Unlock instant, AI-driven research and patent intelligence for your innovation.

Ink jet record head

An inkjet recording and nozzle technology, applied in printing and other directions, can solve the problems of recording head residual bubbles, volume change, ink droplet discharge characteristics and adverse effects on image quality, and achieve the effect of reducing volume deviation and inhibiting ink heat storage

Inactive Publication Date: 2006-09-27
CANON KK
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, as an inherent problem of the ink discharge method, the volume of the flying ink droplet changes due to the heat generated by the electrothermal conversion element accumulating in the recording head, and the cavitation phenomenon caused by the collapse of the bubble adversely affects the electrothermal conversion element. , and air dissolved into the ink causes residual air bubbles to form inside the recording head, thereby adversely affecting ink droplet discharge characteristics and image quality, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ink jet record head
  • Ink jet record head
  • Ink jet record head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 7-1

[0129] Figure 9A with 9B In the shape of the nozzle, the discharge port 20 is formed from the first discharge port 16 and the second discharge port 17 from the side close to the discharge port 4, viewed from a direction perpendicular to the main surface of the element substrate 2. The cross-sectional area in the perspective plan view is formed larger in the second discharge port portion 17 than in the first discharge port portion 16 .

[0130] With such a shape, the flow resistance of the discharge port portion 20 can be reduced, and even if the discharged liquid droplets are reduced, the discharge speed will not decrease, and the printing quality can be improved. Here, the cross section perpendicular to the flow direction of the first discharge port portion 16 and the second discharge port portion 17 is not limited to a circle, and may be a circle, an ellipse, a polygon, and an approximately circular shape surrounded by curves.

Embodiment 7-2

[0132] Figure 10A with 10B The nozzle shape in is a modified example of (Example 7-1). In the shape of the nozzle shown in FIG. 10 , the first discharge port 16 is cylindrical, and the second discharge port 17 is truncated cone. By forming the second discharge port portion 17 into a truncated cone shape, flow resistance can be reduced compared to (Example 7-1). And, since the step portion 18 of the first discharge port portion 16 and the second discharge port portion 17 is reduced, the stagnation area of ​​the ink stagnated at the step portion 18 is reduced, the discharge amount and the discharge speed are stabilized, and the printing quality is improved. . The temperature of the ink stagnant at the step portion 18 is higher than that of the surrounding ink due to the heating of the electrothermal conversion element, so that the viscous resistance of the discharged ink changes, which adversely affects the discharge characteristics. Here, the cross-section perpendicular to...

Embodiment 7-3

[0134] Figure 11A with 11B In the nozzle shape shown, the first discharge port portion 16 and the second discharge port portion 17 are all cylindrical, which is the same as Figure 9A with 9BThe same combination as the embodiment, but in a plan perspective view viewed from a direction perpendicular to the main surface of the element substrate 2, the first discharge port portion 16 on the side opposite to the ink supply chamber 6 does not generate and the second row The exit portion 17 is formed in a stepped portion 18 . Therefore, compared with (Example 7-1), there is an effect of increasing the refill frequency by reducing ink clipping at the step portion 18 . Here, the cross-section perpendicular to the flow direction of the first discharge port 16 and the second discharge port 17 is not limited to a circle, and may be a circle, an ellipse, a polygon, and an approximately circular shape surrounded by curves.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Provided is an ink jet record head having a nozzle shape capable of, when further rendering liquid droplets smaller, reducing flow resistance in a discharge direction and preventing reduction in discharge speed of ink droplets.An opening face on a bubbling chamber 11 side of a second discharge port portion 10 is shaped so that a length in a direction parallel with an arrangement direction of discharge ports 4 is longer than the length in the direction vertical thereto, and the opening face on the discharge port portion side is also a sectional shape congruent with the opening face on the bubbling chamber 11 side. In the drawing, a cross section cut in a direction approximately parallel with the surface on which heaters 1 are formed of the second discharge port portion 10 is an approximately rectangular shape.

Description

technical field [0001] The present invention relates to a liquid discharge head for discharging liquid droplets such as ink droplets for recording on a recording medium, and more particularly to a liquid discharge head for performing inkjet recording. Background technique [0002] The inkjet recording method is one of so-called non-impact recording methods. In this inkjet recording method, the noise generated during recording is negligibly small, and high-speed recording is possible. In addition, the inkjet recording method can record on various recording media, and ink can be fixed on so-called plain paper without special treatment, and high-definition images can also be obtained. Due to such advantages, the inkjet recording method has been widely used not only in printers as computer peripherals but also in recent years as recording devices such as copiers, facsimile machines, and word processors. [0003] In the ink discharge method of the inkjet recording method genera...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/05B41J2/135B41J2/14
CPCB41J2/1404B41J2002/14169B41J2002/14185B41J2002/14387B41J2002/14403B41J2002/14475B41J2/135
Inventor 富泽惠二村上修一松本光弘
Owner CANON KK