| Patent Number |
Title Of Patent |
Date Issued |
| 4181620 |
Liquid developer for use in electrophotography |
January 1, 1980 |
| A liquid developer for use in electrophotography, which is superior in storage stability and transferability, said developer comprising a resin A and a coloring agent dispersed in a carrier liquid having a high electric resistivity and a low dielectric constant, said coloring agent havin |
| 4179407 |
Catalyst bed for use in decomposition of ammonia gas |
December 18, 1979 |
| Catalyst bed for use in decomposition of ammonia gas, which comprises a mixture of catalysts for use in decomposition of ammonia gas and granules of catalytically inert substances. |
| 4172976 |
Heat roller fixing apparatus |
October 30, 1979 |
| Improved heat roller fixing apparatus comprising an inner cylinder having a heater therein, an outer cylinder, and a vacuum chamber which is formed between the inner cylinder and the outer cylinder and which contains a liquid heat transfer medium at low pressure is described. In particul |
| 4172722 |
Electrostatic copying method for forming multiple copies |
October 30, 1979 |
| This invention provides an electrostatic copying method for forming multiple copies by repeating the process of developing an electrostatic latent image formed on an electrophotographic insulating material with a dry developer comprising electroscopic powder and carrier particles and |
| 4168329 |
Auto-bias developing process and an electrophotographic copying machine |
September 18, 1979 |
| An auto-bias developing process for developing an electrostatic latent image formed on a photosensitive member which includes the step of storing a detected potential in order to apply a fixed bias potential to a developing electrode plate wherein the surface potential of a photosens |
| 4165393 |
Magnetic brush developing process for electrostatic images |
August 21, 1979 |
| A magnetic developing process for use in electrophotographic or electrostatic recording techniques employs a magnetic brush formed by a developer which comprises a powder mixture of a low resistance toner and a high resistance toner, at least one of which comprises a magnetic toner. |
| 4165190 |
Serial printing apparatus |
August 21, 1979 |
| Resilient tongues project from a central hub and carry two or more type members. The hub is rotated to a position in which the tongue carrying the desired type member is in a printing position facing a paper supporting platen. The hub is then shifted along the axis of the selected tongue |
| 4165172 |
Drum cleaning system for electrophotographic apparatus |
August 21, 1979 |
| A spongy roller is rotated so that the surface thereof is pressed against the surface of a photoconductive drum and moves in the opposite direction therefrom. A resilient blade is also pressed against the photoconductive drum downstream of the roller so as to define a trough therebetween |
| 4162484 |
Data collection system |
July 24, 1979 |
| A data collection system wherein a metering center or central metering station sequentially selects a large number of remote terminal equipment block selectors and through the selected selector sequentially selects a plurality of terminal equipments or meters each for each comsumer b |
| 4161644 |
Electrophotographic apparatus comprising improved thermal fixing means |
July 17, 1979 |
| An electric heater means thermally fixes a toner image to a copy sheet to produce a permanent electrostatic copy of an original document. The heater means is normally energized at partial power but is switched to full power by means of microswitches at the inlet and outlet of the heater |
| 4161404 |
Photosensitive material for use in electrophotography with a poly alkyl or benzyl glutamate |
July 17, 1979 |
| The present invention provides a photosensitive material for use in electrophotography which is prepared by forming a barrier layer containing a peptide polymer between a conductive support and a photosensitive layer. This photosensitive material impedes unnecessary charge infiltration |
| 4158195 |
Pulse transmission-reception system |
June 12, 1979 |
| A system wherein a train of a predetermined number of electrical pulses are generated whenever a predetermined quantity of electricity, gas or water is consumed. The pulses are transmitted to a remotely located data station or the like for remotely measuring the consumed quantity. The re |
| 4157914 |
Derivatives of 1,3,4-oxadiazole and electrophotographic elements containing same |
June 12, 1979 |
