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Liquid droplet ejection head and image forming apparatus having the same

一种液滴喷射、喷射液的技术，应用在着墨装置、印刷等方向，能够解决浪费使用液体等问题

Inactive Publication Date: 2009-07-01
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when pre-ejection is performed, liquid (waste liquid) is wastefully used without involving image formation

Method used

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  • Liquid droplet ejection head and image forming apparatus having the same
  • Liquid droplet ejection head and image forming apparatus having the same
  • Liquid droplet ejection head and image forming apparatus having the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0069] will use Figure 1 to 1 1 to explain an image forming apparatus in which the droplet ejection head according to the first exemplary embodiment of the present invention is employed.

[0070] (the whole frame)

[0071] Such as Figure 5 As shown in , an inkjet recording apparatus 10 as an embodiment of an image forming apparatus according to the present invention includes a sheet feeding unit 12 in which paper P is accommodated as a recording medium, for recording an image to the slave sheet feeding unit. 12 an image recording unit 14 of the paper P supplied, a transport device 16 for transporting the paper P to the image recording unit 14, and a sheet discharge unit for accommodating the paper P on which an image has been recorded by the image recording unit 14 18.

[0072] The image recording unit 14 has a droplet ejection head 20 . The droplet discharge head 20 includes a plurality of nozzles 42 formed therein (see figure 2 ) to spray the nozzle surface 96 of the...

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PUM

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Abstract

A liquid droplet ejection head comprises an ejector, a liquid viscosity-increase prevention structure and a liquid viscosity-increase prevention controller. The ejector includes a nozzle for ejecting a liquid droplet, a pressure chamber communicating with the nozzle through a communication path, and an actuator for applying pressure to a liquid in the pressure chamber. The liquid viscosity-increase prevention structure prevents an increase of viscosity of the liquid in the ejector. The liquid viscosity-increase prevention controller changes the operation frequency of the liquid viscosity-increase prevention structure between when the liquid droplet is ejected from the nozzle and when ejection of the liquid droplet is paused and no liquid droplet is being ejected from the nozzle.

Description

technical field [0001] The present invention relates to a droplet ejection head for ejecting liquid droplets and an image forming apparatus having the droplet ejection head. Background technique [0002] There is known an image forming apparatus for ejecting liquid droplets from a nozzle in a state where the liquid circulates in the ejector to prevent the viscosity of the liquid near the nozzle from increasing (Japanese Patent Application Laid-Open (JP-A) No. 9- 201960). [0003] In more detail, when liquid droplet ejection is suspended and liquid droplets are not ejected from the nozzles, the liquid also circulates in the same amount as that in the ejector when liquid droplets are ejected from the nozzles. According to this operation, the viscosity of the liquid near the nozzle can be prevented from increasing. [0004] In addition, there is an image forming apparatus in which liquid droplets are ejected (preliminary ejection) from nozzles at each predetermined time irres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/14B41J2/175B41J2/195
CPCB41J2/18B41J2202/12B41J2002/14419B41J2/16526B41J2/17596B41J2/17509B41J2/175B41J2/04596B41J2/04581B41J2/16585B41J2/14233B41J2/0459B41J2/04588
Inventor 浜崎聪信平潟进
Owner FUJIFILM BUSINESS INNOVATION CORP
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