Liquid discharge apparatus and waste liquid tank

Patent metadata

Field	Value
Publication number	US-12036796-B2
Application number	US-202117491411-A
Country	US
Kind code	B2
Filing date	Sep 30, 2021
Priority date	Oct 9, 2020
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

A liquid discharge apparatus includes a discharging unit configured to be capable of discharging a plurality of kinds of liquids onto a medium, and a waste liquid tank including a storage part configured to store a waste liquid of the liquid. The waste liquid tank includes a first inflow port and a second inflow port from which the waste liquid flows into the storage part, and a restriction portion located between the first inflow port and the second inflow port, and configured to restrict movement of the waste liquid in the storage part.

First claim

What is claimed is:

1. A liquid discharge apparatus comprising:
a discharging unit configured to discharge a liquid onto a medium;
a waste liquid tank configured to be detachably attached to the liquid discharge apparatus, and including: a storage part configured to store a waste liquid which is not discharged onto the medium by the discharging unit; a first inflow port from which the waste liquid flows into the storage part; a second inflow port from which the waste liquid flows into the storage part; a third inflow port from which the waste liquid flows into the storage part; and a partition wall which forms a flow passage of the waste liquid partitioning the storage part;
a first introducing member configured for detachable connection to the first inflow port by an attachment of the waste liquid tank to the liquid discharge apparatus so as to introduce the waste liquid into the first inflow port, and configured to be separated from the first inflow port by a detachment of the waste liquid tank from the liquid discharge apparatus;
a second introducing member configured for detachable connection to the second inflow port by the attachment of the waste liquid tank to the liquid discharge apparatus so as to introduce the waste liquid into the second inflow port, and configured to be separated from the second inflow port by the detachment of the waste liquid tank from the liquid discharge apparatus; and
a third introducing member configured for detachable connection to the third inflow port by an attachment of the waste liquid tank to the liquid discharge apparatus so as to introduce the waste liquid into the third inflow port, and configured to be separated from the third inflow port by the detachment of the waste liquid tank from the liquid discharge apparatus,
wherein a position of the third inflow port in the flow passage is closer to the second inflow port than the first inflow port.

2. The liquid discharge apparatus according to claim 1 , wherein
the first inflow port and the second inflow port are spaced apart from each other in a direction crossing an attachment/detachment direction of the waste liquid tank,
the first introducing member and the second introducing member are spaced apart from each other in the direction crossing the attachment/detachment direction of the waste liquid tank,
the first inflow port is a first slot which opens in the attachment/detachment direction, and
the second inflow port is a second slot which opens in the attachment/detachment direction.

3. The liquid discharge apparatus according to claim 1 , wherein
the first inflow port is located in a first end portion of the flow passage, and the second inflow port is located in a second end portion of the flow passage.

4. The liquid discharge apparatus according to claim 1 , wherein
the flow passage is a flow passage bending in a middle.

5. The liquid discharge apparatus according to claim 1 , wherein
the waste liquid tank includes an absorbent member provided in the storage part and configured to absorb the waste liquid, and
a low wall portion, which is inserted into the absorbent member in a thickness direction of the absorbent member and whose height is smaller than a thickness of the absorbent member in the thickness direction, is provided in the flow passage between the second inflow port and the third inflow port.

6. The liquid discharge apparatus according to claim 5 , wherein
the position of the third inflow port is a position where the waste liquid permeates a side portion of the absorbent member.

7. The liquid discharge apparatus according to claim 1 , wherein
a diffusion wall configured to diffuse a flow of the waste liquid is provided in the flow passage.

8. The liquid discharge apparatus according to claim 1 , wherein
the discharging unit is a printing unit configured to perform printing by discharging a first liquid and a second liquid which is a different kind of liquid from the first liquid,
a waste liquid of the first liquid flows into the first inflow port through the first introducing member, and
a waste liquid of the second liquid flows into the second inflow port through the second introducing member.

9. The liquid discharge apparatus according to claim 8 , which further comprises a recovery unit configured to perform a recovery operation of a discharge performance of the printing unit, wherein
the medium is a sheet,
the first liquid is a pigment ink,
the second liquid is a dye ink,
a waste liquid of the pigment ink from the recovery unit flows into the first inflow port through the first introducing member, and
a waste liquid of the dye ink from the recovery unit flows into the second inflow port through the second introducing member.

10. The liquid discharge apparatus according to claim 9 , wherein
the waste liquid of the pigment ink discharged from the printing unit to an outside of the sheet flows into the third inflow port.

11. The liquid discharge apparatus according to claim 10 , wherein
the waste liquid tank is detachably attached to the liquid discharge apparatus, and
the first inflow port and each of the second inflow port and the third inflow port are spaced apart from each other in a direction crossing an attachment/detachment direction of the waste liquid tank.

12. A waste liquid tank configured for detachable attachment to a liquid discharge apparatus, the liquid discharge apparatus including a discharging unit configured to discharge a liquid onto a medium and first and second and third introducing members, the waste liquid tank comprising:
a storage part configured to store a waste liquid which is not discharged onto the medium by the discharging unit;
a first inflow port from which the waste liquid flows into the storage part;
a second inflow port from which the waste liquid flows into the storage part;
a third inflow port from which the waste liquid flows into the storage part; and
a partition wall which forms a flow passage of the waste liquid by partitioning the storage part,
wherein the first inflow port is configured for detachable attachment to the first introducing member, and is configured to be separated from the first introducing member by a detachment of the waste liquid tank from the liquid discharge apparatus,
wherein the second inflow port is configured for detachable attachment to the second introducing member, and is configured to be separated from the second introducing member by the detachment of the waste liquid tank from the liquid discharge apparatus,
wherein the third inflow port is configured for detachable attachment to the third introducing member, and is configured to be separated from the third introducing member by the detachment of the waste liquid tank from the liquid discharge apparatus, and
wherein a position of the third inflow port in the flow passage is closer to the second inflow port than the first inflow port.

Assignees

• Canon Kk

Inventors

• Takenaga Ken
• Iwakura Koya
• Matsumura Hideaki
• Hamano Tetsu
• Toki Nobuhiro
• Takeda Daiju
• Kameyama Fumie
• Shimada Koki
• Asada Shota
• Tanaka Yusuke
• Araki Yuta
• Maruyama Taiji
• Matsuyama Atsushi
• Naratani Yusuke
• Tanaka Kousuke

Classifications

• B41J2/1728

  Closed waste ink collectors · CPC title

• B41J2/135

  Nozzles · CPC title

• B41J29/13

  Cases or covers · CPC title

• B41J29/02

  Framework · CPC title

• B41J2/1721 Primary

  Collecting waste ink; Collectors therefor · CPC title