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Continuous ink-jet printer and printing head assembly thereof

A technology of inkjet printers and print heads, applied in printing devices, printing, etc., can solve problems such as large transient current spikes

Active Publication Date: 2022-04-26
LINX PRINTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electrostatic discharge will generate large transient current spikes in the ground conductor from the printhead cover to ground

Method used

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  • Continuous ink-jet printer and printing head assembly thereof
  • Continuous ink-jet printer and printing head assembly thereof
  • Continuous ink-jet printer and printing head assembly thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0082] figure 1 An electrostatic deflection type continuous inkjet printer is shown. The printer forms a continuous jet of ink and has an electrode arrangement for charging and electrostatically deflecting the ink droplets in order to print the desired pattern. The main fluid and electrical components are housed within the printer body 1 . The operator communicates with the printer through the touch screen display 3 . The ink jets are formed within the printhead 5, which also includes electrode means for charging and deflecting the ink drops, and which is connected to the printer body 1 by a flexible connection 7 called a conduit or umbilical. Ink drops, deflected as necessary to produce the desired pattern, travel from the printhead 5 and strike the surface 9 of the object 11 being conveyed past the printhead 5 to print the desired pattern on the surface 9 of the object 11 . The printhead 5 and the umbilical cord 7 form a printhead assembly detachable from the printer body...

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PUM

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Abstract

A printhead cover (83) of an electrostatic deflection inkjet printer is made of a material having a surface resistivity of not more than 1012 ohms per square or a volume resistivity of not more than 109 ohms meters, and is electrically connected to ground wires (93, 97). This prevents charge accumulation on the cover (83). The resistance from the surface of the cover (83) to the position where the cover ground wire (93) is connected to the signal ground wire (97) or enters the umbilical cord (7) is at least 16000 times the resistance from the position to the ground. This prevents an electrostatic discharge to the cover (83) from damaging the electronic circuit. The high resistance ground connection for the cover (83) avoids the need for ground wire braid in the umbilical cord (7). The cover (83) may be molded from an antistatic or static dissipative material.

Description

technical field [0001] The present invention relates to electrostatic deflection continuous inkjet printers, such as industrial printers, adapted to print on a conveyor belt in an industrial filling, packaging or processing line on a series of objects conveyed past the printer. Typically, the object is a product such as a manufactured or packaged food product, and the printer is used to print product and batch information, "use by" dates, and the like. The invention also relates to a printhead assembly for such a printer. [0002] In the operation of an electrostatic deflection continuous inkjet printer, a continuous jet of ink droplets is formed at the printhead of the printer. The printhead includes an electrode arrangement to capture charge on some or all of the ink droplets and to generate an electrostatic field to deflect the charged ink droplets. The ink droplets are deflected in flight so that only some ink droplets are used for printing. Ink drops not required for p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/095B41J2/14B41J29/38
CPCB41J2/095B41J2/14072B41J29/38B41J2/08B41J2/02B41J2/41B41J2/085
Inventor S·J·库克
Owner LINX PRINTING TECH