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| Number | Title | Issue Date |
| 4795917 | Low power high voltage driver circuit A circuit for driving an output between two voltage states in response to a control signal is disclosed. The circuit requires a very small amount of power in its quiescent state. The circuit comprises a first switch including first and second control term... | 01/03/1989 |
| 4791440 | Thermal drop-on-demand ink jet print head A thermal drop-on-demand ink jet print head in which an array of heating means is provided on one surface of a substrate member. A common electrode provides electrical contact to the heating means, and an array of data electrodes provides electrical conta... | 12/13/1988 |
| 4788563 | Recording apparatus A recording apparatus includes memories for storing full-color image information to be recorded, a recording head for recording an image on a recording medium, and a control unit including a CPU, a counter, a delay circuit, and a head driver. The control ... | 11/29/1988 |
| 4782350 | Amorphous silicon varactors as rf amplitude modulators and their application to acoustic ink printers Amorphous silicon (aSi) voltage-controlled, variable capacitors (varactors) are utilized as rf amplitude modulators, such as for amplitude modulating the rf applied to an acoustic ink printhead. Large area fabrication processes are employed for vertically... | 11/01/1988 |
| 4758849 | Hand-held ink jet with insertable cartridges A hand held device for spraying liquid utilizes insertable drop-on-demand ink jet cartridges. The disclosed device is simple and inexpensive in design and facilitates interchangeable use of different inks without intervening cleaning.... | 07/19/1988 |
| 4748460 | Self-contained non-contact writing device A self-contained non-contact writing device is disclosed that employs a thermal ink jet to transfer ink to a writing substrate. The problems associated with conventional direct contact writing devices are avoided by preventing direct contact of the ink tr... | 05/31/1988 |
| 4739415 | Image handling system capable of varying the size of a recorded image An image handling system with a variable magnification function can form a high-quality image at all times. The system sets a relative movement distance or speed between a recording head and a recording material and then determines a recording pixel area ... | 04/19/1988 |
| 4706098 | Printing device In a printing device including a recording electrode having a front end portion to which ink is supplied, and an opposite electrode arranged in opposed relation to the recording electrode, wherein the ink is electrostatically splashed toward the opposite ... | 11/10/1987 |
| 4700204 | Ink dot printer with selective energization of both electrodes A recording electrode and an opposed electrode are so positioned as to confront each other through a recording medium, and a recording signal is applied to the recording electrode while a signal reverse-biased with respect to the recording signal is appli... | 10/13/1987 |
| 4697193 | Method of operating an ink jet having high frequency stable operation A high performance ink jet is operated in a fill-before-fire mode. The ink jet is characterized by at least one resonant frequency in excess of 10 kHz creating an upper limit for a frequency of stable operation. During operation, the ink jet is characteri... | 09/29/1987 |
| 4651175 | Printer A multi-color printer prints a graph pattern in which, graph patterns printed in a hard-to-distinguish color are framed by a frame pattern of a different easy-to-distinguish color.... | 03/17/1987 |
| 4646106 | Method of operating an ink jet An ink jet includes a variable volume chamber with an ink droplet ejecting orifice. The volume of the chamber is varied by a transducer which expands and contracts in a direction having at least a component extending parallel with the axis ink droplet eje... | 02/24/1987 |
| 4639735 | Apparatus for driving liquid jet head An apparatus for driving a liquid jet head comprises: a piezoelectric element which mechanically deforms responsive to an electric signal; a pressure chamber whose volume varies due to the deformation of such element; a discharge port communicated with su... | 01/27/1987 |
| 4630076 | Ink-on-demand color ink jet system printer A color ink jet system printer of the ink-on-demand type includes four orifices for emitting yellow ink droplets, magenta ink droplets, cyan ink droplets and black ink droplets, and an additional orifice for emitting white or transparent ink droplets. The... | 12/16/1986 |
| 4625221 | Apparatus for ejecting droplets of ink An apparatus for ejecting droplets of ink including: a passage for ink; an orifice disposed at one end of the passage; a pressure-applying device for applying a pressure wave to the ink within the passage; and a signal-supplying device for supplying an ac... | 11/25/1986 |
| 4618869 | Facsimile print out system employing an ink jet system printer A facsimile print out system includes an ink jet system printer of the charge amplitude controlling type having a reciprocating printer head. A crystal oscillation circuit is provided for developing a base frequency signal. A first frequency divider recei... | 10/21/1986 |
| 4604631 | Control system and method for charge control ink jet printer A control system for a charge deflection type ink jet printer which prints out one character line of print data by a plurality of strokes on a paper is disclosed. Data associated with odd scanning lines are printed out by one printing stroke of a carriage... | 08/05/1986 |
| 4575730 | Ink jet printing randomizing droplet placement apparatus Ink jet printing apparatus is provided for vertically randomizing the flight paths of ink drops ejected from an ink jet printing head to print dots at positions randomly deviated vertically with respect to a line scanned by the printing head. Ejected ink ... | 03/11/1986 |
| 4562445 | Apparatus and method for driving ink jet printer A circuit and related method are provided for driving an ink jet printer to achieve a consistent velocity of ejected ink drop despite differences in the time elapsing between successive drops. Timing pulses timing the ejection of drops each trigger the pr... | 12/31/1985 |
