| Patents for B41J 2 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed (138,049) |
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| 02/05/1991 | US4990934 Recording head having a heat dissipating electrically insulating layer disposed between recording and return electrodes |
| 02/05/1991 | US4990933 Color thermal printer |
| 02/05/1991 | US4990932 Ink droplet sensors for ink jet printers |
| 02/05/1991 | US4990771 Scanning optical apparatus having focus position detector |
| 02/05/1991 | US4989850 Signature machines |
| 02/05/1991 | US4989317 Method for making tab circuit electrical connector supporting multiple components thereon |
| 02/02/1991 | CA2020316A1 Dropout-free center point fill method for displaying characters |
| 02/02/1991 | CA2020311A1 Method for editing character bitmaps at small sizes |
| 01/31/1991 | DE4022493A1 Electrophoretic printer with electronic printing plate or roller - has mutually isolated electrodes on underside of print plate achieving short image formation times |
| 01/31/1991 | DE3932501C1 Releasable plug connection for printer - has needle with elliptical tip and bond with linear cut |
| 01/31/1991 | DE3925048A1 Checking ink-jet printer outlet nozzles for fouling - by printing onto thermal sensor outside print zone and measuring sensor plate resistance |
| 01/31/1991 | DE3924966A1 Print nozzle drive circuit for ink mosaic printer - has push=pull amplifier drive circuit producing bipolar drive pulses for piezo-elements without inductive components |
| 01/31/1991 | DE3924964A1 Ink drop flight speed adjustment in ink jet printer - with piezo-elements causing pressure variations in ink channel using laser-trimmed resistor in parallel with each piezo-element |
| 01/31/1991 | DE3924963A1 Controlling piezo elements in ink printer - applying transient polarisation voltage via microprocessor control and resistance network before applying bias voltage |
| 01/31/1991 | DE3924961A1 Circuit for driving piezo-element in ink printer - has drive circuits for each piezo-element, potential divider inputs, additional DC voltage preventing depolarisation |
| 01/31/1991 | DE3924960A1 Circuit for droplet ejection from liquid filled channel - applies pulse to piezo-element on channel to change cross=section in ink mosaic printer |
| 01/31/1991 | DE3924958A1 Control circuitry driving print nozzles in ink mosaic printer - uses timer-controlled switching via potential divider for pulse generation without large inductive components |
| 01/31/1991 | DE3924957A1 Control circuitry driving print nozzles in ink mosaic printer - uses timer-controlled switches for pulse generation without large inductive components |
| 01/31/1991 | DE3924956A1 Control circuitry driving print nozzles in ink mosaic printer - generates pulses without large inductive components using clock-controlled switching |
| 01/31/1991 | DE3924948A1 Control circuitry driving print nozzles in ink mosaic printer - has timer-controlled switches and coupling capacitor for pulse generation without large inductive components |
| 01/30/1991 | EP0410738A2 Image forming apparatus |
| 01/30/1991 | EP0410691A1 An ink jet head capping device |
| 01/30/1991 | EP0410656A1 Electrical make/break interconnect having high trace density |
| 01/30/1991 | EP0410486A1 Thermal head |
| 01/30/1991 | EP0410259A1 Thermal printing apparatus and tape supply cartridge therefor |
| 01/30/1991 | CN1048913A Electric drip jet generator and its adjusting method |
| 01/30/1991 | CN1048817A Supply circuit of ink jet printing device |
| 01/29/1991 | US4989163 Photo printer having a host computer assist function and method of controlling the same |
| 01/29/1991 | US4989019 Multi-beam scanning system compensated for banding |
| 01/29/1991 | US4989017 Thermal print head |
| 01/29/1991 | US4989016 Method and apparatus for time distributed use of ink-jets in a printer-plotter |
| 01/29/1991 | US4988223 Matrix printing head with pivotable armatures |
| 01/29/1991 | US4988222 Double print head |
| 01/29/1991 | CA1279692C Method and apparatus for thermal printer temperature control |
| 01/29/1991 | CA1279624C Registration system for an electrostatic printer/plotter |
| 01/29/1991 | CA1279524C Color thermal transfer recording system and ribbon |
| 01/26/1991 | CA2008181A1 Electrical make/break interconnect having high trace density |
| 01/24/1991 | WO1991000808A1 Continuous ink jet printer |
| 01/24/1991 | WO1991000807A1 Process and device for monitoring the ejection of droplets from the output nozzles of an ink printing head |
| 01/23/1991 | EP0409596A2 Ink jet recording apparatus |
| 01/23/1991 | EP0409558A1 Apparatus for use in an ink jet printer |
| 01/23/1991 | EP0409536A2 Wire printing head for a high resolution printer |
