Multi-part fluid flow structure

Patent metadata

Field	Value
Publication number	US-9724927-B2
Application number	US-201615217390-A
Country	US
Kind code	B2
Filing date	Jul 22, 2016
Priority date	Dec 3, 2012
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

In one example, a multi-part flow structure with multiple flow passages includes a first part sandwiched between a second part and a third part, the parts joined together with adhesive along bonding surfaces surrounding the flow passages where each of the bonding surfaces on one part is symmetrical to and diverges from a corresponding one of the bonding surfaces on another part.

First claim

What is claimed is:

1. A multi-part fluid flow structure, comprising:
a first part including a first conduit, an opening from the first conduit, and a curved first bonding surface surrounding the opening from the first conduit;
a second part including a second conduit, an opening into the second conduit aligned with the opening from the first conduit, an opening from the second conduit, a curved second bonding surface surrounding the opening into the second conduit opposite and symmetrical to the first bonding surface, and a curved third bonding surface surrounding the opening from the second conduit;
a third part including a third conduit, an opening into the third conduit aligned with the opening from the second conduit, and a curved fourth bonding surface surrounding the opening into the third conduit opposite and symmetrical to the third bonding surface;
adhesive along the first and second bonding surfaces joining the first and second parts; and
adhesive along the third and fourth bonding surfaces joining the second and third parts.

2. The flow structure of claim 1 , where:
the first conduit comprises multiple first conduits, an upstream side of the first part includes multiple channels each to carry fluid to an opening into each of the first conduits, and the curved first bonding surface comprises multiple curved first bonding surfaces each surrounding the opening from one of the first conduits;
the second conduit comprises multiple second conduits, the curved second bonding surface comprises multiple curved second bonding surfaces each surrounding the opening into one of the second conduits, and the curved third bonding surface comprises multiple curved third bonding surfaces each surrounding the opening from one of the second conduits; and
the third conduit comprises multiple third conduits, the curved fourth bonding surface comprises multiple curved fourth bonding surfaces each surrounding the opening into one of the third conduits, and a downstream side of the third part includes multiple slots each to carry fluid away from an opening from each of the third conduits.

3. The flow structure of claim 2 , where each of the bonding surfaces transitions along a constant curve from a smaller interior part to a larger exterior part.

4. The flow structure of claim 3 , where each of the bonding surfaces transitions along a radius of at least 0.5 mm from the smaller interior part to the larger exterior part.

5. A printhead assembly, comprising:
a printhead; and
a multi-part flow structure with multiple flow passages to carry liquid to the printhead, the multi-part flow structure including a first part sandwiched between a second part and a third part, the parts joined together with adhesive along bonding surfaces surrounding the flow passages, where each of the bonding surfaces on one part is symmetrical to and diverges from a corresponding one of the bonding surfaces on another part.

6. The printhead assembly of claim 5 , where each bonding surface is a curved bonding surface.

7. The printhead assembly of claim 6 , where the curve of each bonding surface is constant.

8. The printhead assembly of claim 7 , where the printhead is mounted to the first part.

9. The printhead assembly of claim 8 , where liquid is to flow through the multi-part structure from the second part to the first part to the third part to the printhead.

10. A printhead assembly, comprising:
a printhead; and
a multi-part flow structure with multiple conduits to carry liquid to the printhead, the multi-part flow structure including a first part mounting the printhead and sandwiched between a second part and a third part, the parts joined together with adhesive along curved bonding surfaces each surrounding an opening into or out of one of the conduits.

11. The printhead assembly of claim 10 , where each of the curved bonding surfaces on one part is aligned with and symmetrical to a corresponding one of the curved bonding surfaces on another part.

12. The printhead assembly of claim 11 , where:
the first part includes an upstream side with multiple channels each to carry a liquid downstream to a corresponding conduit through the first part;
the second part includes multiple conduits each to carry a liquid through the second part from a corresponding one of the conduits in the first part; and
the third part includes multiple conduits each to carry liquid from a corresponding one of the conduits in the second part toward the printhead.

13. The printhead assembly of claim 12 , where the third part includes multiple expanding slots each to carry a liquid downstream to the printhead from a corresponding one of the conduits in the third part.

Assignees

• Hewlett Packard Development Co Lp

Inventors

• Donning Mark C
• Yliniemi Carey E
• Wickwire Robert S

Classifications

• B41J2/1433

  Structure of nozzle plates · CPC title

• B41J2/175 Primary

  Ink supply systems {; Circuit parts therefor} · CPC title

• B41J2202/14

  Mounting head into the printer · CPC title

• B41J2202/19

  Assembling head units · CPC title

• B41J2202/20

  Modules · CPC title