| Patent Number |
Title Of Patent |
Date Issued |
| 4306014 |
Photo-sensitive and heat-sensitive composition and recording element using same |
December 15, 1981 |
| A photo-sensitive and heat-sensitive composition consisting essentially of a leuco-pigment; a hydrogen donator; a photo-reductant which, when exposed to a visible light, produces a reducing agent by the action of said hydrogen donator coexisting therewith; a photooxidant which, when expo |
| 4305040 |
Phase detection system |
December 8, 1981 |
| A phase detection system in which a triangular reference signal which is substantially similar in waveform, frequency and amplitude to an input signal is used and at a time of detection whether the reference and input signal are rising or falling is detected and also whether or not the i |
| 4304831 |
Black-color forming two-component type diazo copying material |
December 8, 1981 |
| A two-component type diazo copying material according to this invention, which comprises a support and a photosensitive layer formed thereon, said layer consisting essentially of a diazo compound expressed by the following general formula I and a coupler mixture consisting of a compound |
| 4301585 |
Method of forming plate having fine bores |
November 24, 1981 |
| A method of forming a plate having a plurality of uniform and precisely sized fine bores. The method comprises winding around a mold member a wire having a diameter equal to that of the fine bores to be formed, forming an electro-cast layer on the mold member, superposing and uniting ano |
| 4301224 |
Electrophotographic element with a combination of binder resins |
November 17, 1981 |
| An electrophotographic element comprising, in successive layers; a conductive substrate, a charge generation layer and a charge transport layer, the charge generation layer being formed by the steps of; adding to a dispersion comprising a photoconductive organic pigment, a solvent and a |
| 4300144 |
Multiple-nozzle ink-jet recording apparatus |
November 10, 1981 |
| In the pressure, on-demand type ink-jet printers or the like, the driving voltages applied to respective electrostrictive means of print head or nozzle units are shifted in time so that constructive interferences of sound waves produced by the pressure waves which in turn are generated b |
| 4299896 |
Electrophotographic sensitive materials containing a disazo pigment |
November 10, 1981 |
| The present invention provides electrophotographic sensitive materials having a high sensitivity as well as a high flexibility which comprise a conductive support and a photosensitive layer formed thereon, said photosensitive layer containing one disazo pigment, as an effective ingre |
| 4297426 |
Electrophotographic element with carbazole hydrazone or anile charge transport compounds |
October 27, 1981 |
| An electrophotographic element comprising a conductive substrate and a mono-layer type or multi-layer type photosensitive layer, superposed thereon, containing a photoconductive material in which said photoconductive material is a hydrazone compound having the following general formu |
| 4296190 |
Photosensitive material for use in electrophotography with a radiation cured binder resin |
October 20, 1981 |
| The present invention provides a photosensitive material for use in electrophotography which is superior in durability, resistance to solvents and light sensitivity, which comprises a photoconductive layer consisting essentially of an inorganic or organic photoconductor and an ionizing |
| 4296171 |
Transfer sheet suitable for electrophotographic pressure-fixing |
October 20, 1981 |
| A transfer sheet suitable for electrophotographic pressure fixing, which comprises a paper support and a thin layer of resin formed by coating, thereon as transfer-acceptable layer said resin being obtained by neutralizing carboxyl radical of a copolymer comprising methyl methacrylat |
| 4293867 |
Device for removing air bubbles formed and trapped in ink chamber of print head of ink-jet print |
October 6, 1981 |
| A device for removing air bubbles formed and trapped in an ink chamber of an ink-jet print head, said device comprising a means for sensing the existance of air bubbles in the ink chamber, a means responsive to the output signal from the sensing means for replacing the ink in the ink |
| 4293866 |
Recording apparatus |
October 6, 1981 |
| A recording apparatus wherein a liquid drop generator issues liquid drops which are steered to a strike at desired spots on an intermediate means so as to form a printing image to be transferred onto a recording sheet brought into contact therewith. The intermediate means includes a dye |
| 4293865 |
