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Phase shifts for printing at two speeds

A technology of printing drops and nozzles, applied in printing devices, printing, etc., can solve the problems of not improving printing quality and achieve the effect of improving image quality

Inactive Publication Date: 2012-07-18
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although Brost '669 is effective in improving print quality at high speeds, it has been found not to improve print quality at all print speeds
Specifically, at low and medium printing speeds, printing disadvantages are still evident

Method used

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  • Phase shifts for printing at two speeds
  • Phase shifts for printing at two speeds
  • Phase shifts for printing at two speeds

Examples

Experimental program
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Embodiment Construction

[0029] This description will relate in particular to elements which form part of, or which cooperate more directly with, a device according to the invention. It is to be understood that elements not specifically shown or described may take any form well known to those skilled in the art. In the following description and drawings, the same reference numerals are used, where possible, to designate the same elements.

[0030] Example embodiments of the present invention are shown schematically and not to scale for the sake of clarity. One of ordinary skill in the art will readily be able to determine the specific dimensions and interconnections of the elements of the example embodiments of the invention.

[0031] As described herein, example embodiments of the present invention provide a printhead or printhead assembly typically used in inkjet printing systems. However, many other applications are emerging that use inkjet printheads to emit liquids (other than inks) that need t...

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PUM

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Abstract

The method includes forming first size drops by applying drop forming pulses during a unit time period to; forming second size drops by applying drop forming pulses during a second size drop time period, tm, which is a multiple, m, of the unit time period; forming the corresponding plurality of drop forming energy pulse sequences so as to form non-print drops and print drops; delaying the timing of the drop forming energy pulses sent to the transducers of the second group relative to the drop forming energy pulses sent to the transducers of the first group by a delay time tL, characterized by tL being equal to d*to where d is 1 1 / 2 to 9 1 / 2 , when printing at a first speed and tL is approximately equal to f* to times where f is 1 1 / 2 to 9 1 / 2 , f is greater than d when printing at a speed slower than the first speed.

Description

technical field [0001] The present invention relates generally to digitally controlled printing devices, and more particularly to continuous inkjet printheads having improved quality at "low speeds" by phase shifting adjacent nozzles. Background technique [0002] Ink-jet printing has been considered a strong contender in digitally controlled electronic printing due to its non-impact, low-noise characteristics, its use of plain paper, and its avoidance of toner transfer and fusing. Inkjet printing mechanisms can be classified by technology as either drop-on-demand or continuous inkjet. [0003] The first technique, "drop-on-demand" inkjet printing, provides ink droplets that impinge on the recording surface by using a (thermal, piezoelectric, etc.) pressurized actuator. Many commonly practiced drop-on-demand technologies use thermal actuation to eject ink drops from nozzles. A heater located at or next to the nozzle heats the ink sufficiently to boil to form a vapor bubble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J29/38
CPCB41J2002/022B41J2002/031B41J2/03B41J2002/033
Inventor 基姆·韦德·蒙茨托德·拉塞尔·格里芬大卫·路易斯·让马里罗伯特·林克
Owner EASTMAN KODAK CO