Patents Assigned to Xerox
  • Document processing system with enable feature
    Patent number: 5966718
    Abstract: In a document processing system which performs document processing such as edit and display for document data, a plurality of preset document roles are stored in role definition section, a plurality of preset document processing scenes are stored in scene definition section, information indicating whether or not document processing is enabled corresponding to a pair of a role and a scene is stored in operation definition section, and event processing section gets the corresponding role from the role definition section and the corresponding scene from the scene definition section based on document processing information entered through an input section and gets information indicating whether or not the corresponding document processing such as edit or display is enabled from the operation definition section.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: October 12, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Takao Shibata
  • Composite cleaner seal for electrophotographic machines
    Patent number: 5966565
    Abstract: A cleaning seal with a soft cleaning seal tip provides a seal between the cleaning housing and the photoconductive member in an electrophotographic machine. The cleaning seal is made of a relatively stiff material so that the cleaning seal can collect and support the toner removed from the photoconductive member. In the absence of the soft cleaning seal tip, the relatively stiff material of the cleaning seal contacting the photoconductive member excessively scratches the photoconductive member. The soft cleaning seal tip solves this problem by providing a relatively soft surface on the photoconductive member, resulting in fewer scratches on the photoconductive member. The composite cleaning seal provides the sufficient force to remove and support the toner removed from the photoconductive member while cushioning the force of the relatively stiff cleaning seal against the photoconductive member.
    Type: Grant
    Filed: October 13, 1998
    Date of Patent: October 12, 1999
    Assignee: Xerox Corporation
    Inventors: Robert S. Pozniakas, Douglas W. Sass
  • Image-wise toner layer charging for image development
    Patent number: 5966570
    Abstract: An image development method and apparatus, wherein a support member is provided with a layer of marking material thereon, and an electrostatic latent image is created in the layer of marking material via image-wise charging of the layer of marking material. A selectively controllable charging device for directing a charge stream toward the support member having the layer of marking material coated thereon. The image-wise charge stream corresponds to the latent image, which, in turn, leads to image-wise charging of the toner layer, such that the toner layer itself becomes the latent image carrier. The latent image carrying toner layer is subsequently developed and transferred to a copy substrate to produce an output document.
    Type: Grant
    Filed: January 8, 1998
    Date of Patent: October 12, 1999
    Assignee: Xerox Corporation
    Inventors: Henry R. Till, Stewart W. Volkers
  • Wax processes
    Patent number: 5965316
    Abstract: A process for the preparation of toner comprising(i) aggregating a colorant dispersion with an encapsulated wax;(ii) coalescing or fusing the aggregates generated; and optionally(iii) isolating, washing, and drying the toner.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: October 12, 1999
    Assignee: Xerox Corporation
    Inventors: Grazyna E. Kmiecik-Lawrynowicz, Chieh-Min Cheng
  • Photoconductor belt seam detection
    Patent number: 5966572
    Abstract: An electrophotographic printing machine that has a photoconductive belt with a skewed seam thereon. The position of the skewed seam is detected by a pair of seam detection devices. The seam detection devices are spaced from one another and adapted to transmit a pair of signals with the signals having a time interval therebetween. These signals are inputted to a detection circuit and, if the time interval between signals is within a preselected tolerance, the detection circuit generates a seam indication signal. In this way, scratches on the photoconductive surface may be discriminated from the seam.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: October 12, 1999
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Edward F. Grabowski, Bing R. Hsieh, Robert C. U. Yu, Anthony M. Horgan, Richard L. Post, Donald C. VonHoene
  • Apparatus to clean ink and coating from contact cleaning rolls
    Patent number: 5964007
    Abstract: A method and cleaning system to clean ink and coating from contact cleaner rolls. The contact cleaning rolls are located on a turret and as one contact cleaning roll is indexed sequentially out of contact with the imaging surface and into contact with a porous material another contact cleaning roll is indexed into contact with the imaging surface simultaneously. The porous material has a non-alcoholic solvent applied to clean the contact cleaning roll surface upon contact. The components found to create an efficient cleaning solvent for the CCRs include aliphatic ketones and alkylene halides. The aliphatic ketones are alkyl ketones containing from about 1 to 25 carbon atoms (with a preferred range of about 1 to about 10 carbon atoms). The aliphatic ketones contain solvents such as methyl ethyl ketone (i.e. the preferred solvent), methyl ketone, ethyl ketone, propyl ketone and butyl ketone.
