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EP-4739507-A1 - PRINT FLUID RESERVOIR

EP4739507A1EP 4739507 A1EP4739507 A1EP 4739507A1EP-4739507-A1

Abstract

A molded body (110) for a fluid ejection device assembly (100) may include a reservoir to store print fluid. The reservoir may include a main reservoir chamber (111), a sump (118) under and open to the main chamber, at least one protrusion (119) into the sump to support a foam body in the main reservoir chamber, and a fluid output (112) to output the print fluid to a fluid ejection device (121).

Inventors

  • STUDER, ANTHONY D.

Assignees

  • Hewlett-Packard Development Company, L.P.

Dates

Publication Date
20260513
Application Date
20230703

Claims (20)

  1. 1. A molded body for a fluid ejection device assembly, the molded body comprising: a reservoir to store print fluid therein, the reservoir comprising: a main reservoir chamber; a sump under, and open to, the main reservoir chamber; at least one protrusion into the sump to support a foam body in the main reservoir chamber; and a fluid output to output the print fluid to a fluid ejection device.
  2. 2. The molded body of claim 1 wherein an inner volume of the sump extends at least partially under the fluid output.
  3. 3. The molded body of claim 1 or 2, comprising a foam body in the main reservoir chamber, the foam body configured to soak the print fluid from the sump into the main reservoir chamber to output the print fluid out of the fluid output.
  4. 4. The molded body of any preceding claim, wherein the sump comprises a first sump and a second sump open to the main reservoir chamber.
  5. 5. The molded body of claim 4, wherein the first sump and the second sump are at lateral sides of the reservoir with the fluid output in between, the first sump and the second sump extending under the main reservoir chamber.
  6. 6. The molded body of any preceding claim, wherein a first protrusion of the at least one protrusion extends vertically upwards from a bottom wall of the sump.
  7. 7. The molded body of any preceding claim, wherein a second protrusion of the at least one protrusion extends horizontally inwards into the sump from a side wall of the sump.
  8. 8. The molded body of any preceding claim, wherein the sump comprises a plurality of side walls, and wherein a third protrusion of the at least one protrusion extends from a first side wall of the plurality of side walls to a second side wall of the plurality of side walls.
  9. 9. The molded body of claim 8, wherein the third protrusion comprises a substantially perpendicular bend between the first side wall and the second side wall.
  10. 10. The molded body of claim 8 or 9, wherein the third protrusion extends diagonally from the first side wall to the second side wall.
  11. 11. The molded body of any preceding claim, wherein the at least one protrusion comprises a plurality of protrusions, each of the plurality of protrusions extending to different lengths within the sump.
  12. 12. The molded body of any preceding claim, wherein the at least one protrusion comprises a plurality of protrusions, of the plurality of protrusions extending in a direction different from remaining ones of the plurality of protrusions.
  13. 13. The molded body of any preceding claim, wherein the at least one protrusion comprises a plurality of protrusions spaced apart from one another within the sump.
  14. 14. The molded body of any preceding claim, wherein the reservoir comprises: a second reservoir chamber, separate from the main reservoir chamber, the second reservoir chamber to store a second print fluid; and a third reservoir chamber, separate from the main reservoir chamber, the third reservoir chamber to store a third print fluid.
  15. 15. The molded body of claim 14, wherein the sump is open to only the main reservoir chamber.
  16. 16. The molded body of claim 15, further comprising a second support rib extending into a second sump of the second print fluid reservoir chamber.
  17. 17. A molded body for a fluid ejection device assembly, the molded body comprising: a reservoir to store print fluid therein, the reservoir comprising: a main volume; a first sump having a first volume under the main volume, wherein an external wall of the first sump forms a first cheek of the molded body; a second sump having a second volume under the main volume, wherein an external wall of the second sump forms a second cheek of the molded body; and a fluid output between the first cheek and the second cheek, the fluid output to output the print fluid to a fluid ejection device that extends between the cheeks.
  18. 18. The molded body of claim 17, wherein the first cheek and the second cheek are flush with the fluid ejection device.
  19. 19. The molded body of claim 17 or 18, further comprising at least one protrusion in at least one of the first sump or the second sump to support a foam body.
  20. 20. The molded body of claim 19, wherein the at least one protrusion comprises a plurality of support ribs, wherein the plurality of support ribs are spaced within at least one of the first sump or the second sump to prevent sinking in the molded body.