| 01/23/1991 | EP0409450A2 Character generator |
| 01/23/1991 | EP0409243A2 Recording apparatus and method |
| 01/23/1991 | EP0409224A1 Displacement magnifying mechanism, for example for a print element |
| 01/23/1991 | EP0409201A2 Thermal transfer recording method and recording apparatus utilizing the same |
| 01/23/1991 | EP0408978A1 On-demand type ink jet print head |
| 01/23/1991 | EP0408968A1 Pin printer head for a high definition dot matrix printer |
| 01/23/1991 | EP0408680A1 Fiber optic array |
| 01/23/1991 | CN1011358B Generating way of expanding literal |
| 01/22/1991 | USRE33525 Multicolor thermal printing |
| 01/22/1991 | US4987450 Electrophotographic printer comprising aligned plural light emitting devices |
| 01/22/1991 | US4987429 One-pump color imaging system and method |
| 01/22/1991 | US4987426 Laser irradiating apparatus and laser recording apparatus using the same |
| 01/22/1991 | US4986676 Printing head of the impact type |
| 01/22/1991 | US4986179 Print head for dot matrix printers |
| 01/17/1991 | DE3922616A1 Matrix printer circuit for operation of mechanical printing elements |
| 01/17/1991 | DE3922346A1 Illumination head for digital film or photo-drum exposure - uses fluorescent camp and liq. crystal shutter of flexible plastics foil |
| 01/17/1991 | DE3921652A1 Producing polymer coating on nozzle plate e.g. for ink jet printer - with oxygen plasma ion etching from uncoated side |
| 01/16/1991 | EP0408333A1 Jet printing ink and method |
| 01/16/1991 | EP0408316A1 Impact dot head for a printer |
| 01/16/1991 | EP0408306A2 Piezoelectric/electrostrictive actuator having at least one piezoelectric/electrostrictive film |
| 01/16/1991 | EP0408305A2 Piezoelectric/electrostrictive actuator |
| 01/16/1991 | EP0408241A2 Print head for a thermal ink jet printer |
| 01/16/1991 | EP0408158A2 Matrix print head |
| 01/16/1991 | EP0408122A2 Circuit for a matrix printer |
| 01/16/1991 | EP0408073A2 Thermal transfer recording apparatus and facsimile apparatus |
| 01/16/1991 | EP0408071A2 Reciprocating color printing system with specified positioning of printing heads relative to a printing sheet |
| 01/16/1991 | EP0407988A2 Scanning optical device with aberration compensation feature |
| 01/16/1991 | EP0407893A2 Resistor film and method for forming the same |
| 01/16/1991 | EP0407881A1 Improved element as a receptor for nonimpact printing |
| 01/16/1991 | EP0407570A1 Ultrasonic dye image fusing |
| 01/16/1991 | EP0407379A1 Character generator for a non-mechanical printer. |
| 01/16/1991 | EP0294474B1 Apparatus and method for indicating the extent of movement of a movable member of an electromagnetic device |
| 01/16/1991 | CN1011213B Typing head integrated with single-sheet armature |
| 01/15/1991 | US4985850 Converting input code data |
| 01/15/1991 | US4985716 Apparatus for generating ions using low signal voltage |
| 01/15/1991 | US4985715 Marker assembly for spray marking dot matrix characters and method of fabrication thereof |
| 01/15/1991 | US4985712 Thermal head |
| 01/15/1991 | US4985710 Buttable subunits for pagewidth "Roofshooter" printheads |
| 01/15/1991 | US4984917 Laminated platen bar for noise attenuation in matrix printers |
| 01/15/1991 | US4984911 Ink dot printer |
| 01/15/1991 | CA1278949C Thermal ink jet printhead assembly including common slotted ink feed through and method of manufacture |
| 01/10/1991 | WO1991000182A1 Wire dot printing head |
| 01/09/1991 | EP0407184A2 Parallel link mechanism |
| 01/09/1991 | EP0407153A2 Electrostatic printer |
| 01/09/1991 | EP0407144A2 Printer |
| 01/09/1991 | EP0407065A2 Method and apparatus for improving the uniformity of a led printhead |
| 01/09/1991 | EP0407054A1 Ultra-violet curable ink composition and methods for applying the same |
| 01/09/1991 | EP0406983A2 Ink supply tank for a wire dot matrix printer head |
| 01/09/1991 | EP0406982A2 Method of impregnating ink absorbing means |
| 01/09/1991 | EP0406956A1 A method of reproducing image information in vector form on to a raster pattern and apparatus for reproducing an image |
| 01/09/1991 | EP0406694A2 Printing device with quick-change printing plate |
| 01/09/1991 | EP0348422A4 Stream deflection jet body for liquid jet printers |
| 01/08/1991 | US4984229 Autofocus system |
| 01/08/1991 | US4984092 Halftone image gradation data converted to bit-train data with data retained after thresholding converted to pulse-train data |
| 01/08/1991 | US4984035 Monolithic light emitting diode array |
| 01/08/1991 | US4983994 Thermal transfer type printing device |
| 01/08/1991 | US4983993 Heat generating layer of halogen and hydrogen atoms in a carbon matrix |
| 01/08/1991 | US4983992 Printing head for resistive ribbon type printing apparatus |