| 1,3,4-OXADIAZOLE DERIVATIVES EXPRESSED BY THE GENERAL FORMULA ##STR1## wherein R represents cyanophenyl, nitrophenyl, dialkylaminophenyl (wherein alkyl has 1-4 carbon atoms), julolidyl, N-alkylcarbazolyl (wherein alkyl has 1-4 carbon atoms) or ferrocenyl radical are photoconductive s |
| 4157913 |
Derivatives of 1,3,4-oxadiazole and electrophotographic elements containing same |
June 12, 1979 |
| 1,3,4-OXADIAZOLE DERIVATIVES EXPRESSED BY THE GENERAL FORMULA ##STR1## , wherein R represents cyanophenyl, nitrophenyl, dialkylaminophenyl (wherein alkyl has 1-4 carbon atoms), julolidyl, N-alkylcarbazolyl (wherein alkyl has 1-4 carbon atoms) or ferrocenyl radical, are photocondu |
| 4157873 |
Dot printing apparatus |
June 12, 1979 |
| A ferromagnetic core fixed to an end of a wire is electromagnetically attracted such that the core and wire are axially moved so that the free end of the wire strikes paper through a ribbon to print a dot. A leaf spring returns the core and wire to a standby position in which the core |
| 4156169 |
Servo control apparatus |
May 22, 1979 |
| A sensor array produces two sinusoidal position signals which vary in phase by 90.degree. in response to rotation of a servo motor shaft. These position signals are inverted and the position signals and their inversions are commutated to produce a velocity signal. A position error si |
| 4155762 |
Liquid developer for binary diazo copying materials |
May 22, 1979 |
| A liquid developer for use in developing binary diazo copying materials which consists essentially of an alkali metal salt of an aminoacid and/or an alkaline earth metal salt of an aminoacid. |
| 4155545 |
Sheet feed apparatus for electrostatic copying machine or the like |
May 22, 1979 |
| A clamp which spans a pair of endless chains grips the leading edge of a sheet to convey the same into engagement with a photoconductive drum of an electrostatic copying machine or the like. A primary feed roller is driven through one rotation to feed the top sheet from a stack into the |
| 4149269 |
Holographic reading apparatus with an area identification and density reference scan |
April 10, 1979 |
| A large number of closely spaced holograms are formed on a sheet, each hologram comprising an information portion and an identification portion. First scan means movably position the sheet relative to a reconstruction beam and a sensor means for reading a selected hologram. The sensor me |
| 4148638 |
Photoconductive sensitive material with a trinitro-11-indeno[1,2-b]quinoxaline-11-one |
April 10, 1979 |
| A photoconductive sensitive material composed of a conductive support and a layer consisting essentially of charge-generating pigment, trinitro-11H-indeno[1,2-b]quinoxaline-11-one and binder resin formed on said support, and a photoconductive sensitive material composed of a conducti |
| 4148637 |
Silane coupling agent in protective layer of photoconductive element |
April 10, 1979 |
| The present invention provides a photosensitive material for use in electrophotography which comprises a conductive support having a photoconductive layer coated with a protective layer, the material being superior in light-decay property, mechanical strength and image formability, w |
| 4135928 |
Electrophotographic light-sensitive member |
January 23, 1979 |
| Electrophotographic light-sensitive member carrying a layer on an electroconductive support, said layer comprising a charge generating substance, a binder and 7-nitro-2-aza-9-fluorenylidene-malonitrile. |
| 4134763 |
Selenium-base photosensitive materials for electrophotography having super-finished substrate |
January 16, 1979 |
| Selenium-base photosensitive materials for use in electrophotography wherein a photoconductive layer consisting essentially of selenium is formed on a substrate whose surface is made rougher by a super-finish method. |
| 4134761 |
3-(9-Fluorenylidene)carbazole derivatives and electrophotographic light-sensitive material conta |
January 16, 1979 |
| 3-(-FLUORENYLIDENE)CARBAZOLE DERIVATIVES, PROCESS FOR PREPARING SAME AND ELECTROPHOTOGRAPHIC LIGHT-SENSITIVE MATERIAL CONTAINING 3-(9-FLUORENYLIDENE)CARBAZOLE DERIVATIVES. |
| 4134692 |
High speed impact printer |
January 16, 1979 |
| A type wheel comprises a rotary hub, a plurality of resilient, circumferentially spaced arms extending radially outwardly from the hub and a plurality of type elements provided at the end portions of the respective arms. The type wheel is rotated until the selected type element reach |
| 4119465 |
Diazo copying material for secondary original |
October 10, 1978 |
| A method of manufacturing a diazo copying material for use in preparing a secondary original, which comprises coating a water-dispersible precoating liquid comprising a porous powder, a binding agent and an anionic surface active agent having the following general formula on a transparen |
