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US 4,550,327 AGranted
Device for discharging liquid droplets
AssigneeCanon Kabushiki Kaisha
InventorAkira Miyakawa
Life of this patent
Estimating the term…
Abstract
A device for discharging droplets liquid within nozzles as liquid droplets by utilizing thermal energy comprises said nozzles each provided therein or thereby with a conductive element to detect the state of liquid in the nozzle by measuring the change of electric current passing the conductive element.
Claims6
A device for discharging liquid as liquid droplets, comprising:
- at least one nozzle for providing a liquid flow path;
- heating means for applying thermal energy to an area of said nozzle;
- and
- means for detecting the absence of liquid in said area, including a conductive element having an electrical conductivity that varies according to the temperature of said conductive element, said conductive element being disposed proximate to said area for detecting changes in the temperature thereof in accordance with changes in the electric current passing through said conductive element.
1 more element
Dependencies are inferred from the claim text.