Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 7374854 | Image-forming method and image-forming apparatus using the same The present invention provides an image-forming method, including pseudo-halftone-processing an input signal corresponding to image information to generate an output signal; irradiating a radiation beam corresponding to the output signal onto a latent image-holding ... | 05/20/2008 |
| 7345791 | Image processing device and image processing method An image processing device for processing an input image so as to reproduce a halftone, includes: a matrix setting section for setting a threshold matrix having a plurality of elements arranged in M columns×N rows, at least two threshold values being stored in each... | 03/18/2008 |
| 7218420 | Gray level halftone processing An image processing method and apparatus for generating a gray level rendered pixel value that has been subjected to a halftoning process. In the method and apparatus a gray level pixel value of the pixel to be rendered by the halftoning process is provided as one i... | 05/15/2007 |
| 7215444 | Systems and methods for designing zero-shift supercell halftone screens Conventional design tools were not developed for designing square zero-shift supercells. Conventionally, solutions that enable square zero-shift supercells were found by trial and error or by exhaustive analysis. According to a first design criterion of this inventi... | 05/08/2007 |
| 7079287 | Edge enhancement of gray level images A method and apparatus for processing gray level image data. Gray level image data is subjected to plural separate halftone screen processing to form plural separate halftone processed screen gray level image data. The current pixel is also analyzed for contrast ind... | 07/18/2006 |
| 7020349 | Halftone watermarking and related applications Digital watermark embedding is incorporated into processes for generating halftone images. In a halftone process using a halftone screen, the halftone screen is used to determine the geometric distortion of an image. After determining the geometric distortion, a wat... | 03/28/2006 |
| 6965750 | Image forming apparatus An image forming apparatus of this invention is provided with a conveying guide that is curved in the direction reverse to the curved shape of a nip portion of a fixing unit in order for leading sheet paper that is vertically conveyed at the time of fixing in the ho... | 11/15/2005 |
| 6954276 | Printer controller circuit An integrated circuit fabricated on a single substrate that includes a data bus and purpose-specific functional units connected to the data bus. The functional units include a halftoner and a printhead interface. A general-purpose processor is connected to the data ... | 10/11/2005 |
| 6867791 | Image forming apparatus and image forming method An image forming apparatus includes an electrophotographic developing device, a photosensitive body, a precharger for precharging the photosensitive body, and exposing units of two optical systems with different light amount distributions, which are provided for one... | 03/15/2005 |
| 6760464 | Halftone watermarking and related applications Methods embed a digital watermark into a halftone image. One method derives halftone thresholds from a watermark image, and then uses these thresholds to convert target images into watermarked halftone images. A method for measuring digital watermark strength is use... | 07/06/2004 |
| 6684047 | Image forming apparatus with reduced image defects An image forming apparatus has a latent image carrier on which a latent image is formed. A developer carrier conveys a one-component non-magnetic developer and develops the latent image either in close proximity to or in contact with the latent image carr... | 01/27/2004 |
| 6111593 | Using multiple digitally-produced exposure levels to compensate for laser absorption in read image-on-image xerography A method for achieving multiple exposure levels for IOI (IMAGE-ON-IMAGE) xerography when imaging a second color through a first toner layer previously developed on the photoreceptive member. In the example illustrated the data from the previous image path... | 08/29/2000 |
| 6067102 | Electrophotographic recording device and exposure controlling device therefor In an electrophotographic printing apparatus for printing using a three level printing method, there are provided a first color data memory and a second color data memory which memorize the pixel data of every color sent from host equipment, such as a com... | 05/23/2000 |
| 6057866 | Color image forming apparatus and method using color compensation A color image forming method, including the steps of: charging a front surface of a photoreceptor; conducting image wise exposure onto the charged front surface from a rear surface of the photoreceptor so that a latent image is formed on the front surface... | 05/02/2000 |
| 5867198 | Method for estimation of toner usage in digital xerographic copiers and printers An improved method for estimating toner usage in digital xerographic printers and copiers. The method is characterized by taking into account digital image dot spreading which results in the area of a pixel not being developed fully and some areas outside... | 02/02/1999 |
| 5860047 | System and method for variable toner output in output devices A pixel matrix preferably containing nine pixels is analyzed to determine whether or not all of the image values for the pixels in the pixel matrix correspond to a full saturation level. If the image values do correspond to full saturation level, preferab... | 01/12/1999 |
| 5839035 | Photomode contrast control system for an electrostatographic printing machine An electrophotographic copying machine adapted to operate in either a functional or a pictorial mode, such that, in the pictorial mode, a light signal is transmitted through a line screen member to modulate an electrostatic latent image of an original doc... | 11/17/1998 |
| 5761574 | Image forming apparatus An image forming apparatus includes an image bearing member for bearing a toner image, and a transfer member for transferring the toner image from the image bearing member onto a transfer material at a transfer position. The transfer member contacts a sur... | 06/02/1998 |
| 5608504 | Transfer material detecting device A transfer material detecting device contains a transfer material carrier that detachably carries a transfer material to transport the transfer material to a transfer region where a toner image of an image carrier is transferred to the transfer material; ... | 03/04/1997 |
| 5546165 | Scanner as test print densitometer for compensating overall process drift and nonuniformity An electrostatographic copier or copier/printer apparatus and method for calibrating same with an improved means for adjusting for process control parameters is described. The apparatus includes a scanner for scanning an original document to be copied and... | 08/13/1996 |