| 4119060 |
Toner charging apparatus |
October 10, 1978 |
| A development apparatus for use with dry type copying apparatus having: a development roller, which is rotated in close proximity to a latent electrostatic image bearing recording material; a hopper for supplying an insulating toner onto the development roller; and a single developer |
| 4116698 |
Ferrocyanate treating liquid for offset master |
September 26, 1978 |
| The present invention provides a treating liquid for use in treating offset masters which treating liquid consists essentially of ferrocyanate, water-soluble phosphate and a specific polymer or copolymer. By the use of this treating liquid, the durability of offset masters in printing ca |
| 4112470 |
System for repeatedly reproducing a recorded material of a limited duration |
September 5, 1978 |
| A system for repeatedly reproducing recorded information of a limited duration, suitable for use as a learning medium, using a multiplicity of recording tapes of a predetermined length, each having respective information recorded thereon, and a special playback unit. The playback uni |
| 4112467 |
Failure mode control apparatus for electronic graphic data transmission system |
September 5, 1978 |
| In a data transmission system comprising, for example, a facsimile transmitter connected to a facsimile receiver through a public telephone network, failure or malfunction sensors are provided at the transmitter and receiver which generate failure signals having the same frequency as |
| 4112443 |
Shutter and low-light indicator actuating device for a camera |
September 5, 1978 |
| Voltage comparators for actuating a camera shutter and a low-light indicating lamp respectively have inputs connected to junctions of photocells and resistors so as to be controlled in response to sensed light level. The voltage comparator for the low-light indicator energizes the in |
| 4111823 |
Dry developing powder including toner powders of different particle size |
September 5, 1978 |
| The present invention provides a dry developing powder prepared by mixing (A) a magnetic powder having a mean grain size of 10-30.mu. and which consists essentially of wax or thermoplastic resin and pulverized magnetic substance, with (B) a powder having a mean grain size of 5-20.mu. and |
| 4111152 |
Electrostatographic apparatus comprising improved development bias means |
September 5, 1978 |
| A magnetic brush applies a toner substance to a photoconductive drum for development. A bias voltage source applies a bias voltage across the series arrangement of a variable resistance means, the magnetic brush, the toner substance between the magnetic brush and the drum and a non-image |
| 4108656 |
Photoconductive member having a charge generating pigment and 2,4,7-trinitrothioxanthone as char |
August 22, 1978 |
| A photoconductive sensitive material composed of a conductive support and a photoconductive layer formed thereon, said photoconductive layer consisting essentially of charge generating pigment(s), 2,4,7-trinitrothioxanthone and resinous binder. |
| 4104183 |
Liquid developer for use in electrostatic photography comprising natural resins and natural resi |
August 1, 1978 |
| A liquid developer for use in electrostatic photography which comprises at least one kind of resin which is substantially insoluble in a carrier liquid consisting of a non-aqueous solvent with high insulating property and low dielectric constant, a polymer consisting essentially of at le |
| 4103311 |
Method and apparatus for adjusting the view finder of a single-lens reflex camera |
July 25, 1978 |
| A method and apparatus for adjusting the view finder of a single-lens reflex camera in which method and apparatus the adjustment of the angle of the swingable mirror and the adjustment of the optical distance from the taking lens to the focusing screen via the swingable mirror are both |
| 4103071 |
Thermoplastic recording members containing silicone oil, fluorocarbon oil or chlorofluorocarbon |
July 25, 1978 |
| Thermoplastic recording member in which a thermoplastic film recording layer is formed on a conductive support with the optional provision of an intermediate photoconductive layer, the resin film containing from 0.1 to 10% by weight of a silicone, fluorocarbon or chlorofluorocarbon oil, |
| 4099970 |
Derivatives of 1,3,4-oxadiazole and electrophotographic elements contaning same |
July 11, 1978 |
