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"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 5206686 | Apparatus for forming an image with use of electrophotographic process including gradation correction An apparatus such as a digital printer for forming a image with use of electrophotographic process with a reversal development system, the density is controlled automatically by varying the sensitizing electric potential VO of the photoconducto... | 04/27/1993 |
| 5204716 | Side-free recording apparatus An image recording apparatus capable of forming an image freely on the front side and the back side of a paper sheet and applicable to a laser printer, digital copier, etc. A toner image is formed on either one or both of a photoconductive element and an ... | 04/20/1993 |
| 5179395 | Multi-mode image forming apparatus Copying apparatus operable in two-color mode using two developing devices. The copy operation in the two-color mode forms an electrostatic latent image on a photosensitive member by means of exposure to image light, develops said latent image using two de... | 01/12/1993 |
| 5179411 | Inversion development controller An apparatus and method for inversion development control for an image forming device in which toner and carrier particles are prevented from scattering unnecessarily. Scatter prevention is performed by gradually changing both a bias voltage application t... | 01/12/1993 |
| 5164771 | Image forming apparatus which adjusts illumination levels independently for test samples and for originals An image forming apparatus includes a detector for measuring the surface potential of a photosensitive member on which an electrostatic latent image is formed and a controller which regulates image formation plural times in accordance with the measured su... | 11/17/1992 |
| 5159388 | Image forming apparatus An image forming apparatus comprising a charging section for uniformly charging a surface of a photoconductive body; an image forming section for forming an image on the photoconductive body charged by the charging section; a detecting section for detecti... | 10/27/1992 |
| 5142326 | Image forming apparatus eliminating image of document cover When an original is carried onto a support by a carrier in accordance with a depression of a copy key a density of an image formed on a transferred medium is decreased. Formation of an unwanted image caused by an opening portion of a covering can be preve... | 08/25/1992 |
| 5053815 | Reproduction apparatus having real time statistical process control Document reproduction apparatus includes a plurality of sensors for acquiring real time diagnostic data. The acquired data is statistically compared to predetermined control limits or reference value(s) to predeict incipient problems before failure occurs... | 10/01/1991 |
| 5036360 | Moisture compensation for electrostatographic apparatus An electrostatographic reproduction apparatus transfers a toner image from an image member to a receiver sheet by applying an electric field between the image member and the receiver sheet in a direction urging the toner image to the receiver sheet. A pro... | 07/30/1991 |
| 5021822 | Image scanning apparatus having exposure lamp lighting on at improved timing An image scanning apparatus according to the present invention is directed to a copying apparatus capable of continuously copying a plurality of sheets on a record medium, including a platen on which an original is placed, an illuminating device for illum... | 06/04/1991 |
| 4974026 | Reverse development electrophotographic apparatus and image forming method using a dispersion-type organic photoconductor An electrophotographic apparatus comprising a photosensitive member, charging means for providing a surface potential to the surface of the photosensitive member, image exposure means for exposing the photosensitive member to form an electrostatic latent ... | 11/27/1990 |
| 4952982 | Copying apparatus and method A copying apparatus and method is disclosed. Provided as main parts are detection means for detecting the separation condition of the recording paper and control means for controlling at least one of charging means, separation means, and transport means i... | 08/28/1990 |
| 4942429 | Image recording apparatus with a removable developing unit A developing unit or similar recording unit which is removably mounted on an image recording apparatus is provided with a constant voltage device or similar level adjusting means which has a particular characteristic matching with recording color of the r... | 07/17/1990 |
| 4921772 | Two directionally operating imaging system A method and the apparatus to perform the electrostatic transfer of a developed image from a permanent master to a receiving surface are provided whereby in a first generally horizontal direction the image is charged and developed and in an opposing secon... | 05/01/1990 |
| 4922293 | Control system for an image forming apparatus A control system for a copier, printer, facsimile apparatus or similar image forming apparatus which uses electrophotography controls, by digital control and by using a single signal line, a respective one of various control units for implementing image f... | 05/01/1990 |
| 4879577 | Method and apparatus for controlling the electrostatic parameters of an electrophotographic reproduction device The saturation voltage of a photoconductor used in a discharged area development (DAD) reproduction device is used to control and maintain the voltage vectors that are associated with (1) the photoconductor's fully charged background area, (2) the develop... | 11/07/1989 |
| 4877698 | Electrophotographic process for generating two-color images using liquid developer A process for generating two-color images comprising: (1) charging an imaging member in an imaging apparatus; (2) creating on the member a latent image comprising areas of high, intermediate, and low potential; (3) providing an electrode having a potentia... | 10/31/1989 |
| 4857960 | Control device for image processing or forming apparatus A control device for controlling plural analog devices in an image processing apparatus. The control device has a first controller for controlling the function sequence of analog devices, an analog-to-digital converter for obtaining digitals signals from ... | 08/15/1989 |
| 4837104 | Scavenging field for electrostatographic printing machine An imaging process having reduced toner contamination of the printing machine and copies produced therefrom is provided where successive developed toner images are formed on successive registered areas of an endless imaging member movable through a path p... | 06/06/1989 |
