Patents Assigned to Xerox
  • Patent number: 5560037
    Abstract: A data structure for use in hyphenation is created by including hyphen codes at the acceptable hyphenation points of words and then collapsing the words into a minimal state determinized FSM data structure. The transitions of the data structure are sorted so that a hyphen code that has alternatives is positioned before its alternatives. The data structure is then encoded for compactness. In searching with a word, if a mismatch occurs in the branch of the data structure that depends from a hyphen code, the search continues with its alternatives, because a match could be found in a branch depending from one of the alternatives. The data structure may be accessed with a hyphenated word to check hyphenation or spelling. It may be accessed with an unhyphenated word to retrieve its hyphenation points. It may be accessed with a number corresponding to a word to retrieve that word with its hyphenation points.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: September 24, 1996
    Assignee: Xerox Corporation
    Inventor: Ronald M. Kaplan
  • Patent number: 5559540
    Abstract: The invention is an apparatus and method for periodically applying a hydrophobic coating layer to a face of an ink jet printing head to prevent droplets of ink from clogging nozzles of the printing head. An ink jet printer embodying the invention includes a hydrophobic material applicator that moves relative to the printing head to deposit hydrophobic material on the face of the ink jet printing head. The applicator may be a wiper blade or cylinder made from a hydrophobic material or embedded with a hydrophobic material, wherein the applicator contacts the face of the printing head during relative movement to transfer hydrophobic material to the printing head. The applicator may also be a spray head that sprays hydrophobic material onto the face of the printing head during relative movement.
    Type: Grant
    Filed: July 12, 1994
    Date of Patent: September 24, 1996
    Assignee: Xerox Corporation
    Inventor: Vincent A. Burolla
  • Patent number: 5559784
    Abstract: An optical information reproducing apparatus having an optical recording medium in which information is recorded in a state that it is optically reproduced, and an optical head for reproducing the recorded information from the recording medium while moving relatively to the recording medium. In the apparatus, images are formed on the recording medium by two laser beams emitted from a light source of the optical head, and the difference between the two laser beams transmitted through the recording medium or reflected by the recording medium is detected.
    Type: Grant
    Filed: March 25, 1994
    Date of Patent: September 24, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Takeshi Ota
  • Patent number: 5558946
    Abstract: The improved multilayered thin ferroelectric film includes a substrate, a first polycrystalline ferroelectric layer that is formed on the substrate, that has high density and a refractive index of the single-crystal grade but whose surface is not optically smooth, and a second polycrystalline ferroelectric layer that is formed on the first polycrystalline ferroelectric layer, that has a comparatively low density, that has a lower refractive index than the single crystal but which has an optically smooth surface.
    Type: Grant
    Filed: October 4, 1993
    Date of Patent: September 24, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Keiichi Nishimoto
  • Patent number: 5557720
    Abstract: Some document languages such as the Standard Generalized Markup Language (SGML) represent documents as trees with each node of the tree labelled with a tag and each node's immediate descendants taken in order having tags that satisfy a production corresponding to the parent's tag. Thus, a document is represented as a complete parse tree satisfying the production rules of a grammar. To simplify maintaining a valid document/parse tree at all stages, an efficient check is made whether a document is valid or can be extended to a valid document and furthermore to show how a document could be changed to be valid. A document can be extended to a valid document if is equal to a valid document with possibly some nodes deleted. External (leaf) nodes can just be deleted. Internal nodes are deleted by replacing the arc from the parent with multiple arcs (in the same order) from the parent to each of the children of the deleted node.
    Type: Grant
    Filed: September 8, 1994
    Date of Patent: September 17, 1996
    Assignee: Xerox Corporation
    Inventors: Allen L. Brown, Jr., Sidney W. Marshall
  • Patent number: 5557794
    Abstract: A data management system in which a plurality of data each data comprising a set of three elements: a data name, a data body and a data retrieving keyword group whose content is not so described that the system is able to handle hierarchically and logically differentiating it and display areas of a data retrieval/display window or an editing window are arranged to manage data based on the above three sets. A data name can be automatically set as a retrieval key at the time of data editing. The system can handle a title or an index attached to each data of a data base, a character string corresponding to the title or index or a retrieval keyword as same with other data or an independent accessible manner. Further, the system creates another display area different in size from a display area for display of the retrieved data to display the same data as displayed on the display area for the retrieved data.
