Back to results
US 2003/0197761 A1Published application
Ink jet recording head and non-linear electrical element
AssigneeCanon Kabushiki Kaisha
InventorHideyuki Sugioka
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeCanon Kabushiki Kaisha
InventorHideyuki Sugioka
Estimating the term…
An ink jet recording head is provided with a base plate with an ink supply port being open as a through hole having laminated thereon a heat accumulation layer and further thereon, two metallic layers serving as metallic electrodes, and a PTC thermistor layer and an electrical barrier layer, which are arranged between them. The PTC thermistor layer is formed by the PTC thermistor having the positive resistance temperature coefficient that raises resistance abruptly beyond a predetermined temperature. With the structure thus arranged, it becomes possible to suppress unnecessary heating of heat generating means so as to prevent the heat generating means from becoming excessively high temperature. It is preferable to adjust the predetermined temperature to be slightly higher than the bubbling temperature of liquid, particularly to 250 to 490° C.
An ink jet recording head for discharging liquid by bubbling liquid with heat generating means, wherein
An ink jet recording head comprising:
A non-linear electrical element having non-linear resistive characteristic comprising:
A non-linear electrical element comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Resistive element: layer structure
Typewriters
Term end not estimated
1. Field of the Invention
The present invention relates to an ink jet printer. More particularly, the invention relates to an ink jet recording head used for the bubble jet printer that utilizes bubbling phenomenon, and the like, and to a non-linear electrical element as well.
2. Related Background Art
FIG. 1 is across-sectional view that schematically shows an ink jet recording head in accordance with a first embodiment of the present invention.
FIG. 2 is a plan view that shows the heater portion of the ink jet recording head represented in FIG. 1.
FIG. 3 is a graph that shows the temperature dependency of the resistance value of the resistive heat-generating element, which is used for the ink jet recording head represented in FIG. 1.
Next, with reference to the accompanying drawings, the description will be made of the embodiment in accordance with the present invention.
(First Embodiment)
FIGS. 1 and 2 are views that schematically illustrate an ink jet recording head in accordance with a first embodiment. FIG. 1 is a cross-sectional view. FIG. 2 is a plan view. FIGS. 1 and 2 illustrate one heater portion for bubbling use. The entire body of the ink jet recording head may be structured so as to arrange plural heater portions for bubbling use shown in FIGS. 1 and 2.