| 4739231 | Image forming system There is provided a moving body control device comprising a motor for driving a moving body, detector for detecting the speed of the motor, memory for storing a program for the phase comparison control of the speed of the motor, and control means for cont... | 04/19/1988 |
| 4734740 | Image formation method and apparatus An image formation apparatus includes an electrostatically chargeable member having an optical density that changes with change of its reproducing power. A charging device forms an electrostatic latent image on the chargeable member, and a developing devi... | 03/29/1988 |
| 4727395 | Reverse developing image forming apparatus with small drum In an image forming apparatus according to the present invention, a cleaning device which allows for the repeated use of a photosensitive drum is removed from a space between a transferring device for transferring a visible image to the transfer sheet and... | 02/23/1988 |
| 4542981 | Degradation compensation of photoreceptor sensitivity for electrophotographic copying machine An electrophotographic copying machine is provided having a photoreceptor, a corona discharger, a lamp, and a compensation circuit. The corona discharger is activated to provide a corona discharge toward the photoreceptor to uniformly and initially charge... | 09/24/1985 |
| 4521847 | Control system job recovery after a malfunction The present invention is a multiprocessor control system that allows full job recovery after a machine power down or after a malfunction or software crash or temporary power outage. In particular, essential variables such as the state and status of the ma... | 06/04/1985 |
| 4502777 | Transfer type electrophotographic copying apparatus with substantially constant potential control of photosensitive member surface An electrophotographic copying apparatus which includes a photosensitive member or photoreceptor which is repeatedly utilized for formation of electrostatic latent images on it, a device for forming an electrostatic latent image on a photoreceptor surface... | 03/05/1985 |
| 4500195 | Image forming apparatus and a unit detachably used in the same For an image forming apparatus operable according to the electrographic method or magnetic recording method, it is proposed to form, as respective detachable units, some components of the apparatus for the purpose of easy exchange of wasted and consumed p... | 02/19/1985 |
| 4428664 | Method and device for cleaning photosensitive screen in an image forming apparatus A device for cleaning a photosensitive screen having a multitude of fine openings for use in image formation wherein primary and secondary electrostatic latent images are formed on the screen by voltage application, the device being constructed with means... | 01/31/1984 |
| 4420247 | Computer control means for an electrostatic recording apparatus A surface potential measuring meter and an electrostatic recording apparatus are disclosed. The surface potential measuring meter detects the surface potential on an object to be measured as AC signal. The electrostatic recording apparatus is provided wit... | 12/13/1983 |
| 4394085 | Processing station for charging, exposing and developing printing masters A processing station for charging, exposing and developing printing plates comprising an exposure table, two corona devices, a developing unit and an optical scanning exposure device; said exposure table being adapted to be rotated through 180° about a p... | 07/19/1983 |
| 4367944 | Charging potential control means for electrophotographic copiers In a copying apparatus having a photosensitive member such as a drum, good reproductivity and image density results from applying a proper charging potential to the photosensitive substance on the drum. The optimum charging potential for each drum can be ... | 01/11/1983 |
| 4346983 | Xeroradiographic intraoral dental system An x-ray imaging system for intraoral dental radiography. The imaging process is based on xeroradiographic principles, the surface of a small photoconductive plate being electrically charged. After insertion into a carrier, to form a light-tight cassette,... | 08/31/1982 |
| 4335952 | Copy quality diagnostic procedure Copy sheets produced by varying copier machine subsystems for analyzing subsystems' performance. By varying parameters, sequencing the coronas, and inhibiting the various subsystems of a copy machine in certain orders, the resulting copy sheets can be ana... | 06/22/1982 |
| 4314018 | Cleaning process for an electrostatic copying apparatus An electrophotograhic copying process forms an electrostatic latent image on the surface of a photosensitive member, developes the image by applying a monocomponent developer to the latent image to form a toner image, transfers the thus formed toner image... | 02/02/1982 |
| 4286036 | Process for reversal development For reversal development of an electrical potential pattern formed by imagewise exposure of a uniformly charged photoconductive layer, the charging of the layer is restricted to such a level below its breakdown voltage that the contact between the photoco... | 08/25/1981 |
| 4219271 | Image forming method and device for controlling image density Disclosed is an image forming apparatus of a type, in which there is provided first and second electrically chargeable members, a first processing device to form a primary electrostatic latent image on the first chargeable member, a second processing devi... | 08/26/1980 |
| 4179213 | Vector pinning in an electrophotographic machine Apparatus and method for pinning the value of a white, gray or otherwise colored, single-shaded vector in an electrophotographic machine. The vector is the value of the image voltage minus the developer voltage. Valuation of changes in the image voltage a... | 12/18/1979 |
| 4142792 | Electrophotographic apparatus A large number of copies of a small original document such as a card are made quickly by forming electrostatic images of the document circumferentially spaced from each other on the periphery of a rotating photoconductive drum. The electrostatic images ar... | 03/06/1979 |
| 3960444 | Electrophotographic printing machine An electrophotographic printing machine and method of use therefor in which a plurality of light images of the same original document are formed. Each of the light images is of a different predetermined magnitude and irradiates a charged photoconductive m... | 06/01/1976 |
