudinal shim portions have a thickness in the range of 100 to 1000 microns.

3. The inkjet printhead of claim 1 , wherein the first and second longitudinal shim portions are interconnected via a plurality of trusses.

4. The inkjet printhead of claim 1 , wherein the manifold is a monolithic structure having a length suitable for pagewide printing onto A3-sized media.

5. The inkjet printhead of claim 1 , wherein the manifold comprises a plurality of longitudinally-extending ink supply channels.

6. The inkjet printhead of claim 5 , wherein the ink supply channels are arranged in pairs, each pair delivering two colors of ink to a respective row of printhead chips via respective ink outlets.

7. The inkjet printhead of claim 6 comprising at least two pair of ink supply channels and at least two rows of printhead chips.

8. The inkjet printhead of claim 1 , wherein one row comprises a plurality of printhead chips butted together in a line.

Assignees

• Memjet Technology Ltd

Inventors

• Thelander Jason
• Burke David
• Thomas Andrew

Classifications

• B41J2/14 Primary

  Structure thereof {only for on-demand ink jet heads} · CPC title

• B41J2002/14491

  Electrical connection · CPC title

• B41J2/21

  for multi-colour printing · CPC title

• B41J2202/20

  Modules · CPC title

• B41J2202/21

  Line printing · CPC title