    Type: Grant
    Filed: October 4, 1996
    Date of Patent: October 12, 1999
    Assignee: Xerox Corporation
    Inventors: Carl A. Wisniewski, Gary W. Smallman, Francis J. Wieloch
  • Method and system for processing and rendering object oriented neutral image data
    Patent number: 5966462
    Abstract: A system and method processes object oriented image data by initially parsing the object oriented image data into non-neutral image data and neutral image data. A second parser circuit parses the neutral image data into black image data, grey image data, and white image data. A neutral processing circuit processes the black image data, grey image data, and the white image data. The system also classifies object oriented image data to be rendered by an object oriented rendering system. To perform the classification, the object oriented image data to be rendered is received and classified and assigned as one of a plurality of possible first level object types. The process further classifies and assigns, to the object oriented image data to be rendered, one of a plurality of possible second level object types related to the first level object type assigned to the object to be rendered.
    Type: Grant
    Filed: June 19, 1997
    Date of Patent: October 12, 1999
    Assignee: Xerox Corporation
    Inventors: Stephen F. Linder, Craig H. Mallery
  • System for compressing and decompressing binary representations of dithered images
    Patent number: 5966467
    Abstract: A method for compression and decompression of dithered images is disclosed. Logical units (tiles) of the binary representation are classified into equivalence classes which are then compressed. Each equivalence class represents tiles having similar gray levels (i.e. the same number of black pixels), but which may have different sequences of black and white pixels. Each equivalence class has associated with it a predefined set of rendering exemplars. Each of the exemplars has a similar gray level. Upon decompression, each instance of an equivalence class takes on the value of one of the rendering exemplars which is selected pseudo-randomly.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: October 12, 1999
    Assignee: Xerox Corporation
    Inventor: Daniel Davies
  • One-component developer
    Patent number: 5965312
    Abstract: A one-component developer comprising an external additive, and toner particles containing a binder resin and a colorant, wherein the external additive contains a titanium compound obtained by the reaction of TiO(OH).sub.2 and a silane compound, and an image forming method using the one-component developer are disclosed. The one-component developer and the image forming method provide excellent flow and a narrow charge distribution, can reduce fluctuation of the charge property due to the environmental change, and can thus form a high-quality image without fogging and the damage to a latent image retainer by filming can be prevented.
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: October 12, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hiroshi Nakazawa, Koutarou Yoshihara, Etsuo Tominaga, Hiroe Okuyama, Masahiro Uchida, Chiaki Suzuki, Yoshifumi Iida, Toyofumi Inoue, Hiroyoshi Okuno
  • On-line learning for neural net-based character recognition systems
    Patent number: 5966460
    Abstract: A neural network based improving the performance of an omni-font classifier by using recognized characters for additional training is presented. The invention applies the outputs of the hidden layer nodes of the neural net as the feature vector. Characters that are recognized with high confidence are used to dynamically train a secondary classifier. After the secondary classifier is trained, it is combined with the original main classifier. The invention can re-adjust the partition or boundary of feature space, based on on-line learning, by utilizing the secondary classifier data to form an alternative partition location. The new partition can be referred to when a character conflict exists during character recognition.
    Type: Grant
    Filed: March 3, 1997
    Date of Patent: October 12, 1999
    Assignee: Xerox Corporation
    Inventors: Gilbert B. Porter, III, Zhigang Fan, Frederick J. Roberts, Jr.
