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| Number | Title | Issue Date |
| 7338042 | Sheet supplying apparatus The uppermost original of a bundle of originals placed on a stacking tray is photographed by an area sensor, and on the basis of chroma saturation information of image information thus obtained, whether the original to be separated is a color original is discriminat... | 03/04/2008 |
| 7257278 | Image sensor for capturing and filtering image data An integrated image sensor for acquiring and processing electrical signals representative of an object comprising a photosite array configured to convert light into the electrical signals, an A/D converter configured to convert the electrical signals into digital da... | 08/14/2007 |
| 7225984 | Systems and methods for providing multiple object planes in an optical image scanning environment Systems and methods for optically scanning multiple object planes are provided. One embodiment is a system for optically scanning multiple object planes comprising a platen and an optical head for scanning. The optical head comprises an optical delay element, a firs... | 06/05/2007 |
| 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 |
| 6582868 | Image forming apparatus and developing agent A developing agent comprising a photocatalytic component is employed, wherein the developing agent is irradiated with predetermined light to decompose water molecule, thereby making it possible to prevent the electric charge of developing agent from being... | 06/24/2003 |
| 6185384 | Image forming apparatus with controller to activate the image forming unit depending on light source cycle-up time In an image forming apparatus having a printing function and a copying function, the copying operation can be performed as fast as possible without increasing the costs. An image forming apparatus in which an original image is read out by an image reader ... | 02/06/2001 |
| 5978627 | Method and system for measuring sensitivity of electrophotographic photoconductor A method and system for measuring sensitivity of an electrophotography photoconductor. The sensitivity is determined using changing information of the surface potential of the photoconductor and an exposure amount information which is precisely obtained b... | 11/02/1999 |
| 5771422 | Image forming apparatus An image forming apparatus includes an image carrier on which a static latent image is formed, a main charger to charge the image carrier, an operating portion to direct the output adjustment of the main charger, and a developing device to develop a stati... | 06/23/1998 |
| 5767888 | Process and arrangement for generating high-quality matrix print using electrophotographic printing equipment An electrophotographic process and arrangement for generates a macro-charge zone inkable by toner applicators and delimited by an inking limit (EG) having an adjustable contour on a photoconductor of a printing or copying machine, using at least one expos... | 06/16/1998 |
| 5381167 | Color image forming apparatus A color image forming machine includes a plurality of exposure units for irradiating an image carrier movable in a secondary scanning direction of the exposure units by primary scanning beams, at a plurality of irradiation positions to form latent images,... | 01/10/1995 |
| 5107300 | Image forming apparatus including means for controlling the amount of light exposure An image formation apparatus such as a copying machine has a standard white plate, an optical system for forming a latent image on a photosensitive drum, a photosensor such as a linear image sensor for detecting the amounts of light reflected from the sta... | 04/21/1992 |
| 5065185 | Multi-function detecting device for a document reproduction machine An optical sensing array is adapted to filter incident light so as to generate two output electrical signals from two different portions of the array. The sensing array, which can be a linear CCD array, is assembled with a glass filter overlying the array... | 11/12/1991 |
| 5061960 | Preexposure light control system for a photocopier A slit exposure type photocopier apparatus includes an original document platform on which an original document is to be located. An electrostatic latent image support member receives a projected image of the original document as a result of a scanning op... | 10/29/1991 |
| 5053818 | Method and apparatus for copying semi-transparent originals using a black backing member A method for copying relatively thin documents of semitransparent or thin stock which permit images on the reverse side to show through to other portions of the copy apparatus. A sensing system is employed to sense the density of the document and otherwis... | 10/01/1991 |
| 5005049 | Copying machine with capacity to measure transparency of original A copying machine of the present invention measures light transmittance of a document so as to adjust copying concentration on the basis of the measured result. The copying concentration is concretely adjusted by adjusting electrification voltage of a pho... | 04/02/1991 |
| 4992829 | Flash lamp intensity control for electrostatographic reproduction machines Flash lamp intensity control in which a small preflash lamp first exposes each document on the platen of an electrostatographic machine, a photosensor generates a signal representative of the intensity of the light reflected from the platen, and a control... | 02/12/1991 |
| 4952986 | Copying apparatus A copying apparatus having a prescanning function for obtaining density data to adjust copy parameters includes a correction function which eliminates the data obtained from a portion of a predetermined color, from the density data detected on a prescanni... | 08/28/1990 |
| 4912508 | Automatic background control for an electrostatic copier A document background control system having a sensor in the optical path of a reproduction machine to sense the background of a document in the copy mode during the scanning of the document to adjust the illumination of the document and also includes a co... | 03/27/1990 |
| 4831415 | Image forming apparatus controlled in response to detected characteristics of an original Image forming apparatus equipped with two detecting devices. The first device is used for determining the image forming condition prior to the image formation, and this condition is corrected during the image formation according to the state of the origin... | 05/16/1989 |
| 4831410 | Automatic exposure control system for flash exposure photocopiers A flash exposure photocopier provides a mechanism for automatically controlling photoreceptor exposure levels to compensate for the effects of documents having backgrounds of different densities. A photosensor and lens assembly is located within a flash h... | 05/16/1989 |
