US 11,141,982 B2Granted

Liquid ejection head

AssigneeBrother Kogyo Kabushiki Kaisha

InventorTaisuke Mizuno

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Abstract

A liquid ejection head includes pressure chambers arranged in a first direction, a common channel, and a communicating portion communicating with the common channel and each of the pressure chambers. The common channel includes a supply portion, a return portion, and a connection portion connecting them in a second direction crossing the first direction. The liquid ejection head has a first vector directed from the supply portion via the connection portion toward the return portion and has a component in the second direction. The second vector is directed from the common channel via the communicating portion toward each of the pressure chambers and has a component in the second direction. The component in the second direction of the first vector and the component in the second direction of the second vector point in the same direction.

Claims21

Dependent claims

A liquid ejection head comprises:

a plurality of pressure chambers arranged in a first direction;
a common channel extending in the first direction and including:
a supply portion having a supply opening;
a return portion having a return opening and being located alongside the supply portion in a second direction crossing the first direction;
and
a connection portion connecting the supply portion and the return portion in the second direction;
and
a communicating portion communicating with the common channel and each of the pressure chambers,
wherein a first vector is directed from the supply portion via the connection portion toward the return portion and has a component in the second direction,
wherein a second vector is directed from a junction between the communicating portion and the return portion via the communicating portion toward each of the pressure chambers and has a component in the second direction, and
wherein the component in the second direction of the first vector and the component in the second direction of the second vector point in the same direction.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/825,070Filed 20 Mar 2020
Priority: JP JP2019-0696111 Apr 2019
Published: US 2020/0307225 A11 Oct 2020
Granted: 12 Oct 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

B41J 2/175
Characterised by ink handling: ink supply systems ; Circuit parts therefor
B41J 2/04581
Control methods or devices therefor, e.g. driver circuits, control circuits: controlling heads based on piezoelectric elements
B41J 2/135
Ink jet: nozzles
B41J 2/14233
Structure of print heads with piezoelectric elements: of film type, deformed by bending and disposed on a diaphragm