Inkjet recording device

Patent metadata

Field	Value
Publication number	US-10857787-B2
Application number	US-201715681711-A
Country	US
Kind code	B2
Filing date	Aug 21, 2017
Priority date	Aug 22, 2016
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

Provided is an inkjet recording device, including a print head that includes a head base including: a nozzle from which ink is ejected; charging electrodes that charge the ink ejected from the nozzle; deflection electrodes that deflect the ink charged by the charging electrodes; and a gutter that collects ink not used in printing, and a head cover included in the head base, wherein the head base has a first horizontal uneven side portion, an oblique uneven side portion, and a second horizontal uneven side portion.

First claim

The invention claimed is:

1. An inkjet recording device comprising:
an ink container that contains ink used to print on a printed object;
a pump that pressures and feeds the ink;
a plurality of nozzles that are disposed in a print head and connected to the ink container, and from which the ink is ejected;
a forked path connecting from the ink container to the plurality of nozzles;
a flow control valve installed on a pipe connecting from the forked path to the plurality of nozzles, where the flow control valve is provided separately from the pump;
a plurality of sealing valves disposed in the print head, each of the plurality of sealing valves being configured to open a flow path that allows the ink to be supplied to one of the plurality of nozzles;
a plurality of gutters that collect the ink not used in printing;
a plurality of ink collection paths that are connected to the plurality of gutters;
a plurality of ink collection pumps that are connected to the plurality of ink collection paths;
a single exhaust air path of a solvent vapor connected to the ink container; and
solenoid valves for ink collection that are provided between the plurality of gutters and the plurality of ink collection pumps.

2. The inkjet recording device according to claim 1 , further comprising:
a single ink supply path connected to the ink container, wherein
the pump is a single ink supply pump connected to the ink supply path.

3. The inkjet recording device according to claim 1 , wherein
the plurality of ink collection pumps are capable of controlling a running of each of the ink collection pumps individually.

4. The inkjet recording device according to claim 1 , wherein
at least one of the plurality of ink collection paths is capable of stopping a flow of the ink at a nozzle side that an ejection of the ink is stopped.

5. The inkjet recording device according to claim 1 , wherein
at least one of the plurality of ink collection paths is capable of sucking a gas by running the plurality of ink collection pumps while stopping a flow of the ink at a nozzle side that an ejection of the ink is stopped.

6. The inkjet recording device according to claim 1 , wherein
the ink is capable of being concentrated by sucking a gas from the plurality of gutters.

7. The inkjet recording device according to claim 1 , wherein
a hole diameter of an ink ejection for at least one of the plurality of nozzles is different from a hole diameter of an ink ejection for the other nozzles.

8. The inkjet recording device according to claim 1 , further comprising:
different kinds of collection filters connected to the plurality of ink collection paths.

9. The inkjet recording device according to claim 1 , further comprising:
collection filters having different replacement cycles connected to the plurality of ink collection paths.

10. The inkjet recording device according to claim 1 , wherein
the forked path is disposed in a print head.

11. The inkjet recording device according to claim 1 , wherein
the exhaust air path is configured to be in fluid communication with an outside of a device body of the inkjet recording device.

12. The inkjet recording device according to claim 1 , further comprising:
a control unit, wherein the control unit independently controls each of the solenoid valves and the plurality of ink collection pumps, respectively, and independently controls an ejection and a collection of the ink from the plurality of nozzles.

13. The inkjet recording device according to claim 12 ,
wherein the sealing valves are independently controlled to supply the ink to the plurality of nozzles.

14. The inkjet recording device according to claim 12 , further comprising:
a heater for heating the ink on an ink supply path from the pump for supply to the forked path.

Assignees

• Hitachi Industry Equipment Systems Co Ltd

Inventors

• Arima Takahiro
• Maeda Akira
• Okano Mamoru

Classifications

• B41J2/08 Primary

  charge-control type · CPC title

• B41J2/185

  Ink-collectors; Ink-catchers · CPC title

• B41J2002/1853

  ink collectors for continuous Inkjet printers, e.g. gutters, mist suction means · CPC title

• B41J2/07

  characterised by jet control (B41J2/205 takes precedence) · CPC title

• B41J2/04555 Primary

  detecting current · CPC title