Multichannel-printhead or dosing head
AssigneeBurkhard Buestgens
InventorsBurkhard Buestgens, Suheel Roland Georges
Life of this patent
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Abstract
A Printhead, particularly suitable for viscous or particle-filled fluids, with multiple channels is proposed. A channel of the printhead is characterized by a micro-electro-pneumatic circuit 2 containing a series circuit between a first and second pressure level out of a micro-valve 18 and a pneumatic throttle 23, for generating a control pressure pc at the common pneumatic node 5 of micro-valve 18 and pneumatic throttle 23, further a drop-on-demand fluid ejector 4 with a diaphragm 8 actuated by the control pressure pc, the fluid ejector 4 controlling the fluid discharge through fluid outlet 6.
Claims10
Multichannel printhead, at least of channel of the printhead comprising:
- a micro-electro-pneumatic circuit 2 providing a control pressure pc at a pneumatic node 5, the micro-electro-pneumatic circuit 2 comprising a microvalve element V1 being connected to a first pressure level and to pneumatic node 5 and a microvalve element V2 or throttle 23 being connected to pneumatic node 5 and to a second pressure level, a drop-on-demand fluid discharging element discharging an amount of fluid through at least one fluid outlet 6, whereby actuation of the fluid discharging element 4 is controlled by the control pressure pc.
Dependencies are inferred from the claim text.