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US 5,963,233 AGranted
Jet recording method
AssigneeCanon Kabushiki Kaisha
InventorsKatsuhiro Shirota, Genji Inada
Life of this patent
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Abstract
In a jet recording method, a normally solid recording material is placed in a heat-melted state within a nozzle and heated to generate a bubble therewithin by applying a bubble-generating heat energy, thereby ejecting droplets of the recording material out of the nozzle onto a recording medium. In the method, the ejection of the recording material droplets can be stabilized by applying prior to the bubble-generating heat energy a preheating energy which decreases continuously or discontinuously.
Claims6
A jet recording method, comprising the steps of:
- placing a recording material in a liquid state within a plurality of nozzles;
- heating the recording material to generate a bubble within the recording material in each nozzle by application from a bubble-generating heater of bubble-generating heat energy corresponding to a given recording signal, thereby ejecting a droplet of the recording material out of the nozzle onto a recording medium;
- and
- applying to the recording material, a plurality of preheating pulses of equal height providing preheating energy from the bubble-generating heater, the preheating energy having an energy density per unit time which decreases with time until application of the bubble-generating heat energy, the decrease in the energy density per unit time corresponding to a decrease in pulse width or number of pulses per unit time of the preheating pulses,
- wherein the preheating energy is provided to the recording material so as not to cause a substantial change in volume of droplets ejected out of each nozzle but to stabilize a bubble-through mode jet recording such that each bubble generated in said bubble generating heating step is caused to communicate with ambience, thereby ejecting each droplet of the recording material in a substantially constant volume and along a substantially constant ejection path.
2 more elements
Dependencies are inferred from the claim text.