| 1,3,4-Oxadiazle derivatives expressed by the general formula ##STR1## wherein R represents cyanophenyl, nitrophenyl, dialkylaminophenyl (wherein alkyl has 1 - 4 carbon atoms), julolidyl, N-alkylcarbazoyl (wherein alkyl has 1 - 4 carbon atoms) or ferrocenyl radical are photoconductive |
| 4099484 |
Pressure fixing apparatus for electrophotography |
July 11, 1978 |
| A handle or knob is connected to laterally position parallel sheet edge guides so that the distance between the guides is equal to the width of a sheet to which a toner image is to be fixed by pressure rollers. The handle or knob is also connected to an adjustable spring assembly which |
| 4091208 |
.alpha.-(9-Anthryl)-.beta.-(3-carbazolyl)ethylene derivatives |
May 23, 1978 |
| .alpha.-(9-Anthryl)-.beta.-(3-carbazolyl)ethylene derivatives, process for preparing same and electrophotographic light-sensitive materials containing .alpha.-(9-anthryl)-.beta.-(3-carbazolyl)ethylene derivative. |
| 4091145 |
Support for electrophotographic sensitive plate |
May 23, 1978 |
| A support for use in electrophotographic sensitive plates which is superior in durability as well as half-tone reproducibility as photosensitive material and is prepared by forming a barrier layer on practically the whole surface of a conductive base plate by burying fine particles of |
| 4088484 |
Derivatives of 1,3,4-oxadiazole and electrophotographic elements containing same |
May 9, 1978 |
| 1,3,4-OXADIAZOLE DERIVATIVES EXPRESSED BY THE GENERAL FORMULA ##STR1## wherein R represents cyanophenyl, nitrophenyl, dialkylaminophenyl (wherein alkyl has 1-4 carbon atoms), julolidyl, N-alkylcarbazolyl (wherein alkyl has 1-4 carbon atoms) or ferrocenyl radical, are photoconductive |
| 4088092 |
Toner density sensing apparatus for electrostatic copying machine |
May 9, 1978 |
| A coil is provided to a developing tank containing a toner mixture consisting of ferromagnetic carrier particles and non-magnetic toner particles in such a manner as to be magnetically coupled with the mixture. The coil constitutes a frequency determining element of an oscillator. The |
| 4087584 |
Lithographic printing plate |
May 2, 1978 |
| A lithographic printing plate which comprises using in an ink-repellent layer a polymer of a monomer or a copolymer containing said monomer, said monomer being represented by the following general formulas: ##STR1## WHEREIN: R is hydrogen or a methyl radical; R' is hydrogen or an alk |
| 4087393 |
Non-aqueous resin dispersion and method of manufacturing thereof |
May 2, 1978 |
| A non-aqueous resin dispersion is obtained by dissolving a resin, which is substantially insoluble in non-aqueous solvents, in at least one monomer which can dissolve said resin, subjecting the resulting solution to polymerization reaction in the presence or in the absence of non-aqueous |
| 4087171 |
Electrophotographic exposure and development system |
May 2, 1978 |
| Imaging means are provided to radiate a light image of an original document onto a photoconductive drum to produce an electrostatic image. A developing electrode is disposed adjacent to the drum and voltage source means apply a biasing voltage to the developing electrode. Sensing means |
| 4082750 |
Trinitro-11H-indeno[1,2-b]quinoxaline-11-one and process for preparing same |
April 4, 1978 |
| Trinitro-11H-indeno[1,2-b]quinoxaline-11-one obtained by further nitrating 11H-indeno[1,2-b]quinoxaline-11-one, or mononitro- or dinitro-derivatives thereof, demonstrates a conspicuous sensitization effect with respect to organic photoconductors. |
| 4082441 |
Method and apparatus for producing and fixing a visible image on a thermoplastic layer of a phot |
April 4, 1978 |
| In a system especially suited to holography a transparent photoconductive material comprises a glass substrate, an electroconductive heating layer formed on the substrate, a photoconductive layer formed on the electroconductive layer and a thermoplastic layer formed on the photocondu |
| 4081805 |
Apparatus for displaying the amount of exposure in a single lens reflex camera using an electron |
March 28, 1978 |
| An apparatus for displaying the amount of exposure in a single lens reflex camera using an electronic shutter in which the shutter speed can be established either automatically or manually and can be displayed in a digital manner. When the shutter speed is manually established, the a |
| 4081391 |
Liquid developer for use in electrophotography |
March 28, 1978 |
| This invention provides a liquid developer for use in electrophotography which comprises a dispersion of toner particles in a carrier liquid having a high resistivity and a low dielectric constant and is superior in fixability, dispersion stability and redispersability, said toner pa |