  • Ink composition and image recording method
    Patent number: 5962552
    Abstract: Described are an ink composition comprising water, a colorant and acrylic silicone resin particles having alkoxysilyl groups; and an image recording method comprising discharging the droplet of an ink composition from a recording head to record an image on a substrate, wherein an ink composition comprising water, a colorant and acrylic silicone resin particles having alkoxysilyl groups is used as the ink composition. According to the present invention, 1) blotting of the ink composition on the substrate can be prevented, 2) an image which has water resistance and has a markedly high image density can be obtained, 3) an image does not become sticky even under a high environmental temperature, and 4) there is no problem in safety.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: October 5, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takeshi Mikami, Yuzuru Fukuda
  • Area coverage sensor calibration and algorithm for seam detection noise eliminator on a seamed photoreceptor
    Patent number: 5963761
    Abstract: An apparatus and method for eliminating random noise and calibrating a seam detection sensor in an electrophotographic printing machine. When the detected centerline remains within the tolerance window the algorithm proceeds as normal. In most cases, however, the center line is shifted outside the tolerance window., either from 2 to -X or +X to N-1. When the centerline falls within either of these two ranges, the algorithm recognizes this fact and assumes that a random noise condition has occurred. It then proceeds to take the previous centerline (C) and add the current photoreceptor belt length to it. This, theoretically, should be exactly where the centerline should have been in the absence of noise. If this condition continues for three successive belt revolutions and the machine completes the job it was running, the algorithm will force the machine to search for the seam at the next cycle up.
    Type: Grant
    Filed: March 22, 1999
    Date of Patent: October 5, 1999
    Assignee: Xerox Corporation
    Inventors: Roger W. Budnik, Ralph A. Shoemaker
  • Sediment free toner processes
    Patent number: 5962178
    Abstract: A process for the preparation of toner including(i) aggregating a colorant and a latex emulsion containing a resin, reactive surfactant, and an ionic surfactant to form toner sized aggregates,(ii) coalescing or fusing said aggregates; and optionally(iii) isolating the toner generated, washing, and drying the toner.
    Type: Grant
    Filed: January 9, 1998
    Date of Patent: October 5, 1999
    Assignee: Xerox Corporation
    Inventor: Chieh-Min Cheng
  • Toner processes
    Patent number: 5962179
    Abstract: A process for the preparation of toner comprising mixing a colorant dispersion in water, which dispersion is comprised of a colorant and an ionic surfactant with a resin latex; heating the resulting flocculent mixture with stirring at a temperature of from about 25.degree. C. to about 1.degree. C. below the glass transition temperature (Tg) of the latex resin to effect formation of toner sized aggregates; heating the resulting aggregate suspension in the presence of additional anionic surfactant, and which heating is at a temperature of from about 10.degree. C. to about 55.degree. C. above the Tg of the resin; cooling; adding a base component to the resulting slurry; filtering; and thereafter drying said toner.
    Type: Grant
    Filed: November 13, 1998
    Date of Patent: October 5, 1999
    Assignee: Xerox Corporation
    Inventors: Enno E. Agur, Francisco E. Torres, T. Hwee Ng, Allan K. Chen, Arthur Helbrecht, Maria N. V. McDougall, Richard P. N. Veregin
  • Method and device for developing an electrostatic latent image based on toner amount and image formation system using the developing device
    Patent number: 5963765
    Abstract: A developing method for an image formation system includes the steps of supplying a toner and developing an electrostatic latent image formed on a latent image support of the image formation system with the toner for visualization. A toner amount of a solid area T(g/m.sup.2) has a maximum toner amount per unit area on a recording medium and satisfies the following expression:1.ltoreq.T/a.ltoreq.1.2wherein a=(4.pi./3).multidot.(dt/2).sup.3 .multidot..rho.t({(3).sup.1/2 .multidot.dt.sup.2 /2} (g/m.sup.2), where dt is a toner volume center diameter (m) and st is a toner density (g/m.sup.3). A developing device for developing an electrostatic latent image includes toner amount regulation means for regulating a toner amount that satisfies the above expression.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: October 5, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kei Hirata, Tomio Ohnuki, Ikutaroh Nagatsuka, Hiroo Soga
