Inkjet Insights
Example publications
Journal Title : NIP & Digital Fabrication Conference
Publisher Name : Society of Imaging Science and Technology
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.
From Ink Bottle to Ink Drop
The Flow Environment in an Inkjet Printhead
Mario Massucci, Peter Boltryk, Tri Tuladhar, Paul Drury
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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
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Patents in the fields of inkjet devices, their fabrication, operation and peripheral systems
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