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Inkjet Insights

Example publications  

Journal Title : NIP & Digital Fabrication Conference

Publisher Name : Society of Imaging Science and Technology

Multiple greyscale drop ligaments.jpg

Nozzle Plate Observations during Printing:

Pooling and its Impact on Reliability

Mario Massucci, Nick Jackson, Tri Tuladhar, Paul Drury

Abstract

Many factors control the reliability of a print head during use. Apart from altering the jetting condition like drop velocity and frequency, reliability can be controlled during the development of the waveform for the ink/print head combination. It may also be modified through careful control of the components and the physical properties of ink. Typically drops are observed in flight while waveform is developed to produce drops of the desired characteristics. Through close observation of the nozzle plate during this process it was noted how the non-firing neighbours of printing channels were prone to pool under certain conditions while pooling around the jetting channel would have been expected. Adjustment to waveforms to reduce the degree of pooling was found to improve printhead reliability. Work did not concentrate solely on waveform development. Improvement to jetting and reliability was also found through fine tuning the composition of the ink. Similarly, conditioning the nozzle plate was found to slow the onset of pooling. This may offer an alternative approach to improving print reliability through ink or waveform modification since wiping the nozzle plate may be included as part of the maintenance routine.

Three-fold Increase in Inkjet Speed of Piezoelectric

Shared Wall Technology Exploiting Single Cycle Operation

Mario Massucci, Julian Bane, Alison Morris, Tri Tuladhar, Paul Drury

Abstract

In any inkjet system, the ink goes through various physical and geometric constraints which influence the flow dynamics and finally the jetting characteristics. The dynamic flow behaviour in-channel, through the nozzle and in flight during printing is vital to control print quality (drop ejection characteristic, reliability) and further advances in the capability of inkjet technology.This paper will discuss the flow behaviour at each stage of a drop-on-demand printhead. The fluid dynamics of the ink on the millimetre scale within the printhead inlet is very different to that on the micron scale within the channel and nozzle. Although they are all in the laminar flow regime they are subject to very different shear rates. In a printhead, various system components (ink, heaters, pumps, actuator and nozzle) must be designed or configured to achieve target velocity, frequency, drop size, and reliability. Both simulation and experimental results on these topics will be discussed in this paper.

Technology
Parallel Lines

From Ink Bottle to Ink Drop

The Flow Environment in an Inkjet Printhead

Mario Massucci, Peter Boltryk, Tri Tuladhar, Paul Drury

Abstract

In any inkjet system, the ink goes through various physical and geometric constraints which influence the flow dynamics and finally the jetting characteristics. The dynamic flow behaviour in-channel, through the nozzle and in flight during printing is vital to control print quality (drop ejection characteristic, reliability) and further advances in the capability of inkjet technology.This paper will discuss the flow behaviour at each stage of a drop-on-demand printhead. The fluid dynamics of the ink on the millimetre scale within the printhead inlet is very different to that on the micron scale within the channel and nozzle. Although they are all in the laminar flow regime they are subject to very different shear rates. In a printhead, various system components (ink, heaters, pumps, actuator and nozzle) must be designed or configured to achieve target velocity, frequency, drop size, and reliability. Both simulation and experimental results on these topics will be discussed in this paper.

Named Inventor 

Patents in the fields of inkjet devices, their fabrication, operation and peripheral systems

Inkjet Insights

Patent ID

US-9415582-B2

EP-1919711-B1

EP-2343187-B1

EP-1899164-B1

US-8570604-B2

JP-2010030314-A

BR-PI0513728-A

CA-2614872-A1

WO-2014023981-A1

GB-2503943-A

CA-2743387-A1

WO-2007026174-A3

WO-2012017248-A1

WO-2006059095-A1

WO-2006129071-A2

DE-602005008015-D1

GB-2515001-A

AU-2006253928-A1

AU-2006217652-A1

ES-2390585-T3

EP-1646503-B1

EP-1766675-A1

EP-1809480-A2

WO-2006003433-A1

WO-2006037995-A2

EP-1128962-B1

EP-1123211-B1

US-6820966-B1

AU-2002304417-A1

AU-2001287943-A1

TW-200711519-A

AU-2003208434-A1

EP-1476308-A2

CA-2344931-A1

EP-1395434-A1

CA-2509916-A1

DE-69905062-D1

Title

Droplet deposition apparatus 

Method of printing 

Droplet deposition apparatus 

Droplet deposition method and apparatus 

Printer and method for printing of overlapping swathes 

Droplet deposition apparatus 

inkjet printer manufacturing method 

Droplet deposition apparatus 

Droplet deposition apparatus and method for depositing droplets of fluid 

Droplet deposition apparatus with multiple printheads and controllers. 

Method and apparatus for droplet deposition 

Method of printing 

Droplet deposition apparatus and method for manufacturing the same 

Droplet deposition 

Droplet deposition apparatus 

Method for forming tracks and track arrangements 

A printhead actuator circuit 

Passivation of printhead assemblies and components therefor 

Droplet deposition apparatus 

Procedure and apparatus for droplet deposition 

Method of manufacturing a component for droplet deposition apparatus 

Method of manufacture of electronic or functional devices 

Droplet deposition apparatus 

Droplet deposition apparatus and method of manufacture 

Droplet deposition apparatus 

Droplet deposition apparatus 

Ink supply system 

Droplet deposition apparatus 

Nozzle plate for droplet deposition apparatus 

Droplet deposition apparatus 

Device and method of forming a device 

Actuation device and use thereof in fluid pumping and droplet deposition 

Fluid pumping and droplet deposition apparatus 

Droplet deposition apparatus 

Nozzle plate for droplet deposition apparatus 

Droplet deposition apparatus 

Ink supply filter

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Phone

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