  • Multiple wavelength, surface emitting laser with broad bandwidth distributed Bragg reflectors
    Patent number: 5963568
    Abstract: A multiple wavelength surface emitting laser has a first and second broad bandwidth distributed Bragg reflector (DBR) which reflect light at multiple wavelengths. The surface emitting laser structure comprises at least two cavities with each cavity containing one or more active layers for respectively emitting light at different wavelengths. In a preferred embodiment for a dual wavelength surface emitting laser, a first cavity contains a first active layer for emitting light of a first wavelength and a second cavity contains the first and second active layers and emits only light of the second longer wavelength. The second layer has been eliminated in the first cavity by etching before completing the epitaxial growth.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: October 5, 1999
    Assignee: Xerox Corporation
    Inventor: Thomas L. Paoli
  • Image recording apparatus with an array light source
    Patent number: 5963242
    Abstract: An image recording apparatus has an array light source having a plurality of light-emitting elements arrayed in a predetermined density; a photosensitive member exposed to light beams emitted from the plural light-emitting elements so that images are recorded by fixing a traveling path of the light beams from the plural light-emitting elements to the photosensitive member and by moving the photosensitive member relative to the array light source; a beam-converging unit which intercrosses a bundle of the light beams emitted from the light-emitting elements onto a beam-conversion point; and an focusing unit disposed between the beam-converging unit and the photosensitive member, which images the light beams emitted from the plural of light-emitting elements and intercrossed by the beam-converging unit onto the photosensitive member.
    Type: Grant
    Filed: October 29, 1996
    Date of Patent: October 5, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hideo Nakayama, Hiromi Otoma, Nobuaki Ueki, Yasuji Seko, Akemi Murakami, Mario Fuse, Masao Ito, Izumi Iwasa
  • Optimal reconstruction of tone reproduction curve
    Patent number: 5963244
    Abstract: A method of machine control including the recreation of a tone reproduction curve by providing a look up table. The look up table incorporates a covariance matrix of elements containing n tone reproduction samples. A matrix multiplier responds to sensed developed patch samples and to the look up table to reproduce a complete tone reproduction curve. A control reacts to the reproduced tone reproduction curve to adjust machine quality.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: October 5, 1999
    Assignee: Xerox Corporation
    Inventors: Lingappa K. Mestha, Yao Rong Wang, Sohail A. Dianat, Pramod P. Khargonekar, Daniel E. Koditschek, Eric Jackson, Tracy E. Thieret
  • Printing system
    Patent number: 5963770
    Abstract: A printing system including three print engines. One of the print engines is non-operational while the other two print engines are operational. The non-operational print engine is redundant and only actuated in the event that one of the operational print engines develops a malfunction causing it to be non-operational. At that time, the previously non-operational print engine becomes operational. In this way, two print engines are continually in operation with one print engine being non-operational. This printing system significantly improves reliability and minimizes maintenance requirements.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: October 5, 1999
    Assignee: Xerox Corporation
    Inventor: Paul W. Eakin
  • Paper guide for high speed document reproduction
    Patent number: H1805
    Abstract: This invention discloses a method and apparatus for properly placing copy sheets from a high speed copy machine into an exit tray. The invention utilizes a variable speed motor to control the rollers which reside at the end of the paper path. One or more paper guides mounted to the drive rollers, enable the motor to operate over a wide range of speeds, yet still work efficiently. The motor accelerates to its highest speed as the copy sheet enters the nip between the drive and idler rollers, and is decelerated to its slowest speed as the trailing edge of the copy sheet exits the nip. The trailing edge of the copy sheet then moves off of the roller and onto the paper guide. The speed of the motor can then be increased without having to wait for the copy sheet to move into the output area. This substantially reduces the period of time required to reproduce copies.
    Type: Grant
    Filed: June 17, 1996
    Date of Patent: October 5, 1999
    Assignee: Xerox Corporation
    Inventors: Jason P. Rider, Russell C. Rackett, Joseph S. Vetromile, Geoffrey C. Williams