Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 8090295 | Conductive rubber member An object of the present invention is to provide a conductive rubber member which exhibits small environmental dependency and stable electrical resistance. The conductive rubber member is formed of a conductive elastic layer which has been imparted with conductivity... | 01/03/2012 |
| 7920810 | Electrophotography device with electric field applicator Embodiments of an electrophotography device are disclosed. ... | 04/05/2011 |
| 7321747 | Fixing device and image forming apparatus using the same A fixing device that applies heat energy to a recording medium having a toner image formed thereon to fix the toner image includes a flash fixing part that includes a flash lamp disposed in non-contact with the recording medium and applies heat energy to the toner i... | 01/22/2008 |
| 7265871 | Image formation processing method and image formation processing apparatus An image formation processing method for forming an image to be raised with color toners on a raised portion of an expandable toner which is formed on a recording sheet according to an original image, comprising extracting a contour section of the image to be raised... | 09/04/2007 |
| 7245846 | Oxidation catalyst unit and a wet-type electrophotographic image forming apparatus comprising the same and a method thereof An oxidation catalyst unit for a wet-type electrophotographic image forming apparatus which filters a vapor produced at a fusing unit and a method thereof are provided. The oxidation catalyst unit and method includes a duct for guiding the carrier vapor produced at ... | 07/17/2007 |
| 7174114 | Apparatus and method for reducing contamination of an image transfer device An apparatus and method for reducing contamination of an image transfer surface in an image transfer device includes a charging device for charging the image transfer surface. An airflow control system ventilates the charging device and restricts airflow adjacent th... | 02/06/2007 |
| 7079789 | Fuser mechanism in electrophotographic apparatus A fuser mechanism in an electrophotographic apparatus is disclosed. The fuser mechanism includes a first roller, a second roller, two elastic units, two adjusting devices, and a driving device. The first roller is rotatably and movably disposed in the electrophotogr... | 07/18/2006 |
| 7002728 | Electrophoretic particles, and processes for the production thereof Copper chromite particles can advantageously be used as black particles in electrophoretic media and displays. Preferably, the copper chromite particles are coated with a silica coating and a polymer coating. ... | 02/21/2006 |
| 6970258 | Non-printing patterns for improving font print quality Utilization of non-printing high-spatial-frequency auxiliary pixels are introduced into the bitmap of a font to obtain local control of the text image development by modification of local average voltage in the development nip. These auxiliary pixels embody frequenc... | 11/29/2005 |
| 6919973 | Auxiliary pixel patterns for improving print quality Utilization of non-printing high-spatial-frequency auxiliary pixels are introduced into the bitmap of an image to obtain local control of the image development by modification of local average voltage in the development nip. These auxiliary pixels embody frequencies... | 07/19/2005 |
| 6606470 | Color plane partial exposure for reducing edge effect A method for reducing edge effect (white gapping) between objects formed on a photoconductive member of an imaging device includes, during processing of a given color plane, partially exposing the photoconductive member for all image data that specifies a... | 08/12/2003 |
| 6026267 | Image forming apparatus including a pre-transfer eraser When image areas pass the pre-transfer eraser, a control unit sets the light quantity of the pre-transfer eraser so that the potential of the background areas changes to reduce the difference from the potential of the visible image areas. A pre-transfer s... | 02/15/2000 |
| 5895738 | Extension of xerocolorgraphy to full color printing employing additive RGB+ K colors An imaging system is provided which combines the perfect registration capabilities of xerocolography to form perfectly registered red, green and blue images in a single pass in one mode of operation. In another mode of operation, the color gamut possible ... | 04/20/1999 |
| 5740502 | Image forming apparatus and image forming method for forming adjacent images An image forming apparatus includes a photosensitive member; a charging member for charging the photosensitive member; an exposure device for exposing an image formation area of the photosensitive member charged by the charging member to light in accordan... | 04/14/1998 |
| 5592281 | Development scheme for three color highlight color trilevel xerography Creation of multiple color images is accomplished in a single pass utilizing a multilayered photoreceptor structure having layers which are responsive to different wavelength lasers. A composite image including three images areas is formed with substantia... | 01/07/1997 |
| 5570174 | Two-pass highlight color copier employing CAD scavengeless development & strong development potentials A two-pass light/lens highlight color copier in which high contrast images are created providing relatively large development fields or potentials compared to those associated with tri-level imaging. The imaging system disclosed has a conventional light l... | 10/29/1996 |
| 5568248 | Black and white reproducible pattern highlight color printing In a reproduction method for printing a hardcopy document with a highlight color printer so that the hardcopy document is printed with areas thereof printed with a selected highlight color imaging material and areas thereof printed with a black imaging ma... | 10/22/1996 |
| 5486899 | Image forming apparatus having a function of identifying a toner cartridge A control section 81 of a PPC outputs a request signal having a command that designates an encrypting rule to a cartridge CPU 45f of a toner cartridge. The control section 81 receives a response signal based on the output of the request signal from the ca... | 01/23/1996 |
| 5383008 | Liquid ink electrostatic image development system A method and apparatus form a toned image on a copy sheet using a transfer layer. An imaging member is charged and a latent electrostatic image is formed on it. Subsequently, a highly viscous or non-Newtonian liquid transfer layer is applied over the late... | 01/17/1995 |
| 5206687 | Color marking apparatus for a recording apparatus A color marking apparatus for marking designated areas of an original with a designated color by recording the whole area of an original with a first color, such as black. Desired areas on the original are designated, and the designated areas are colored ... | 04/27/1993 |
