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| Number | Title | Issue Date |
| 8010003 | Apparatus to prevent contamination of fixing unit in image forming apparatus and method of using such When the density of a toner image of a leading end of a printing sheet is no less than a predetermined reference density, a printing start time is delayed or printing data is deleted so that printing data is not printed in the leading end of the sheet. When the prin... | 08/30/2011 |
| 7251055 | Image forming apparatus having a function for correcting color deviation and the like An image forming apparatus using an exposure unit of a solid-scanning type such as an LED head, reads out linear distortion correction data of an LED unit, then, calculates an amount of correcting color deviation based on the read-out data, and after that, carries o... | 07/31/2007 |
| 7233419 | Scanner having a self collection light source A scanner using a self-collection light source, is composed of a light source either with its tube walls coated with a layer of total reflective material, or a tube wall made to have a converging lens-like wall, so that the light source itself has built-in light con... | 06/19/2007 |
| 7224496 | Positioning device for scanned object of scanner The invention relative to a positioning device for the scanned object of a scanner may make a positioning function to a document or a book to be scanned. Through designing a positioning element on the shell body of a scanner, a book of many pages may be positioned o... | 05/29/2007 |
| 7110698 | Original reading apparatus with openable and closable state and control based thereon An original reading apparatus with an original feeding apparatus pivotally connected thereto, including a detecting device for detecting the opened state and the closed state of the original feeding apparatus, and a controller for rendering a part or the whole of th... | 09/19/2006 |
| 7055743 | End-of-travel focus shift in an optical image scanner End-of-travel focus shift in an optical image scanner is provided. One embodiment comprises a method for optically scanning. Briefly described, one such method comprises translating an optical head to a first end-of-travel position and adjusting the distance between... | 06/06/2006 |
| 7042598 | Variable reflectance cover A variable reflectance cover for a scanning system. The cover comprises a backing moveable through a plurality of positions. Moving the backing through the plurality of positions varies the reflectance of the cover. In one embodiment, the backing is an endless rotat... | 05/09/2006 |
| 7023548 | Photoelectric measuring device A device for the density or colorimetric measurement of a measured object, i.e., a densitometer or colorimeter, comprising a light source for directing measurement light onto an object to be measured, a polarization filter positioned between the light source and the... | 04/04/2006 |
| 6987575 | Printing device which operates with at least three brightness steps and methods to be executed therewith for determining printing parameters The invention relates to a method for operating an electrophotographic printing device (10). A multilevel character generator (22) is used in said printing device (10). Correction parameters (K1, K2, K3) are determined for l... | 01/17/2006 |
| 6945921 | Roller for a printer, fax machine or copier A roller intended to be in contact with toner particles is provided with a cured resin layer having homogeneously dispersed carbon black aggregates and having a thickness of less than 200 μm, whereby the carbon black aggregates have a weight average size low... | 09/20/2005 |
| 6002892 | Image reading apparatus with specular reflection backing member arranged to prevent reading of an unwanted image on a reverse side of a thin original An image reading apparatus including a backing member arranged on the original transport path, a light source for emitting the light toward the original reading position in the original transport path in the direction of a predetermined incident optical a... | 12/14/1999 |
| 5933682 | Copier/printer with manual adjustment for cross-track uniformity An electrostatographic reproduction method and apparatus includes an electrostatic recording member moving in a process direction. A plurality of recording elements on a writer imagewise expose the recording member to form electrostatic latent images on t... | 08/03/1999 |
| 5884119 | Light exposure controlling method of electrophotographic apparatus for suppressing fringe in picture In the tri-level process in which positive and negative latent images are formed on a photosensitive body and then developed using toners of two colors (for example, red and black) charged respectively to opposite polarities with respect to the polarities... | 03/16/1999 |
| 5828841 | Video signal recording and reproduction apparatus A video signal recording and reproduction apparatus, provided with at least one encoding apparatus for encoding an input video signal, at least one data storage apparatus for recording and reproducing a video signal encoded by the encoding apparatus, a li... | 10/27/1998 |
| 5821977 | Image forming apparatus and control method for reducing the required processing time The invention provides an image forming apparatus which requires only a little standby time at the time of shifting from a standby state to a usual operation state, and accordingly can reduce the required processing time. In a copy machine 2 employed in t... | 10/13/1998 |
| 5754922 | Automatic exposure adjusting method and apparatus This invention concerns an automatic exposure adjusting apparatus which permits infallible production of a signal corresponding exactly to the density of a given original document constantly even when the components of an optical system thereof cause any ... | 05/19/1998 |
| 5754921 | Copier having a density detector with fluorescent-dye-coated reflecting plate An original density detecting apparatus includes a projector-receiver including a light projector and a light receiver, and a reflecting member including a fluorescent reflecting plate a surface of which on the projector-receiver side is a coating of a fl... | 05/19/1998 |
| 5734948 | Image stabilizer In order to effectively perform image stabilization by control of retaining initial characteristics of a photosensitive body, if correlation between initial and aged values corresponding to bright and dark part signals of the photosensitive body is such t... | 03/31/1998 |
| 5659838 | Method and system for substantially eliminating a shadow effect during duplication The current invention discloses photocopying methods and systems for substantially eliminating shadows caused by uneven surfaces of an original by the use of a light diffusing element or a carrier sheet which automatically triggers the associated photocop... | 08/19/1997 |
