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Dual droplet size print head

A print head, inkjet print head technology, applied in printing and other directions, can solve problems such as ink energy fluctuation and reducing the overall quality of printed images

Inactive Publication Date: 2005-03-16
LEXMARK INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, different heating element sizes in an inkjet printhead can cause unwanted fluctuations in the energy delivered to the ink
These energy fluctuations degrade the overall quality of the printed image

Method used

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  • Dual droplet size print head
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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0024] Shown in FIG. 1 is an inkjet printhead 1 having a nozzle plate 2 on which arrays of nozzles are arranged in a left column 6 and in a right column 8 . FIG. 2 shows an enlarged view of an array of nozzles in a nozzle plate 2 . The nozzle array includes first nozzles 10 and second nozzles 12 , wherein the positions of the first nozzles 10 and the second nozzles are arranged alternately in each of columns 6 and 8 . Each first nozzle 10 in the left column 6 is horizontally aligned with a second nozzle 12 in the right column 8, and each first nozzle 10 in the right column 8 is horizontally aligned with a second nozzle 12 in the left column 6 . In the preferred embodiment of the invention, the vertical spacing between adjacent nozzles in each column is 1 / 600 of an inch.

[0025] As shown in Figure 2, the first nozzle 10 has a diameter D 1 , which is larger than the diameter D of the second nozzle 12 2 . Hereinafter, the first nozzle 10 and the second nozzle 12 are also re...

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PUM

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Abstract

An ink jet print head has first nozzles (10) of a first diameter for ejecting droplets of ink having a first mass, and second nozzles (12) of a second diameter for ejecting droplets of ink having a second mass. The first diameter is larger than the second diameter, and the first mass is larger than the second mass. First and second heater-switch pairs are connected in parallel on a substrate of the print head. The first heater-switch pairs include first heaters adjacent corresponding first nozzles, and the second heater-switch pairs include second heaters adjacent corresponding second nozzles. The first (14) and second (16) heaters are composed of electrically resistive material occupying first and second heater areas on the substrate (4).

Description

technical field [0001] The present invention generally relates to an inkjet printhead for printing ink droplets of various sizes. More specifically, the present invention relates to an inkjet printhead for printing ink droplets of various sizes having a heating element and various size switching semiconductors. Background technique [0002] Due to the high print quality and reasonable price of inkjet printers, their market is expanding day by day. As the market demand for inkjet printers grows, it is also expected to improve image quality. One goal of inkjet printer design is to achieve the quality of continuous tone images such as photographs. One approach to achieving photo-quality images is to increase the number of grayscale levels an inkjet printer can produce. [0003] Inkjet printers form images on paper by ejecting ink droplets from nozzles in a printhead. Heating elements within the printhead heat the ink, creating air bubbles that force the ink out of the nozzl...

Claims

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Application Information

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IPC IPC(8): B41J2/05B41J2/14B41J2/205B41J2/21
CPCB41J2/04533B41J2/04541B41J2/0458B41J2/04593B41J2/14056B41J2/14072B41J2/2125B41J2002/14387B41J2/205
Inventor 弗兰克·E·安德森约翰·P·博兰什罗伯特·W·康奈尔乔治·K·帕里什
Owner LEXMARK INT INC
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