Liquid ejection module and liquid ejection head

Patent metadata

Field	Value
Publication number	US-9931845-B2
Application number	US-201615388725-A
Country	US
Kind code	B2
Filing date	Dec 22, 2016
Priority date	Jan 8, 2016
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

A liquid ejection module and a liquid ejection head capable of suppressing unevenness in printing are provided. Accordingly, openings are disposed so that a center position of at least one of openings in a plurality of ejection opening rows is not disposed on the same line extending in a print medium movement direction in a relative movement with respect to center positions of the other openings.

First claim

What is claimed is:

1. A liquid ejection module that is used in a page wide type liquid ejection head ejecting a liquid from an ejection opening to a relatively moving print medium, the liquid ejection module comprising:
a print element board that includes first and second ejection opening rows, in which ejection openings ejecting a liquid are arranged in a direction intersecting the relative movement direction, and first and second liquid supply paths respectively supplying a liquid to the first and second ejection opening rows and extending in the intersection direction; and
first and second openings that respectively communicate with the first and second liquid supply paths to respectively supply a liquid to the first and second liquid supply paths,
wherein a gravity center of the first opening and a gravity center of the second opening are deviated from a line extending in the relative movement direction.

2. The liquid ejection module according to claim 1 , further comprising:
a support member that supports the print element board and includes a communication opening supplying a liquid to at least one of the first and second openings; and
a wiring board that supplies electric energy to an ejection energy generation element provided at the print element board.

3. The liquid ejection module according to claim 1 ,
wherein a plurality of the first and second openings are provided in the first and second liquid supply paths.

4. The liquid ejection module according to claim 1 , further comprising:
a third ejection opening row in which ejection openings ejecting a liquid are arranged in a direction intersecting the relative movement direction;
a third liquid supply path that supplies a liquid to the third ejection opening row and extends in the intersection direction; and
a third opening that supplies a liquid to the third liquid supply path,
wherein gravity centers of the first, second, and third openings are located on a line inclined with respect to a line extending in the relative movement direction.

5. The liquid ejection module according to claim 1 ,
wherein the print element board includes an ejection energy generation element that generates energy used to eject a liquid, a pressure chamber that includes the ejection energy generation element provided therein, and a liquid collection path that collects a liquid from the pressure chamber and extends in the intersection direction.

6. The liquid ejection module according to claim 5 , further comprising:
a collection opening that collects a liquid from the liquid collection path.

7. The liquid ejection module according to claim 1 ,
wherein the first and second liquid supply paths are provided at a face opposite to a face provided with the ejection opening in the print element board, and
wherein the first and second openings are provided at a film member provided at the opposite face of the print element board.

8. The liquid ejection module according to claim 1 ,
wherein the same liquid is supplied to the first and second liquid supply paths.

9. The liquid ejection module according to claim 1 ,
wherein a length of a longest liquid path of a plurality of ejection openings to which a liquid is supplied from the first opening is equal to a length of a longest liquid path of a plurality of ejection openings to which a liquid is supplied from the second opening.

10. The liquid ejection module according to claim 1 ,
wherein an outer shape of the print element board is formed in a substantially parallelogram shape.

11. The liquid ejection module according to claim 1 ,
wherein the print element board includes a plurality of supply openings that supply a liquid from the first liquid supply path to the ejection opening and the plurality of supply openings extend in a thickness direction of the print element board.

12. The liquid ejection module according to claim 1 ,
wherein the print element board includes an ejection energy generation element that generates energy used to eject a liquid and a pressure chamber that includes the ejection energy generation element provided therein, and
wherein a liquid inside the pressure chamber is circulated to the outside of the pressure chamber.

13. A liquid ejection head that is of a page wide type and ejects a liquid from an ejection opening to a relatively moving print medium, the liquid ejection head comprising:
a print element board that includes first and second ejection opening rows in which ejection openings ejecting a liquid are arranged in a direction intersecting the relative movement direction and first and second liquid supply paths respectively supplying a liquid to the first and second ejection opening rows and extending in the intersection direction; and
a lid member that includes first and second openings that respectively communicate with the first and second liquid supply paths to respectively supply a liquid to the first and second liquid supply paths and forms a part of the first and second liquid supply paths,
wherein a gravity center of the first opening and a gravity center of the second opening are deviated from a line extending in the relative movement direction.

14. The liquid ejection head according to claim 13 ,
wherein the lid member is a photosensitive film member.

15. The liquid ejection head according to claim 13 ,
wherein the print element board includes a third ejection opening row in which ejection openings ejecting a liquid are arranged in a direction intersecting the relative movement direction and a third liquid supply path that supplies a liquid to the third ejection opening row and extends in the intersection direction,
wherein the lid member includes a third opening that supplies a liquid to the third liquid supply path, and
wherein gravity centers of the first, second, and third openings are located on a line inclined with respect to a line extending in the relative movement direction.

16. The liquid ejection head according to claim 13 ,
wherein the print element board includes an ejection energy generation element that generates energy used to eject a liquid, a pressure chamber that includes the ejection energy generation element provided therein, and a liquid collection path that collects a liquid from the pressure chamber and extends in the intersection direction, and
wherein the lid member includes a collection opening that collects a liquid from the liquid collection path.

17. The liquid ejection head according to claim 13 , further comprising:
a support member that supports a plurality of the print element boards,
wherein the plurality of print element boards are arranged in a linear shape in the intersection direction.

18. The liquid ejection head according to claim 13 ,
wherein the print element board includes an ejection energy generation element that generates energy used to eject a liquid and a pressure chamber that includes the ejection energy generation element provided therein, and
wherein a liquid inside the pressure chamber is circulated to the outside of the pressure chamber.

19. A liquid ejection head comprising:
a plurality of print element boards that eject a liquid from an ejection opening to a relatively moving print medium,
wherein the ejection opening communicates with a passage provided at the print element board and extending in a direction intersecting the relative movement direction,
wherein a plurality of the ejection openings form a plurality of ejection opening rows along the passage,
wherein each print element board provided wi

Assignees

• Canon Kk

Inventors

• Moriya Takatsugu
• Kasai Shintaro
• Nakagawa Yoshiyuki
• Saito Akiko
• Ishida Koichi
• Yamada Tatsuya
• Iwanaga Shuzo
• Tozuka Ayako
• Ishiwata Tomoki
• Sato Tomohiro

Classifications

• B41J2/18

  Ink recirculation systems · CPC title

• B41J2/155 Primary

  for line printing · CPC title

• B41J2/14072

  Electrical connections, e.g. details on electrodes, connecting the chip to the outside... · CPC title

• B41J2202/12

  with ink circulating through the whole print head · CPC title

• B41J2002/012

  with intermediate transfer member · CPC title