Description

PRINT FLUID RESERVOIR BACKGROUND [0001] Inkjet printing involves depositing ink onto a surface, such as sheet of paper. Print fluid can be stored in a print fluid reservoir until it is used for printing. Fluid ejection device assemblies may include print fluid reservoirs and a fluid ejection die attached to the reservoir. BRIEF DESCRIPTION OF THE DRAWINGS [0002] FIG. 1 illustrates an example fluid ejection device assembly including a protrusion into a sump of a molded body. [0003] FIG. 2 illustrates an example molded body in a fluid ejection device assembly. [0004] FIG. 3 illustrates an example fluid ejection device assembly. [0005] FIG. 4 illustrates a perspective view of an example molded body. [0006] FIG. 5 illustrates a perspective view of an example fluid ejection device assembly including the molded body of FIG. 4 and an example fluid ejection device. [0007] FIG. 6 illustrates a perspective view of the fluidic structure assembly of FIG. 5. [0008] FIG. 7 illustrates a perspective view of another example fluid ejection device assembly. [0009] FIG. 8 illustrates an exploded view of the example fluid ejection device assembly of FIG. 7. [0010] FIG. 9 illustrates another exploded view of the example fluid ejection device assembly of FIG. 7. [0011] FIG. 10 illustrates a cross-section view of a molded body of the fluid ejection device assembly of FIG. 7. [0012] FIG. 11 illustrates a view of a bottom portion of the molded body of the fluid ejection device assembly of FIG. 7. [0013] FIG. 12 illustrates a perspective view of the fluid ejection device assembly of FIG. 7. [0014] FIG. 13 illustrates a bottom view of a portion of the fluid ejection device assembly of FIG. 7. [0015] FIG. 14 illustrates a bottom view of the fluid ejection device assembly of FIG. 7. [0016] FIG. 15 illustrates a perspective view of sumps of the molded body of the fluid ejection device assembly of FIG. 7. [0017] FIG. 16 illustrates a perspective view of the molded body of the fluid ejection device assembly of FIG. 7 including example support ribs. [0018] FIG. 17 illustrates a top interior view of the molded body including support ribs of FIG. 16. [0019] FIG. 18 illustrates a top interior view of the molded body of FIG. 7 including an alternative example arrangement of support ribs. [0020] FIG. 19 illustrates a perspective view of the molded body 410 of FIG. 7 including the alternative arrangement of support ribs of FIG. 18. [0021] FIG. 20 illustrates the molded body of FIG. 16 formed with coring to reduce a sump volume. [0022] FIG. 21 illustrates a perspective view of a bottom of the molded body of FIG. 20. [0023] The foregoing and other features of the present disclosure will become apparent from the following description and appended claims, taken in conjunction with the accompanying drawings. Understanding that these drawings depict only several examples in accordance with the disclosure and are therefore, not to be considered limiting of its scope, the disclosure will be described with additional specificity and detail through use of the accompanying drawings. DETAILED DESCRIPTION [0024] In the following detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, similar symbols typically identify similar components, unless context dictates otherwise. The illustrative examples described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here. It will be readily understood that the aspects of the present disclosure, as generally described herein, and illustrated in the figures, can be arranged, substituted, combined, and designed in a wide variety of different configurations, all of which are explicitly contemplated and made part of this disclosure. [0025] This disclosure relates to fluid ejection device assemblies. A fluid ejection device assembly may include a fluid ejection device for dispensing print fluid and a reservoir for storing the print fluid. The print fluid may include any 2D or 3D print agent including ink for printing on a medium such as paper (2D) or (e.g., powdered) build material (3D). The print fluid may include dispensable fluid to be dispensed at relatively high precision (as to volume and/or location) for fields of implementation other that 2D or 3D imaging, including but not limited to forensic, laboratory or pharmaceutical applications. [0026] FIG. 1 illustrates an example fluid ejection device assembly 100 including a protrusion 119 into a sump 118 of a molded body 110. Fig. 1 may represent a diagrammatical side view. The fluid ejection device assembly 100 may be used to store and eject print fluid in a controlled manner for printing. The fluid ejection device assembly 100 may be a replaceable print cartridge, for example for inkjet printing. The molded body 110 includes a reservoir to