Pressure wave damper apparatus for continuous liquid printing
AssigneeE. I. Du Pont de Nemours and Company
InventorsJames Daniel Tremel, Nugent Truong, Matthew Stainer, Reid John Chesterfield
Life of this patent
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Abstract
A nozzle assembly with a nozzle body cooperating with a flexible portion, the nozzle assembly also contains a throttle plate, and this combination is used to mitigate pressure variations transmitted to the nozzle assembly. The combination results in a more uniform liquid deposition during continuous liquid printing.
Claims10
A nozzle assembly for a printing apparatus having a movable printing head, the nozzle assembly being adapted to deposit a liquid ink onto a surface as the printing head is displaced with respect to the surface, motion of the printing head acting to impose pressure variations within a liquid ink being supplied to the nozzle assembly, the nozzle assembly comprising:
- a nozzle body;
- a nozzle disc supported by the nozzle body at a predetermined position therein, the nozzle disc having a nozzle opening,
- a throttle plate mounted in the nozzle body at a location spaced from the nozzle disc, the throttle plate having a passage therein, the passage in the throttle plate being in fluid communication with the nozzle body, the throttle plate being operative to impart a throttling action on a flow of liquid ink passing into the nozzle body;
- the nozzle body having a flexible portion, the flexible portion being positioned between the nozzle disc and the throttle plate, the flexible portion being able to define an accumulation space within the nozzle body in response to a pressure variation in the ink,
- whereby, the throttling action by the throttle plate coupled with the definition of the accumulation space being operable to mitigate pressure variations in a liquid ink.
Dependencies are inferred from the claim text.