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Method for maintaining ink-jet printing head

An inkjet print head, print head technology, applied in printing and other directions, can solve the problems of aggravation, no solution, print head contamination sensitivity, etc.

Inactive Publication Date: 2006-07-19
HEWLETT PACKARD DEV CO LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A particular problem is that printheads are particularly sensitive to contamination, either from air or air bubbles that form during the life of the printhead, or from solid particles that either If the ink stays in the print head or enters the print head together with the ink, this problem will be aggravated after long-term use of the inkjet print head
Although attempts have been made to solve them by, for example, a filter in the printhead, as described in patent document EP0875385, such a filter only attempts to prevent problems if they occur, and does not provide a solution. Program

Method used

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  • Method for maintaining ink-jet printing head
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  • Method for maintaining ink-jet printing head

Examples

Experimental program
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Embodiment Construction

[0050] figure 1 A large format printer 10 is shown which includes a laterally movable printhead carriage closed by a cover 12 extending over a generally horizontally extending platen 14 upon which print media The top of the board is discharged into a catch basket. On the left side of the platen are four detachable ink containers 20, 22, 24, 26, which are connected to the four detachable ink containers on the movable carriage through a detachable flexible tube device which will be described later. Inkjet printheads provide ink.

[0051] exist figure 2 Shown in plan with the carriage cover 12 removed, it can be seen that the printhead carriage 30 is mounted on a pair of transversely extending sliders or guides 32, 34 which in turn are secured to the frame of the printer superior. Also affixed to the frame of the printer are a pair of tube guide support bridges 40, 42 from which the front and rear tube guides 44, 46 are suspended. The printhead carriage 30 has a pivotable p...

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PUM

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Abstract

A method for servicing an inkjet printhead without removing the printhead from a carriage of the printer, wherein a controlled pressure differential is generated across the nozzle plate of the printhead to cause the formation of a controlled puddle of ink on the outside of the nozzle plate. Ink is then fired into the puddle through the nozzles of the printhead. The puddle may then be drawn back into the printhead through the nozzles. Alternatively the puddle is generated, is maintained for a predetermined period of time and then is withdrawn into the printhead without ink being fired from the nozzles.

Description

technical field [0001] The present invention relates to a method of maintaining an inkjet printhead without removing the printhead from the carriage of the printer, in particular by utilizing a controlled puddle created on the outside of the printhead's nozzle plate to maintain the printhead Methods. Background technique [0002] The present invention relates to the field of inkjet printers of the thermal or piezoelectric type, which can include several different products, including copiers and facsimile machines, in addition to desktop-mounted, hand-held or floor-standing stand-alone printers. The invention is illustrated here using a floor-standing printer. Such printers have a printhead carriage that is mounted on the printer for reciprocating movement perpendicular to the direction of motion of paper or other media on which printing is made by the printer. The printer carriage of a color printer generally has two or several, usually four, thermal inkjet printing heads ...

Claims

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Application Information

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IPC IPC(8): B41J2/165B41J2/18B41J2/185
CPCB41J2/16526
Inventor C·泰勒X·吉罗尼斯A·穆西业X·布鲁克
Owner HEWLETT PACKARD DEV CO LP
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