1. An inkjet printhead, comprising:
an ink flow channel including a pressure chamber to contain ink;
a nozzle to communicate with the pressure chamber;
an actuator to provide a driving force to eject the ink from the pressure chamber; and
a plurality of electrodes which are disposed, facing the actuator, in the bottom of the pressure chamber away from the nozzle to form a non-uniform electric field according to applied voltages in the pressure chamber such that the electric field causes moving of bubbles contained in the pressure chamber out of the nozzle, wherein
the plurality of electrodes are disposed on walls forming the ink flow channel.
2. The inkjet printhead of claim 1, wherein the voltages are variable-frequency, traveling-pulse voltages.
3. A printhead, comprising:
a chamber layer comprising an ink chamber to contain ink;
a nozzle layer disposed on the chamber layer and comprising a nozzle in communication with the ink chamber to eject the ink from the ink chamber;
an actuator to provide a driving force to eject the ink from the ink chamber through the nozzle; and
a plurality of electrodes disposed, facing the actuator, in the bottom of the ink chamber away from the nozzle to move bubbles in the ink contained in the ink chamber out of the nozzle, wherein
the plurality of electrodes generates a non-uniform electric field in the ink chamber to dielectrically polarize the bubbles and applies a force to move the polarized bubbles towards the nozzle, wherein the plurality of electrodes is disposed on a wall of the ink chamber.
4. The printhead of claim 3, wherein the plurality of electrodes move the bubbles in the ink to the nozzle using dielectrophoresis.
5. The printhead of claim 3, wherein shapes of at least a portion of the plurality of electrodes are non-uniform shapes.
6. The printhead of claim 5, wherein the non-uniform shapes include at least one of a flat panel shape extending in a width direction of the ink chamber, and a flat panel shape including branches protruding in a length direction of the ink chamber.
7. The printhead of claim 3, further comprising:
a voltage applying unit to apply voltages to the plurality of electrodes.
8. The printhead of claim 7, wherein the voltage applying unit applies a first voltage to a portion of the plurality of electrodes disposed closer to the nozzle, and applies a second voltage to a portion of the plurality of electrodes disposed farther from the nozzle.
9. The printhead of claim 8, wherein the first voltage is lower than the second voltage.
10. The printhead of claim 7, wherein the voltages applied by the voltage applying unit are variable-frequency traveling pulse voltages to accelerate the movement of the bubbles towards the nozzle.
11. The printhead of claim 3, wherein the actuator is selected from a thermal actuator and a piezoelectric actuator.
12. The printhead of claim 3, wherein the chamber layer further comprises:
a manifold to supply ink to the ink chamber; and
a restrictor to restrict a back flow of ink from the ink chamber to the manifold
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A hair securing apparatus, comprising:
a piece of headwear having an open loop aperture being generally defined by a C-shape perimeter; and,
a removable hair securing means removably secured within said perimeter.
2. The apparatus of claim 1, wherein said headwear is a hat.
3. (canceled)
4. (canceled)
5. The apparatus of claim 1, wherein said hair securing means comprises a first portion of a hook-and-loop fastener assembly, said first portion removably securable to a second portion of said hook-and-loop fastener assembly, said second portion integrally formed or otherwise stitched to said aperture of said headwear along said C-shape perimeter.
6. The apparatus of claim 5, wherein said first portion is coupled to an elastic strap closing said open loop aperture, said elastic strap stretchable and twistable around a portion of hair for securing the portion of hair thereby forming a smaller closed loop around the portion of hair within said C-shape perimeter.
7. (canceled)
8. The apparatus of claim 1, wherein said hair securing means is selected from the group consisting of hook-and-loop fasteners, peg-and-slot assembliesstraps, snap-button assembliesstraps, rib-and-groove assembliesstraps, zipper assembliesstraps, ridge-and-channel assembliesstraps, elastic hair straps, elastic hair bands, hair loops, hair ties, bungee bands, scrunchies, scarves, head bands, hair slides, adjustable bands, and combinations thereof.
9. A hair securing apparatus, comprising:
a hat having an open-loop aperture; and,
a detachable closed-loop hair securing strap, said detachable hair securing strap removably secured to said open-loop aperture, thereby closing said open-loop aperture.
10. (canceled)
11. The apparatus of claim 10, wherein said detachable hair securing strap is removably secured to at least a portion of a C-shape perimeter defining said aperture.
12. The apparatus of claim 11, wherein said detachable closed-loop hair securing strap comprises a first C-shape fastening portion, said first fastening portion removably securable to a second C-shape fastening portion carried by said C-shape perimeter defining said aperture of said hat.
13. The apparatus of claim 12, wherein said first fastening portion is coupled to a flexible, stretchable and resilient strap, said strap stretchable and twistable around a portion of hair for securing the portion of hair, thereby securing the portion of hair within a second closed loop positioned within said closed loop.
14. The apparatus of claim 9, wherein said detachable hair securing strap is selected from the group consisting of hook-and-loop fasteners, peg-and-slot assembliesstraps, snap-button assembliesstraps, rib-and-groove assembliesstraps, zipper assembliesstraps, ridge-and-channel assembliesstraps, elastic hair straps, elastic hair bands, hair loops, hair ties, bungee bands, scrunchies, scarves, head bands, hair slides, adjustable bands, and combinations thereof.
15. A detachable hair securing apparatus adapted to be removably secured to a piece of headwear, said detachable hair securing apparatus comprising:
a first fastening portion, said first fastening portion removably securable to a second fastening portion, said second fastening portion positioned along a C-shape aperture on by the headwear; and,
a hair securing means, wherein said first fastening portion is coupled to a portion of an outer perimeter of said hair securing means.
16. (canceled)
17. The detachable hair securing apparatus of claim 15, wherein said hair securing means is stretchable and twistable around a portion of hair for securing the portion of hair, within a small loop formed within a larger loop secured within said C-shape aperture.
18. The apparatus of claim 15, wherein said first fastening portion is selected from the group consisting of hook-and-loop fasteners, peg-and-slot assembliesstraps, snap-button assembliesstraps, rib-and-groove assembliesstraps, zipper assembliesstraps, ridge-and-channel assembliesstraps, and combinations thereof.
19. The apparatus of claim 15, wherein said second fastening portion is selected from the group consisting of hook-and-loop fasteners, peg-and-slot assembliesstraps, snap-button assembliesstraps, rib-and-groove assembliesstraps, zipper assembliesstraps, ridge-and-channel assembliesstraps, and combinations thereof.
20. The apparatus of claim 15, wherein said hair securing means is selected from the group consisting of elastic hair straps, elastic hair bands, hair loops, hair ties, bungee bands, scrunchies, scarves, head bands, hair slides, adjustable bands, and combinations thereof.