| 4560998 | Low voltage transformer coupled ink jet driver The invention consists of a transformer coupled low voltage power amplifiers which provides the moderate voltage (200-500 Vp-p) excitation potentials required by PZT ink jet or similar device elements. Transformer coupling is viable in that ink... | 12/24/1985 |
| 4525726 | Interpolation dot control in an ink jet system printer An ink jet system printer of the charge amplitude controlling type includes a print control system for emitting printing ink droplets provided for forming a matrix pattern and interpolation ink droplets interposed among the printing ink droplets at a rati... | 06/25/1985 |
| 4502054 | Selective ink-jet printing device The device comprises a printing head (15) constituted by an insulating container (19) with a capillary nozzle (36). The electrically conductive ink is kept under circulation in the container via a feed tube (26, 23) and a return tube (27, 24) leading to a... | 02/26/1985 |
| 4468680 | Arrayed ink jet apparatus An elongated acoustic waveguide 20 couples a transducer 18 to an ink jet chamber 14 including an inlet port 26,65 and an outlet orifice 16 through which droplets of ink are ejected. In one embodiment, the waveguide 20 is directly coupled to ink within the... | 08/28/1984 |
| 4466005 | Air bubble removing system in a printer head of an ink jet system printer of the ink on demand type An air bubble removing system is provided in an ink jet system printer of the ink on demand type for removing air bubbles contained in a pressure chamber of a printer head of the ink jet system printer. The air bubble removing system applies a driving sig... | 08/14/1984 |
| 4429321 | Liquid jet recording device A liquid jet recording device comprises a plurality of heat actuating chamber portions communicating with ejecting orifices for ejecting a liquid to form flying droplets, an electrothermal transducer provided for each heat actuating chamber portion so as ... | 01/31/1984 |
| 4424518 | Column dot formation in an ink jet system printer of the charge amplitude controlling type An ink jet system printer of the charge amplitude controlling type prints a desired symbol in a dot matrix fashion on a recording paper. Dots for forming a column of the dot matrix are formed in an up and down manner in order to increase the distance prov... | 01/03/1984 |
| 4415911 | Recording apparatus When reversing the advancing direction of a carriage having a printing head, speed control for the carriage is forbidden to enable high-speed recording and smooth movement of the carriage.... | 11/15/1983 |
| 4398204 | Circuit for operating recording nozzles A circuit for operating recording nozzles in ink mosaic recorders, each nozzle having an associated ink channel cylindrically surrounded by a piezoelectric transducer having a diameter which expands upon the application of a voltage thereto having a polar... | 08/09/1983 |
| 4354195 | Ink jet recording apparatus An ink jet recording apparatus of a dot matrix type in which the amounts of charges given to ink droplets are controlled depending upon recording conditions. The apparatus comprises, in one embodiment, a central processing unit (CPU) capable of generating... | 10/12/1982 |
| 4350989 | Ink-jet printing apparatus An ink-jet printing apparatus having a plurality of nozzles for projecting ink droplets which are selectively deposited on a printing medium in accordance with an information signal so as to form a printed pattern, such ink-jet printing apparatus comprisi... | 09/21/1982 |
| 4322732 | Ink jet recording method An electrostatic type ink-jet recording method wherein ink drops issuing from a nozzle are never placed adjacent one another in the direction of the deflection. According to one embodiment of the present invention, when a number of n contiguous ink dots a... | 03/30/1982 |
| 4313123 | Controllable ink drop velocity type ink-jet printer Depending upon a position in a dot matrix where an ink drop is to be deposited, the velocity imparted to that ink drop is controlled. The ink drop is charged by a charge electrode impressed with a constant charging voltage and deflected by a pair of elect... | 01/26/1982 |
| 4313124 | Liquid jet recording process and liquid jet recording head A liquid jet recording process and liquid jet recording head are driven by heat energy generated by an electrothermal transducer. The operating conditions as to heating and others are disclosed and further desirable dimensions of the electrothermal transd... | 01/26/1982 |
| 4222060 | Ink jet printing apparatus An ink jet head (47) is moved relative to a recording surface (11). Print signals are applied to the ink jet head (47) from a computer or the like (22) causing the ink jet head (47) to eject ink onto the recording surface (11). The amount of ink ejected a... | 09/09/1980 |
| 4184168 | Ink-on-demand type ink jet head driving circuit A circuit for driving an ink-on-demand type ink jet head comprising a comparator for comparing the video signal with a reference signal and delivering a high-level output when the level of the video signal is higher than or equal to said reference voltage... | 01/15/1980 |
| 4112469 | Jet drop copying apparatus A jet drop copying apparatus has an array of printing nozzles supported for axial movement over a copy paper mounted upon a rotating drum. Simultaneously therewith an optical scanning system scans a document positioned flat on a planar support surface and... | 09/05/1978 |
| 4051538 | Ink jet copier An ink jet copier is provided with a document scanner which scans a document to be copied one line at a time producing non-coded binary data. The binary data is inserted in storage in a predetermined arrangement. Stored data is removed from selected prede... | 09/27/1977 |
| 4026401 | Circuitry for generating a plurality of independent ink print control signals Variable alpha/numeric data is printed by a plurality of ink jets and registered in aligned relationship with fixed data printed on a moving web in response to a first time dependent signal representative of the position of the alpha/numeric data. A plura... | 05/31/1977 |
| 3946399 | Charge compensation network for ink jet printer Provision is made for compensating for the effects of the aerodynamic forces and electrostatic forces on a charged ink drop in the vicinity of another charged ink drop or drops by altering the charge applied to the drops affected by these forces so that f... | 03/23/1976 |