| 4745434 | Copying apparatus having progressive control means A copying apparatus or the like having means for scanning the original to form a line image continuously on a photosensitive member, thereby forming an entire image of the original. A photosensor is provided to scanningly detect the density of the origina... | 05/17/1988 |
| 4733276 | Automatic density control device for use in copying machine An automatic density control device in a copying machine combined with an automatic document feeder capable of feeding a document onto a document support table has a document density detector for detecting the density of a document placed on the document ... | 03/22/1988 |
| 4707114 | Method of automatically adjusting image density in image forming device An automatic image density adjusting method for an image forming device is disclosed which selects image density adequately in matching relation to any of various kinds of documents. There are selectively set up a first mode in which image density is sens... | 11/17/1987 |
| 4702590 | Image density control apparatus An image forming apparatus has a detector for detecting an image density of an original, a processing unit for forming an image, and a control unit for controlling an image forming condition of the processing unit. The control unit non-linearly controls a... | 10/27/1987 |
| 4684239 | Image forming apparatus with automatic regulation in response to image density A copying machine in which image forming conditions such as developing bias voltage is automatically regulated in response to the detected image density of the original document and to the sensitivity characteristics of the photosensitive drum, in order t... | 08/04/1987 |
| 4662738 | Density detecting apparatus which detects image density according to document size An image processing apparatus for a copying machine with an ADF, a facsimile or a printer, has a platen for placing originals or documents thereon, an optical system for scanning the original image, an AE measurement circuit for measuring the intensity ov... | 05/05/1987 |
| 4657377 | Image formation apparatus with variable density control An image forming apparatus including a controller for controlling the density of an image to be formed corresponding to a source of information, said controller including a detector for receiving a signal corresponding to information of image density, a c... | 04/14/1987 |
| 4627712 | Image density control apparatus Image density control apparatus including a photosensor for detecting a density of an image of an original, and a microcomputer for controlling a light intensity of a light source of a development bias voltage. The microcomputer has a CPU for determining ... | 12/09/1986 |
| 4624548 | Image density control device There is disclosed an image density control device having original density detector, a leading edge detector for detecting a leading edge of original, and controller for controlling image forming conditions in accordance with an output of said original de... | 11/25/1986 |
| 4588283 | Electrophotographic copying apparatus with original light detector An electrophotographic copying apparatus includes a light receiving element disposed to receive beams of light from the central and lateral end portions of an original to be copied through a lens, the output signal of the light receiving element being use... | 05/13/1986 |
| 4544263 | Copying machine having an image density control device An image density control device for use in an electrophotographic copying machine, employs a scanning light beam having a certain spot size for scanning over a printed original to be copied. Line-width detecting circuitry operates to determine print chara... | 10/01/1985 |
| 4474453 | Electrostatic copying apparatus The optical density pattern of an original document (26) is sensed during scanning movement for radiating a light image of the document (26) onto a photoconductive belt (27) which is held stationary during the scanning. Operating parameters of the apparat... | 10/02/1984 |
| 4378153 | Electronic duplicator Disclosed is an electronic duplicator having a focusing light transmitting body, which includes optical fiber tubes for image formation and optical fiber tubes for detecting the image density. The image density detection optical fiber tubes effect the mea... | 03/29/1983 |
| 4372674 | Copying machine having detectors for the background color and density of the original An apparatus for facilitating creation of an improved quality reproduction of an original to be copied includes a first sensor for producing a signal in accordance with the density of the background or nonimage are of the original, a second sensor for pro... | 02/08/1983 |
| 4352553 | Quality control copying apparatus The present invention concerns copying apparatus which automatically controls the quality of copies. The copying apparatus includes a density detector for detecting the frequency of occurrence of density values along a scanning line of a document to be co... | 10/05/1982 |
| 4304486 | Automatic bias and registration control system for electrophotographic copier In an optical imaging system for an electrophotographic copier, a photodetector intercepts a portion of unfocused light being reflected toward the photoconductive surface. An electronic circuit generates a biasing voltage for the copier development electr... | 12/08/1981 |
| 4279498 | Electrostatographic copying apparatus with automatic toner density control A photoconductive drum (32) is charged, radiated with a light image of an original document (34) and developed to produce a toner image. The density of the toner image is sensed and additional toner fed to a developing unit (37) if the sensed density is b... | 07/21/1981 |
| 4239374 | Electrostatographic apparatus comprising automatic document type determination means An image of an original document (16) is sensed to determine if the document (16) is a printed document (the image consists of characters and symbols) or a photographic document. The exposure illumination intensity, developing bias voltage and/or other va... | 12/16/1980 |
| 4236812 | Image recording method for electrophotographic film A system for impressing images on electrophotographic film provides for the charging of each film frame rapidly to a peak voltage determined by the prevailing light conditions of the image to be produced or recorded. After charging the film frame is immed... | 12/02/1980 |
| 4215930 | Method of maintaining the correct conditions of an electrophotographically duplicated image A method of maintaining the correct conditions of an electrophotographically duplicated image, which uses a reference plate having at least a dark-tone area and a light-tone area and in which signals associated with the reference plate are detected and sy... | 08/05/1980 |
