Liquid tank

Patent metadata

Field	Value
Publication number	US-10525722-B2
Application number	US-201816189494-A
Country	US
Kind code	B2
Filing date	Nov 13, 2018
Priority date	Nov 14, 2017
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

Provided is a liquid tank in which air bubbles are less likely to remain in a valve mechanism provided in an on-carriage-type liquid tank. The liquid tank has a liquid supply portion, a first liquid chamber, a second liquid chamber that can contain the liquid to be supplied to the first liquid chamber, and a valve mechanism that is arranged between the first liquid chamber and the second liquid chamber, and the valve mechanism has, inside an exterior wall constituting the valve mechanism, a channel member, a biasing member, a valve body, and a rod from an upstream side of flow of the liquid in the stated order, the channel member is provided inside the biasing member, and includes a first channel in which the liquid can pass, and the exterior wall and the biasing member form a second channel through which the liquid can pass therebetween.

First claim

What is claimed is:

1. A liquid tank that is mounted in a carriage provided with a liquid ejection head, comprising:
a liquid supply portion having a liquid supply port that receives a liquid introduction needle portion of the liquid ejection head, and to which the liquid introduction needle portion is detachably connected;
a first liquid chamber that can contain the liquid to be supplied to the liquid supply portion;
a second liquid chamber that is in communication with the first liquid chamber, and can contain the liquid to be supplied to the first liquid chamber; and
a valve mechanism that is arranged between the first liquid chamber and the second liquid chamber,
wherein the valve mechanism has, inside an exterior wall constituting the valve mechanism, a channel member, a biasing member, a valve body, and a rod from an upstream side of flow of the liquid in the stated order,
the channel member is provided inside the biasing member, and includes a first channel through which the liquid can pass, and
the exterior wall and the biasing member form a second channel through which the liquid can pass therebetween.

2. The liquid tank according to claim 1 being configured such that a channel resistance of the second channel is lower than a channel resistance of the first channel.

3. The liquid tank according to claim 1 ,
wherein the second channel is arranged downstream of the first channel.

4. The liquid tank according to claim 1 ,
wherein, in a usage state, the second channel is arranged above the first channel in a vertical direction.

5. The liquid tank according to claim 1 ,
wherein at least a portion of the channel member has a shape that runs along an inner periphery of the biasing member.

6. The liquid tank according to claim 1 ,
wherein at least a portion of the exterior wall that forms the second channel has a shape that runs along an outer periphery of the biasing member.

7. The liquid tank according to claim 1 ,
wherein at least of a portion of the channel member that receives one end of the biasing member is made of a film.

8. The liquid tank according to claim 1 ,
wherein, in a wall portion that encloses the valve body in a usage state, a communication portion through which the liquid can pass is provided on an upper side in the vertical direction.

9. The liquid tank according to claim 1 , further comprising:
a pressure receiving plate capable of abutting against one end of the rod with the valve body provided at the other end thereof;
a first film that covers the pressure receiving plate so as to be capable of abutting against the pressure receiving plate; and
a tank cover that covers the pressure receiving plate so as to be capable of abutting against the first film.

Assignees

• Seiko Epson Corp

Inventors

• Hirasawa Yusuke
• Koase Takashi
• Kudo Shoma

Classifications

• B41J29/13

  Cases or covers · CPC title

• B41J2/16517

  Cleaning of print head nozzles (B41J2/16505, B41J2/1707 take precedence) · CPC title

• B41J2/185

  Ink-collectors; Ink-catchers · CPC title

• B05C11/10

  Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material {(B05C1/0813, B05C5/0225, B05C17/002 and B05C19/06 take precedence)} · CPC title

• B41J2/17596 Primary

  Ink pumps, ink valves · CPC title