| 5537223 | Rotating non-rotationally symmetrical halftone dots for encoding embedded data in a hyperacuity printer A printing system for receiving grayscale input image data and rendering halftoned image data having embedded data on a recording medium includes an addressable three dimensional memory system. The memory system has a first set of address lines defining a... | 07/16/1996 |
| 5528515 | Image proofing apparatus for gravure printing Image data of Y, M, C and K color separations received from a layout system through an interface circuit are applied through a color computation circuit to a chemical element adjusting LUT (lookup table). The chemical element adjusting LUT identifies colo... | 06/18/1996 |
| 5512982 | Image-forming apparatus with a photosensitive member and a charging device having an oscillatory voltage source An image-forming apparatus for forming an image, especially a halftone image, by using a photosensitive member, having a charging member for charging the photosensitive member, a mechanism for relatively moving the charging member and the photosensitive m... | 04/30/1996 |
| 5438394 | Image forming apparatus usable with a carrier having magnetization controlled in relation to recording density An image forming apparatus includes an image bearing member; a latent image forming device for forming on the image bearing member a dot distribution electrostatic latent image in accordance with image signals corresponding to an object image; a developin... | 08/01/1995 |
| 5349377 | Printer toner usage indicator with image weighted calculation An improved system for more accurately estimating consumption of toner imaging material in a digital xerographic printer in relation to a count of the digital pixels generating the various images being printed, where the frequency rates of the switching b... | 09/20/1994 |
| 5343235 | Apparatus and method for forming an image including correction for laser beam size An apparatus and a method for forming an image with use of electrophotographic process, wherein the effect of the diffusion of electrostatic latent image and of beam size is compensated by changing the quantity of light for exposure, a gamma transformatio... | 08/30/1994 |
| 5289235 | Image producing apparatus A screen lamp can be mounted easily. A belt type photoreceptor 15 is rotatably provided along a plurality of rollers 14 and 14-1, and a screen lamp 28 is mounted on there are side of the belt type photoreceptor 15 with respect to the rollers 14-1. The rol... | 02/22/1994 |
| 5245387 | Electrophotographic apparatus with reduced contamination from toner scattering The present invention provides a compact electrophotographic device in which the gap between a screen and a photosensitive body can be kept uniform throughout the screen, no fogging is caused on a copied imaged, no wasteful space is around the photosensit... | 09/14/1993 |
| 5150158 | Flat screen for an electrophotographic printing device An electrophotographic printing device having an arcuate photoconductive member (12) includes a flat screen member (32) that is spaced apart from the arcuate photoconductive member (12). A plurality of arcuate opaque lines are disposed on the screen membe... | 09/22/1992 |
| 5087944 | Image forming apparatus with control means for the surface potential of a photosensitive body An equal voltage is applied to a corona shielding case and a screen grid, when a normal mode is set, while a switch is changed over to connect the shielding case to ground when a photo mode is set. Therefore, part of a discharge voltage from a corona disc... | 02/11/1992 |
| 5065199 | Obtaining color balance for optical copiers by setting the exposure and primary voltage for each color An electrostatographic color copier includes a photoconductor imaging member, means for variably charging the imaging member, and means for imagewise projection exposing the charged photoconductor imaging member with a series of color separation light ima... | 11/12/1991 |
| 5019866 | Pressurized screen assembly for exposure of a continuous tone image In a reprographic or graphic arts application halftoned latent images of a continuous tone original image are created by imagewise exposure of a photosensitive member through a pressurized screen assembly. A transparent platen supports the original with o... | 05/28/1991 |
| 4989043 | Color-balance control method In a multicolor image-forming apparatus having a photoelectric sensor for detecting the amount of toner of an unfixed toner image adhering onto a photosensitive element, and a toner density sensor for detecting the density of a developer in a developing m... | 01/29/1991 |
| 4965636 | Electrostatographic machine with screening Each region of a photoconductive member receives an electrostatic charge over a predetermined time period. An electrostatic latent half-tone pattern image is screened on the photoconductive member such that exposure of the photoconductive member to a ligh... | 10/23/1990 |
| 4959791 | Control system for enhancing gray tones of a digitally operated printer A digitally operated printer, particularly a laser printer, has a control system which controls supply of operational signals to the printer from a signal source. The control system incorporates a converter which converts groups of input signals into larg... | 09/25/1990 |
| 4928142 | Combination erase device A device for erasing charges from an area of a charged electrophotographic image-bearing member includes a light source mounted on an electroluminescent (EL) panel which has a slot and semi-transparent members that project partially into the slot. Light f... | 05/22/1990 |
| 4845524 | Image forming method The disclosure relates to a method, using an electrophotographic system, including a first process of transferring the image of an original document to a copy sheet and a second process of transferring a half-tone solid on a specified region of the image ... | 07/04/1989 |
| 4740818 | Electrophotographic reproduction apparatus and method with selective screening An electrophotographic reproduction apparatus and method are provided for reproducing an original document sheet that includes a continuous tone pictorial information area and a line-type information area. Rather than reproducing the entire document sheet... | 04/26/1988 |
| 4708459 | Electrophotographic color proofing apparatus and method Electrophotographic color proof generating apparatus includes a charger station, an exposure station, and a development station. Starting with color half-tone separations of artwork, the apparatus, using a unique method, electronically controls the exposu... | 11/24/1987 |
| 4537490 | Apparatus and method for electrophotographically producing copy having continuous-tone and other content Method and apparatus for electrophotographically producing high quality reproductions which contain different content types. Photoconductor image sectors are subjected to separate, component exposures selected for (1) good tone-scale reproduction of conti... | 08/27/1985 |
