Fluid ejection devices with particle tolerant thin-film extensions

Patent metadata

Field	Value
Publication number	US-2016082732-A1
Application number	US-201514958870-A
Country	US
Kind code	A1
Filing date	Dec 3, 2015
Priority date	Jul 24, 2012
Publication date	Mar 24, 2016
Grant date	—

Abstract

Fluid ejection devices with particle tolerant thin-film extensions are disclosed. An example apparatus includes a printer; a reservoir; and a printhead including: a firing chamber; a channel to receive fluid from the reservoir, the channel is coupled to the firing chamber, the channel having an opening; and a particle-tolerant film disposed adjacent the opening of the channel, the particle-tolerant film disposed between the channel and the reservoir, the particle-tolerant film to deter particles within the fluid from settling in an area adjacent the opening.

First claim

What is claimed is:

1 . An apparatus, comprising:
a printer; a reservoir; and a printhead including:
a firing chamber;
a channel to receive fluid from the reservoir, the channel coupled to the firing chamber, the channel having an opening; and
a particle-tolerant film disposed adjacent the opening of the channel, the particle-tolerant film disposed between the channel and the reservoir, the particle-tolerant film to deter particles within the fluid from settling in an area adjacent the opening.

2 . The apparatus of claim 1 , wherein the particle-tolerant film covers the opening.

3 . The apparatus of claim 1 , further including an inkjet cartridge including the printhead and the reservoir, the inkjet cartridge removably received by the printer.

4 . The apparatus of claim 1 , wherein the printhead includes a substrate layer and a chamber layer, the substrate layer and the chamber layer including a slot fluidly coupled to the channel.

5 . The apparatus of claim 4 , further including a thin-film layer disposed between the substrate layer and the chamber layer, the thin-film layer including the particle-tolerant film.

6 . The apparatus of claim 4 , wherein the particle-tolerant film extends across the slot.

7 . The apparatus of claim 6 , wherein the particle-tolerant film defines an ink feed hole.

8 . The apparatus of claim 1 , wherein the printhead further includes pillars disposed adjacent the opening to deter particles within the fluid from entering the opening.

9 . The apparatus of claim 8 , wherein the particle-tolerant film extends between the pillars.

10 . The apparatus of claim 8 , wherein the particle-tolerant film includes protrusions that extend between the pillars.

11 . The apparatus of claim 8 , wherein the pillars include a first pillar, a second pillar, and a third pillar, the second pillar disposed between the first pillar and the third pillar, the particle-tolerant film including a first protrusion and a second protrusion, the first protrusion extending between the first pillar and the second pillar, the second protrusion extending between the second pillar and the third pillar.

12 . The apparatus of claim 11 , wherein the first pillar has a first length and the second pillar has a second length different from the first length.

13 . The apparatus of claim 8 , wherein the pillars are first pillars, further including second pillars disposed adjacent the opening to deter particles within the fluid from entering the opening, the first pillars extending in a first direction, the second pillars extending in a second direction opposite the first direction.

14 . The apparatus of claim 13 , wherein the first pillars are on-shelf pillars and the second pillars are hanging pillars.

15 . The apparatus of claim 13 , wherein the area adjacent the opening is disposed between the first pillars and the second pillars.

16 . The apparatus of claim 1 , wherein the channel is a recirculation channel.

17 . An apparatus, comprising:
a printhead including:
a firing chamber;
a channel to receive fluid from a reservoir, the channel coupled to the firing chamber; and
a particle-tolerant film disposed adjacent an opening of the channel, the particle-tolerant film disposed between the channel and the reservoir, the particle-tolerant film to deter particles within the fluid from settling in an area adjacent the opening.

18 . The apparatus of claim 17 , further including pillars disposed adjacent the opening to deter particles within the fluid from entering the opening.

19 . The apparatus of claim 18 , wherein the particle-tolerant film includes protrusions that extend between the pillars.

20 . The apparatus of claim 18 , wherein the pillars include a first pillar, a second pillar, and a third pillar, the second pillar disposed between the first pillar and the third pillar, the particle-tolerant film including a first protrusion and a second protrusion, the first protrusion extending between the first pillar and the second pillar, the second protrusion extending between the second pillar and the third pillar.

Assignees

• Hewlett Packard Development Co

Inventors

• Rivas Rio
• Friesen Ed
• Jensen Kellie Susanne

Classifications

• B41J2/14201

  Structure of print heads with piezoelectric elements · CPC title

• B41J2/1404 Primary

  Geometrical characteristics · CPC title

• B41J2202/12

  with ink circulating through the whole print head · CPC title

• B41J2002/14467

  Multiple feed channels per ink chamber · CPC title

• B41J2/14427 Primary

  Structure of ink jet print heads with thermal bend detached actuators · CPC title