Ink-jet recording apparatus |
October 6, 1981 |
| A voltage is applied to a plurality of electromechanical transducers mounted on a plurality of nozzles, respectively, so that a meniscus may be formed at the nozzle tip. One or more opposing electrodes or rear transducers are disposed in opposed relationship with a predetermined numb |
| 4293628 |
Electrophotographic elements containing disazo compounds |
October 6, 1981 |
| The present invention provides disazo compounds expressed by the general formula ##STR1## [wherein A represents ##STR2## (wherein R represents alkyl radical, alkoxy radical, nitro radical, dialkylamino radical or halogen, n is 0 or an integer ranging from 1 to 3, and R ma |
| 4293492 |
Disazo compounds derived from 3,6-bis(styryl)-9-ethylcarbazole |
October 6, 1981 |
| The present invention provides disazo compounds expressed by the general formula: ##STR1## [wherein A represents a member selected from the group consisting of ##STR2## (wherein X represents a member selected from the group consisting of aromatic rings such as benzene ring, n |
| 4291643 |
Developing apparatus in a magnification-variable copier |
September 29, 1981 |
| An apparatus for the development of an electrostatic latent image in a magnification-variable copier which is capable of preventing the development of black frames on the outer circumference of copying portion when the reproduction is to be performed on a reduced scale. For this purp |
| 4291316 |
System for driving ink drop generator of ink-jet printer |
September 22, 1981 |
| In one embodiment of the present invention an ink manifold is divided into a first ink chamber communicated with an ink drop issuing nozzle and a second ink chamber communicated with an ink source and the first ink chamber through a narrow passage. First and second piezoelectric elements |
| 4290857 |
Method of forming fine bore |
September 22, 1981 |
| A method of forming a fine bore having the steps of effecting electro-forming on a core wire to form an electro-cast rod, slicing the electro-cast rod by forming chips each having the core wire and removing the core wire to thereby form in each chip a fine bore of a diameter coincidi |
| 4290073 |
Ink-jet recording apparatus |
September 15, 1981 |
| An ink-jet recording apparatus wherein the ink jet is issued from an ink head or manifold and broken into drops. The selected ink drop is charged and made to pass through a first deflection means which deflects the charged ink drop in two mutually perpendicular directions, one being in |
| 4288874 |
Timing data reproduction system |
September 8, 1981 |
| A system for generating from the incoming digital data signal the timing data required for sampling the data signal. A shift register is provided to phase the sampling clock with the incoming digital signal and generate a phase difference signal which is applied to a variable-frequency o |
| 4288797 |
Variable-charge type ink-jet printer |
September 8, 1981 |
| An ink-jet printer wherein a pair of horizontal deflection electrodes and a pair of vertical deflection electrodes are disposed in the order named in the direction of travel of ink drops so that the charged ink drops may be deflected in the horizontal direction depending upon the charge |
| 4285508 |
Collator |
August 25, 1981 |
| A collator being adapted to receive and carry copy sheets from a copying machine and distribute the copy sheets to a plurality of bins arranged in series for storing the copy sheets. The collator is provided with a copy sheet feeding table and a copy sheet feeding mechanism for sending, |
| 4284993 |
Multi-nozzle head for ink jet printer with ink supply pipe in ink chamber |
August 18, 1981 |
| An ink jet head comprises a nozzle unit having a plurality of nozzles and a vibration unit having vibrating plates opposite to the nozzles. One or more ink distributing pipes having a plurality of ink outlets are arranged in parallel with the rectilinear nozzles, whereby the ink under un |
| 4284347 |
Aperture-controlling device in a variable-scale photocopying machine |
August 18, 1981 |
| In a variable-scale photocopying machine having a photosensitive medium, a light source, an optical system for projecting light from the source as an exposure light beam onto the medium, and a scale-varying mechanism, the width of the light beam is adjustable by an adjusting mechanism, w |
| 4282811 |
Method for desensitizing offset printing plates |
August 11, 1981 |
| A method for desensitizing an offset printing plate which comprises applying an aqueous desensitizing composition consisting essentially of at least one complex to a non-image area of the offset printing plate having an oleophilic image formed thereon in an amount effective to desensitiz |
