Printer head assembly for an ink jet system printer of the charge amplitude controlling type
AssigneesNippon Telegraph & Telephone Public Corporation, Sharp Kabushiki Kaisha
InventorsKiyoshi Sugiyama, Masaharu Matsuba, Fusao Iwagami, Khoki Fukumoto
Life of this patent
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Abstract
A nozzle for issuing ink liquid, a vibrator for exciting the nozzle to emit ink droplets of a given frequency, and a charging electrode for charging the ink droplets in accordance with print information are arranged within a cylinder shaped housing. One end of the cylinder shaped housing is covered by a wall having an opening at the center thereof through which charged ink droplets are propelled. A fixing plate is attached to the other end of the cylinder shaped housing for tightly securing the nozzle, the vibrator and the charging electrode within the cylinder shaped housing.
Claims18
In combination with an ink jet system printer of the charge amplitude controlling type, said printer emitting ink droplets charged with print information from a printer head, said printer head being carried by a carriage travelling in the lateral direction, the charged ink droplets travelling toward a record receiving member and being selectively deflected in the vertical direction and in a dot matrix fashion when passing through a constant high-voltage deflection field established by a pair of deflection electrodes, thereby recording desired symbols on said record receiving member, said printer head comprising:
- housing means, having a longitudingal axis, for protectively enclosing various components of said ink jet system printer head within said housing means, said housing means having an end wall means covering a first end of said housing means and a peripheral wall means attached to said end wall means for protectively enclosing the various components of said ink jet system printer;
- an opening formed in said end wall means;
- nozzle means enclosed within the peripheral wall means of said housing means for emitting ink liquid therefrom, said ink liquid being emitted through said opening formed in said end wall means;
- vibrator means enclosed within the peripheral wall means of said housing means for exciting said nozzle means to form said ink droplets having a given frequency of emittance, said vibrator means being attached to said nozzle means;
- charging electrode means enclosed within the peripheral wall means of said housing means for charging said ink droplets emitted from said nozzle means in accordance with said print information, said ink droplets having a predetermined charge amplitude;
- guide slit means formed along the longitudinal axis of said housing means for providing access to said nozzle means, said vibrator means, and said charging electrode means to guide the installation of said nozzle means, said vibrator means and said charging electrode means along predetermined positions within said housing means;
- and
- plate means attached to a second end of said housing means for tightly compressing and holding said nozzle means, said vibrator means and said charging electrode means in secure contact with each other along said longitudinal axis of said housing means, said nozzle means, said vibrator means, and said charging electrode means being unattached to said peripheral wall means of said housing means and being spaced a certain distance therefrom to permit such compressing by said plate means.
A printer head for use with printing systems of the charge amplitude controlling type and connected to a source of supply of an ink liquid used in creating print information, comprising:
- nozzle means responsive to said supply of said ink liquid for emitting a stream of ink droplets therefrom;
- vibrator means connected to said nozzle means for
- vibrator means connected to said nozzle means for vibrating said nozzle means thereby creating said stream of ink droplets, said stream of ink droplets having a predetermined frequency of emittance;
- charging means disposed in front of said nozzle means for imposing an electrostatic charge on each of said ink droplets in the ink stream, said charge on each of said ink droplets being indicative of certain characteristics associated with said print information;
- housing means for protectively enclosing said vibrator means, said nozzle means, and said charging means within said housing means, said housing means having a first end, a second end, and a peripheral wall extending between said first and second end for protectively enclosing said vibrator means, said nozzle means, and said charging means, said first end comprising a wall means including an aperture means for passing ink droplets therethrough;
- guide slit means longitudinally arranged along the periphery of said housing means for providing access to said nozzle means, said vibrator means, and said charging means to guide installation of said nozzle means, said vibrator means, and said charging means along predetermined positions within said housing means;
- and
- plate means connected to the second end of said housing means for tightly compressing and holding said vibrator means, said nozzle means, and said charging means in secure contact with each other along the longitudinal axis of said housing means, said vibrator means, said nozzle means, and said charging means being unattached to said peripheral wall of said housing means and being spaced a certain distance therefrom.
Dependencies are inferred from the claim text.