Liquid ejecting apparatus

Patent metadata

Field	Value
Publication number	US-10479097-B2
Application number	US-201816046886-A
Country	US
Kind code	B2
Filing date	Jul 26, 2018
Priority date	Jul 27, 2017
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

A liquid ejecting apparatus includes a liquid chamber that is in communication with a nozzle that ejects liquid, a volume changing device that changes volume of the liquid chamber, an inflow channel that is connected to the liquid chamber and enables the liquid to flow into the liquid chamber, a discharge channel that discharges the liquid, a first flow path resistance changing device that changes flow path resistance of the inflow channel, a liquid supply section that supplies the liquid to the inflow channel by pressurizing the liquid, and a bypass channel that enables the liquid supplied from the liquid supply section to bypass the inflow channel and to flow into the discharge channel.

First claim

What is claimed is:

1. A liquid ejecting head, comprising:
a plurality of liquid chambers that are in communication with a nozzle that ejects a liquid;
a plurality of volume changing devices that change a volume of the plurality of liquid chambers;
a plurality of inflow channels that are each connected to one of the plurality of liquid chambers and enables the liquid to flow into the respective liquid chambers;
a discharge channel that discharges the liquid and is connected to the plurality of inflow channels;
a plurality of first flow path resistance changing devices disposed in each of the plurality of inflow channels and that change a flow path resistance of a respective inflow channel;
a liquid supply section that supplies the liquid to the plurality of inflow channels by pressurizing the liquid; and
a bypass channel that enables the liquid supplied from the liquid supply section to bypass the plurality of inflow channels and to flow into the discharge channel,
wherein in a standby step in which the liquid ejecting head does not eject the liquid, the flow path resistance of the bypass channel is lower than a combined flow path resistance of the plurality of inflow channels whose flow path resistance has been changed by the plurality of first flow path resistance changing devices.

2. The liquid ejecting head according to claim 1 , further comprising:
an outflow channel that is connected to the liquid chamber and enables the liquid to flow from the liquid chamber to the discharge channel.

3. The liquid ejecting head according to claim 2 , further comprising:
a second flow path resistance changing device that changes flow path resistance of the outflow channel.

4. The liquid ejecting head according to claim 1 , further comprising:
a third flow path resistance changing device that changes flow path resistance of the bypass channel.

5. The liquid ejecting head according to claim 1 , wherein the liquid supply section is a metering pump.

6. A liquid ejecting head, comprising:
a plurality of liquid chambers that are in communication with a nozzle that ejects a liquid;
a plurality of volume changing devices that change a volume of the plurality of liquid chambers;
a supply flow channel that supplies the liquid to each of the plurality of liquid chambers;
a liquid supply section that supplies the liquid to the supply flow channel by pressurizing the liquid;
a plurality of first flow path resistance changing devices that change a flow path resistance;
a discharge flow channel that discharges the liquid; and
a bypass channel that connects the plurality of supply flow channels to the discharge flow channel without the plurality of liquid chambers being interposed therebetween,
wherein the plurality of first flow path resistance changing devices control flow path resistance of a plurality of fluid channels that are in communication with the plurality of liquid chambers,
wherein in a standby step in which the liquid ejecting head does not eject the liquid, the flow path resistance of the bypass channel is lower than a combined flow path resistance of the plurality of fluid channels whose flow path resistance has been changed by the plurality of first flow path resistance changing devices.

Assignees

• Seiko Epson Corp

Inventors

• Katakura Takahiro
• Nakamura Shinichi
• Sano Junichi
• Sakai Hirofumi
• Sugai Keigo

Classifications

• B41J2202/05

  Heads having a valve · CPC title

• B41J2/17523 Primary

  Ink connection · CPC title

• B41J2/17596

  Ink pumps, ink valves · CPC title

• B41J2/14274

  of stacked structure type, deformed by compression/extension and disposed on a diaphragm · CPC title

• B41J2202/12

  with ink circulating through the whole print head · CPC title