| 5634173 | Image forming apparatus capable of controlling amount of light of light source In an adjustment mode, a black reference member is positioned opposite to a photosensor. Light reception data output from an A/D converter at this time is stored in a memory. In an image formation mode, based on a value obtained by subtracting output data... | 05/27/1997 |
| 5585890 | Neural network controlled image copying apparatus An image forming apparatus is disclosed which, by using a neural network to have preliminarily learned input conditions for a number of characteristic originals and having only the coupling coefficient after the learning and the output calculating portion... | 12/17/1996 |
| 5555076 | Apparatus for controlling an exposure An apparatus for controlling an exposure in an image forming apparatus includes an exposure unit which varys the illumination from an exposure light source in accordance to photoreceptor sensitivity and projects the light reflected onto a photoreceptor, a... | 09/10/1996 |
| 5467195 | Density adjustment in an image processing apparatus An image forming apparatus has a producing device for producing density information from an original image signal, an image forming device for effecting image formation, and a controlling device for controlling an image formation condition based on the de... | 11/14/1995 |
| 5428425 | Automatic density adjusting device in copying machine In an automatic density adjusting device in a copying machine, the width of variation in exposure intensity in relation to the change in a density correction value or magnification manually set is set to a large width if a document is dark, while being se... | 06/27/1995 |
| 5402210 | Dynamic developer bias control for use in an electrostatographic printing machine A method and apparatus for providing a novel dynamic developer bias control system adapted to determine an optimal developer bias during the processing of the lead edge of an input document. Loss of image density for images on the lead edge of a document ... | 03/28/1995 |
| 5392097 | Image processing apparatus An image processing apparatus includes a sensor for sensing image density of an original, a determining unit for determining an image processing condition corresponding to image density sensed by the sensor, based on a parameter, a setting unit for settin... | 02/21/1995 |
| 5260745 | Image exposing and forming apparatus with original density detection An original image processing apparatus such as a copying machine has a fluorescent lamp for exposing an original image, a photodiode for detecting the quantity of light reflected from a standard white plate or the original, an optical system for forming a... | 11/09/1993 |
| 5253014 | Image forming apparatus including a controller for controlling image forming conditions in accordance with normalized differences in detected densities An image forming apparatus has an illumination lamp and a controller for varying the intensity of light rays from the illumination lamp in accordance with a first base density area and a second image density area. The first density will be determined in a... | 10/12/1993 |
| 5229816 | Original image reading device An original image reading device includes an original mount, a feeder for separating and feeding originals on the original mount, a first feed path for guiding each separated and fed original to a reading position, and an inlet for introducing the origina... | 07/20/1993 |
| 5227845 | Copying apparatus An apparatus for performing a copying operation contains a photosensitive drum, a focusing optical system for directing reflected light from an original image onto the photosensitive drum, a lamp for lighting the original image, a light quantity sensor fo... | 07/13/1993 |
| 5214474 | Copying apparatus The intensity of a light emitted from a light source and reflected on a document is detected by an exposure sensor. A control section controls an exposure adjusting circuit to adjust an intensity of the light emitted from the light source based on a detec... | 05/25/1993 |
| 5134438 | Image forming apparatus having a device for measuring an original density An image forming apparatus is provided with an original density detecting device for detecting the original density, and output characteristic switching device for switching the output characteristic relative to the original density detected by the origin... | 07/28/1992 |
| 5087942 | Automatic set-up for electrophotographic copying of transparency originals An electrophotographic copier uses a first light source to copy reflection originals and uses a second light source to copy transparency originals. Operation of the copier is adjusted to attain a desirable copy image of reflection originals using the firs... | 02/11/1992 |
| 5081492 | Exposure control system An exposure control system for a document copier is enabled by positioning a segmented variable reflectance mirror along the optical imaging path. The mirror segments incorporate a material whose transmission changes in response to applied voltage signals... | 01/14/1992 |
| 5065184 | Light amount control apparatus A light amount control apparatus contains an exposure lamp, a photo sensor for receiving light from the lamp, an AC power source for applying an AC voltage to the lamp, a CPU for computing an electric power to be supplied to the exposure lamp in accordanc... | 11/12/1991 |
| 5043766 | Exposure control apparatus for variable magnification copying machine An exposure amount for a document is adjusted by using three modes, i.e., a one-to-one magnification adjustment mode for adjusting an exposure amount for a document at a one-to-one magnification, an enlargement adjustment mode for adjusting an exposure am... | 08/27/1991 |
| 5006892 | Xerographic setup and operating system for electrostatographic reproduction machines An automatic xerographic set up and monitoring process for a multi-mode electrostatographic machine in which a corona charge intercept value is obtained and used to optimally set corona charging levels for different modes, optimum flash exposure levels ob... | 04/09/1991 |
| 4990957 | Automatic exposure device An automatic exposure control device for use in a copying machine in which a light source for illuminating the light to an original document is controlled based on the signal representing the light amount of the original document sensed by a light senses.... | 02/05/1991 |
| 4982232 | Exposure control system of image forming apparatus An exposure control system includes (a) a first detecting unit for detecting the original image density of an original document and producing a first signal variable with the detected original image density, (b) a control unit for regulating the quantity ... | 01/01/1991 |
| 4980720 | Document reproduction machine with enhanced book copying capability A book copying mode of operation is presented which utilizes a height detector device associated with the scan mechanism to obtain a series of output signals representing changes in the distance between the scan mirror and the book pages being copied. As ... | 12/25/1990 |