| 4282811 |
Method for desensitizing offset printing plates |
August 11, 1981 |
| A method for desensitizing an offset printing plate which comprises applying an aqueous desensitizing composition consisting essentially of at least one complex to a non-image area of the offset printing plate having an oleophilic image formed thereon in an amount effective to desensitiz |
| 4278343 |
Inversion developing method for electrophotography and relevant apparatuses |
July 14, 1981 |
| The present invention provides a developing method for electrophotography which is developed to perform the development by electrically insulating the developing electrode from the support of the photosensitive material, together with apparatuses suitable for practicing said method. This |
| 4274111 |
Color facsimile signal transmission system |
June 16, 1981 |
| At the transmitting side, a composite signal is synthesized from a color signal of a higher level and a black-and-white signal of a lower level, the composite binary signal is converted into a three-value signal, and this three-value signal is modulated and transmitted. At the receiving |
| 4272771 |
Ink jet printer with multiple nozzle print head and interlacing or dither means |
June 9, 1981 |
| When a multiple-ink-jet printer or plotter prints one array of ink dots by one printing cycle or scan, the spacing between the lowermost row or the leftmost column of one array of ink dots printed previously and the uppermost row or the rightmost column of the adjacent array of ink dots |
| 4272598 |
Electrophotographic material containing disazo compounds |
June 9, 1981 |
| The present invention provides disazo compounds expressed by the general formula I ##STR1## [wherein A represents ##STR2## (wherein R represents alkyl radical, alkoxy radical, nitro radical, dialkylamino radical or halogen, n is 0 or an integer of 1, 2 or 3, and R may be |
| 4271436 |
Digital copying machine |
June 2, 1981 |
| A digital copying machine is provided with a scanner system, a data processing and transferring system, a plotter system, and a control system for controlling these system. The data processing and transferring system comprises means for converting the output of a density correcting contr |
| 4271366 |
Analog signal delay circuit |
June 2, 1981 |
| An analog delay circuit wherein an analog signal to be delayed as well as a reference voltage signal the voltage level of which is previously known are applied to an analog delay element comprising BBD, CCD or the like, and the reference signal is derived from the output of the analog de |
| 4264699 |
Liquid developer for use in electrophotography |
April 28, 1981 |
| A liquid developer for use in electrophotography which is prepared by dispersing a pigment or dye and a resin in a carrier liquid comprising a nonaqueous solvent having a high insulating property and a low dielectric constant, wherein said resin comprises those obtained by grafting, upon |
| 4264695 |
Electrophotographic photosensitive material with electron donors and electron acceptors |
April 28, 1981 |
| A photosensitive material for use in electrophotography which comprises a conductive support, a first layer consisting essentially of a substance capable of generating a conductive carrier through light absorption and an electron donor or an electron acceptor, and a second layer consisti |
| 4264185 |
Two color electrostatographic apparatus |
April 28, 1981 |
| An imaging unit forms a bipolar electrostatic image of a two color original document on a photoconductive drum (12). A first developing unit (13) applies a toner (16) of a first color and polarity to the drum (12) and a second developing unit (14) applies a toner (17) of a second color a |
| 4264130 |
Self-focusing fiber array |
April 28, 1981 |
| A self-focusing fiber array comprises three rows of self-focusing fibers, which are most closely packed and each of the self-focusing fibers substantially satisfies an equation of ##EQU1## where n.sub.o is the refractive index at the center of the cross section of each of the sel |
| 4264067 |
Duplexing auto document feed for copying machine |
April 28, 1981 |
| A conveyor belt (14) conveys a document (19), (32) over a transparent glass platen (10) to a scanning position. An automatic document feed unit (22), (26) feeds documents (19) from a stack one by one between the lower run of the belt (14) and the platen (10) for conveyance over the plate |
| 4247944 |
V.29 Constellation detection method and apparatus |
January 27, 1981 |