| 5150156 | Electrostatic image recording machine capable of multiple gradations An image recording machine for producing a high quality image both in a text part and in a photograph part, i.e., a crisp (low gradation) image in a text part and a gentle (high gradation) image in a photograph part. The gradation characteristic is altere... | 09/22/1992 |
| 5049949 | Extension of tri-level xerography to black plus 2 colors Highlight color printing apparatus and method for forming one black and two color images. A tri-level image containing CAD and DAD image areas and a background area is formed. A second DAD image is formed by discharging the background area forming part of... | 09/17/1991 |
| 4985733 | Image fixing unit for use in wet-type electrophotographic copying machine An image fixing unit for a wet-type electrophotographic copying machine capable of forming a latent electrostatic image on a photoconductor element, developing the latent electrostatic image to a visible toner image by a developer comprising a carrier liq... | 01/15/1991 |
| 4954843 | Electrophotographic image forming apparatus An image forming apparatus wherein a photosensitive layer arranged to rotate in one direction is charged by a charger, and a negative electrostatic latent image is formed thereon by an exposure unit and then is subjected to reversal development by a devel... | 09/04/1990 |
| 4903082 | Liquid ink fusing and drying system An apparatus which dries and fuses a liquid image of liquid carrier and toner particles to a sheet. The sheet passes through a nip defined by a support member cooperating with a roller. The roller contacts the liquid image on the sheet. Heat is applied to... | 02/20/1990 |
| 4897691 | Apparatus for drying and fusing a liquid image to a copy sheet A reproducing machine in which an electrostatic latent image recorded on a photoconductive member is developed with a liquid developer material comprising at least a liquid carrier having pigmented particles dispersed therein. The developed image is trans... | 01/30/1990 |
| 4835566 | Electrophotographic copying apparatus A first developing device is provided in a demountable manner near a photoconductor drum of an electrophotographic copying apparatus. There is further provided a second developing device most downstream along a direction of rotation of the photoconductor ... | 05/30/1989 |
| 4731635 | Liquid ink fusing and carrier removal system A reproducing machine in which an electrostatic latent image recorded on a photoconductive member is developed with a liquid developer material comprising at least a liquid carrier having pigmented particles dispersed therein. The developed image is trans... | 03/15/1988 |
| 4668073 | Fixing apparatus A photographic fixing apparatus in which photosensitive material to be fixed is fed between upper and lower inclined guideplates, preferably in the form of a plurality of parallel rods, with the lower plate being transparent and with both plates being ven... | 05/26/1987 |
| 4616925 | Reader printer The present invention is directed to a reader printer which handles an image of a microfilm held by an aperture card and maintained in such a manner that the microfilm center aligns with the center of card aperture. At the time of printing, the image of t... | 10/14/1986 |
| 4572647 | Hybrid development system An electrophotographic printing machine in which a latent image is recorded on a photoconductive surface. The latent image is developed with charged, insulating marking particles and magnetic, polar or polarizable marking particles. The charged, insulatin... | 02/25/1986 |
| 4538899 | Catalytic fixer-dryer for liquid developed electrophotocopiers A liquid developed electrophotocopier wherein liquid carrier dispersant transferred to a copy sheet concomitantly with the developed image is catalytically oxidized to provide harmless gaseous oxidation products at temperatures sufficiently elevated to va... | 09/03/1985 |
| 4537492 | Heater-drier for fusing toner images on wet printing plates A simple, reliable heater-fuser station for fusing toner images upon relatively stiff, resilient and moist printing plates includes a curved heater-platen positioned between a pair of entrance squeegee rollers and a pair of exit rollers. The angles betwee... | 08/27/1985 |
| 4531824 | Heater for electrophotographic copiers An improved heater for electrophotographic copiers wherein a plurality of laterally spaced heaters dry or fix the transferred image along narrow longitudinally extending strips to prevent smearing of the image from subsequent contact with feed wheels or g... | 07/30/1985 |
| 4518246 | Apparatus and method for forming multicolor electrophotographic images A plurality of constituent electrostatic color-separation images are produced in sequence for subsequent toner-development and superimposition and at least one developed constituent image is used to color-correct a succeeding constituent image which is no... | 05/21/1985 |
| 4509850 | Two-color electrophotographic printing machine An electrophotographic printing machine in which a latent image is recorded on a photoconductive surface with modulated and continuously charged regions. The modulated regions are developed with polar or polarizable marking particles with the continuously... | 04/09/1985 |
| 4384783 | Fixing device for wet-type electrophotographic copying machines A fixing device is provided for a wet type electrophotographic copying machine in which an electrostatic latent image formed on a photosensitive sheet at its face is developed by a liquid developer, and then the liquid developer attached to the photosensi... | 05/24/1983 |
| 4349268 | Electrostatic image-forming process and an apparatus therefor A method of forming an electrostatic image of an original having both black and color portions includes selective elimination of the black portion to produce individual color electrostatic images which can be separately developed with respect to another i... | 09/14/1982 |
| 4124287 | Imaging system utilizing uncharged marking particles An apparatus for imagewise marking a photoconductive imaging surface includes a means for forming an imagewise non-uniform charge pattern on the surface and a means for contacting the surface with uncharged marking particles.... | 11/07/1978 |
| 4086008 | Electrophotographic copying apparatus with device for exposing imaged photoconductive plate In an electrophotographic copying apparatus in which an imagewise exposed photoconductive plate moving to a developing station passes a light source and a light shield which are arranged for selectively exposing parts of the photoconductive plate outside ... | 04/25/1978 |
