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Ink jet printing apparatus

一种喷墨印刷、印刷部的技术，应用在着墨装置、印刷等方向，能够解决驱动率低等问题

Active Publication Date: 2018-05-11
RISO KAGAKU CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Here, when the pressure is maintained after the set pressure is generated, the drive rate (drive duty) of the air pump is lower than the drive rate when the set pressure is generated.

Method used

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Examples

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Embodiment Construction

[0014] Embodiments will be described below with reference to the drawings. In the drawings, the same symbols are attached to the same or equivalent structural elements.

[0015] Embodiments described below are examples of devices and the like for realizing the technical idea of ​​the present invention. The technical idea of ​​the present invention is not limited to the material, shape, structure, arrangement, etc. of each component in the following embodiments, and various changes can be made within the claims.

[0016] Such as figure 1 As shown, the inkjet printing device 1 according to the present embodiment includes four printing units 2 , a pressure generating unit 3 , a transfer unit 4 , and a control unit 5 .

[0017] Each printing unit 2 circulates ink, and ejects ink onto the paper conveyed by the conveying unit 4 to print an image. The four printing units 2 eject inks of different colors (for example, black, cyan, magenta, and yellow). The four printing units 2 ha...

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PUM

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Abstract

An ink jet printing apparatus is provided with: a pressurized air space and a depressurized air space for circulating ink along a circulation path; a main connection path and an adjustment path for connecting the pressurized air space and the depressurized air space to each other; an air pump for supplying air from the depressurized air space to the pressurized air space via the main connection path or the adjustment path; a changeover device for switching between the main connection path and the adjustment path; and a controller. The controller generates respective preset pressures in the pressurized air space and the depressurized air space with the air pump in a state in which the main connection path is set, and thereafter controls the air pump in a state in which the main connection path is switched to the adjustment path to maintain the pressures of the pressurized air space and the depressurized air space at the respective preset pressures.

Description

technical field [0001] The present invention relates to an ink circulation type inkjet printing device [inkjet printer]. Background technique [0002] There is known an ink-jet printing apparatus of an ink circulation type. In an ink circulation type inkjet printing device, ink is circulated and ink is ejected from an inkjet head to perform printing. [0003] The following Patent Document 1 discloses an inkjet printing apparatus that uses an air pump to increase the pressure in a pressurization tank provided upstream of an inkjet head on an ink circulation path and to lower the negative pressure provided downstream The pressure in the tank [pressurization tank], the ink is circulated through the pressure difference. [0004] In this type of inkjet printing apparatus, at the start of ink circulation, air is supplied from the negative pressure tank to the pressurized tank by driving the air pump, thereby creating settings for ink circulation in the pressurized tank and the n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/175B41J2/01B41J2/18
CPCB41J2/01B41J2/175B41J2/17556B41J2/17596B41J2/18B41J2/14201B41J2202/02
Inventor 杉谷宽
Owner RISO KAGAKU CORP
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