| V.29 constellation detection method and apparatus including a quadrant transformer for Processing the quantized real and imaginary component signals corresponding to a particular transmitted signal from a known set of transmitted signals by effectively rotating such components into first |
| 4247614 |
Electrophotographic element containing a disazo pigment |
January 27, 1981 |
| The present invention provides an electrophotographic element which comprises some disazo pigment expressed by the general formula ##STR1## [wherein R.sub.1 represents a member selected from the group consisting of hydrogen atom, methyl radical, ethyl radical, methoxy radical, ethoxy |
| 4247595 |
Thermosensitive recording material |
January 27, 1981 |
| A thermosensitive recording material which is composed of a support and a thermosensitive layer formed thereon, said thermosensitive layer comprising a chromogenic substance, a developing substance and an inorganic filler consisting essentially of hexagonal system thin plate type kao |
| 4247195 |
Bias device for a copying machine |
January 27, 1981 |
| In a bias device for a copying machine, the surface potential of the photo-sensitive member is detected and stored, a bias voltage is obtained by superposing a certain potential on the potential thus stored, the surface potential of an electrode confronting the photo-sensitive member |
| 4247194 |
Control system for electrophotographic copying machine |
January 27, 1981 |
| A control system for electrophotographic copying machines which may forcibly return the component parts which are reciprocated and rotated during the copying operations to their home positions after a power switch is turned on, may detect malfunctions after the copying operations are |
| 4247193 |
Electrostatic copying machine comprising jam sensors |
January 27, 1981 |
| A plurality of feed units feed a copy sheet (13) down a sheet feed path (41) along which various operating units (18), (37) are disposed. The operating units (18), (37) function to transfer and fix a toner image to the copy sheet (13). Sensors (42), (43), (44), (46), (47) sense for the |
| 4245224 |
Drive circuit for ink jet discharging head |
January 13, 1981 |
| A drive circuit for an ink-on-demand type ink jet discharging head used for generating characters and patterns with the jet of ink. A driving pulse delivery circuit is conneted to the ink jet discharging head for delivering it with the driving pulses for causing it to discharge the jet |
| 4245021 |
Electrophotographic element having charge transport layer |
January 13, 1981 |
| An electrophotographic element according to the present invention exhibits an exceedingly high sensitivity and it comprises (1) an electroconductive support, a charge producing layer consisting essentially of a charge producing substance and a charge transport layer consisting essentiall |
| 4231047 |
Ink-jet printing method and device therefor |
October 28, 1980 |
| A first ultrasonic transducer is normally energized so that the ink jet normally emerging through a nozzle of an ink manifold containing the pressurized ink may break into an ink drop within a charge electrode and the charged ink drop may be deflected by a pair of deflection electrodes |
| 4209327 |
Electrophotographic sensitive element with benzylamino carbazole charge transfer material |
June 24, 1980 |
| The present invention provides an electrophotographic sensitive element which comprises an electroconductive support and a photosensitive layer formed thereon and containing some charge-carrier generating pigment and a specific charge transfer substance. Said specific charge transfer |
| 4192677 |
1,3,4-Oxadiazole derivatives and use thereof |
March 11, 1980 |
| 1,3,4-oxadiazole derivative expressed by the general formula ##STR1## wherein R represents alkyl having 1-4 carbon atoms, dialkylamino having 1-4 carbon atoms, diarylamino, phenyl, styryl, halogenophenyl, nitrophenyl, alkylphenyl having 1-4 carbon atoms, alkoxyphenyl having 1-4 c |
| 4191568 |
Photosensitive material for electrophotography with dye containing overlayer |
March 4, 1980 |
| A photosensitive material for use in electrophotography is disclosed which comprises a conductive support, a photoconductive layer superposed on said support and a protective layer superposed on said photoconductive layer, said surface protective layer containing an organic compound whic |
| 4181912 |
Electrostatic recording apparatus comprising improved electrode switching means |
January 1, 1980 |
| Groups of recording electrodes are alternatingly connected to two sets of data bus lines. A high voltage for electrostatic recording on a sheet of paper is applied from a power source to inputs of data switches which are connected to the respective bus lines. Power switches are provided |