    Type: Grant
    Filed: April 9, 1995
    Date of Patent: September 17, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshifumi Matsunaga, Tadanobu Miyauchi, Juhei Nakagaki
  • Patent number: 5557393
    Abstract: An electrostatographic imaging process includes forming an electrostatic latent image on an image forming device, developing the electrostatic latent image on the image forming device with at least one developer containing carrier particles and a blend of two or more compatible toner compositions, and transferring the toner image to a receiving substrate and fixing it thereto. Among the compatible toner compositions that may be selected are toner compositions having blend compatibility components coated on an external surface of the toner particles and particulate toner compositions containing therein blend compatibility components or passivated pigments. Electrostatographic imaging devices, including a tri-level imaging device and a hybrid scavengeless development imaging device, are also provided for carrying out the described process.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: September 17, 1996
    Assignee: Xerox Corporation
    Inventors: Nancy B. Goodman, Richard P. Germain, Paul C. Julien, Susan J. Kremer, Robert J. Gruber
  • Patent number: 5557787
    Abstract: A logical structure retaining device retains a corresponding relationship between heading information and table data, such as attributes used to search a data base and data obtained by the search. A table form retaining device retains one or plural sets of parameters that determine respective table forms. The parameters can be edited by a table form editing device. A table generating device generates a table by receiving information including the corresponding relationship between the heading information and the table data, referring to the parameters of the table form retaining device, calling, if necessary, a parameter designating device to input parameter values, and generating row heading items, column heading items and data items based on the above information.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: September 17, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kil-Ho Shin, Akira Suzuki
  • Patent number: 5557378
    Abstract: A Liquid Immersion Development, LID, reproduction machine having a moving liquid toner image carrying surface, includes an excess carrier liquid removing apparatus. The excess carrier liquid removing apparatus includes a housing defining a chamber, and an opening through the housing into the chamber for mounting against the liquid toner image carrying surface. The excess carrier liquid removing apparatus also includes a roller mounted rotatably to the housing and within the chamber for forming an image processing nip gap, that has an image entrance side and an image exit side, with the liquid toner image carrying surface.
    Type: Grant
    Filed: August 25, 1995
    Date of Patent: September 17, 1996
    Assignee: Xerox Corporation
    Inventors: Christian O. Abreu, Shyshung S. Hwang
  • Patent number: 5557367
    Abstract: A method of scheduling a job in an imaging system includes detecting criteria of the job, determining applicable constraints based upon one or more of the criteria, inputs entered into the imaging system and/or operating the imaging system to output the job such that the constraints are satisfied, thereby maximizing output. Each job includes a plurality of images to be processed by the imaging system, which includes at least one imaging device. As a result, the scheduling of jobs is carried out in an effective and efficient manner.
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: September 17, 1996
    Assignee: Xerox Corporation
    Inventors: Ming Yang, Injae Choi, Tsai C. Soong
  • Patent number: 5556967
    Abstract: Hydroxygallium phthalocyanine crystals are produced by reacting a gallium trihalide with phthalonitrile or diiminoisoindoline in a halogenated aromatic hydrocarbon solvent, treating the resulting halogenated gallium phthalocyanine with an amide solvent, and hydrolyzing the halogenated gallium phthalocyanine. The photoreceptor exhibits stabilized electrophotographic characteristics.
    Type: Grant
    Filed: October 14, 1994
    Date of Patent: September 17, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Katsumi Nukada, Katsumi Daimon, Yasuo Sakaguchi, Masakazu Iijima
  • Patent number: 5557689
    Abstract: A method for reducing an image of a character or word string to one or more one dimensional signals, including the steps of determining page orientation, isolating character strings from adjacent character strings, establishing a set of references with respect to which measurements about the character string may be made, and deriving a plurality of measurements with respect to the references in terms of one dimensional signal, amenable to identification processing techniques.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: September 17, 1996
    Assignee: Xerox Corporation
    Inventors: Daniel P. Huttenlocher, Michael J. Hopcroft
  • Patent number: 5557429
    Abstract: An image signal processing apparatus for converting an image data signal input by an image input terminal into another image data signal suitable for an image output terminal. In the apparatus, a quantity of noise of a spatial frequency characteristic difficult to visually perceive is generated in accordance with a level of the input image data signal, and the noise generated is superposed on the input image data signal. In handling a color image data signal, the noise is superposed on the color image data signal in a regional color space difficult to visually perceive.
    Type: Grant
    Filed: October 19, 1993
    Date of Patent: September 17, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Yoshitsugu Hirose
  • Patent number: 5556732
    Abstract: A process for preparing low fix temperature toner resin mixture comprising melt blending a resin mixture comprised of a first polyester resin with a low gloss value, and a second polyester resin with a high gloss value, to form a toner resin mixture having an intermediate gloss value.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: September 17, 1996
    Assignee: Xerox Corporation
    Inventor: Che C. Chow
  • Patent number: 5556727
    Abstract: Toners comprised of a cyan toner, a magenta toner, a yellow toner, and an optional black toner, each of said toners being comprised of resin and pigment; and wherein the pigment for the cyan toner is a .beta. or beta type copper phthalocyanine, the pigment for the magenta toner is a xanthene silicomolybdic acid salt of Rhodamine 6G basic dye, the pigment for the yellow toner is a diazo benzidine, and the pigment for the black toner is carbon black.
    Type: Grant
    Filed: October 12, 1995
    Date of Patent: September 17, 1996
    Assignee: Xerox Corporation
    Inventors: Roger N. Ciccarelli, Jacques C. Bertrand, Thomas R. Pickering, Denise R. Bayley
  • Patent number: 5556729
    Abstract: An electrophotographic photoreceptor comprising: an electrically conductive substrate, a charge injection blocking layer formed on said electrically conductive substrate, a photoconductive layer comprising a single layer formed on said charge injection blocking layer, said photoconductive layer comprising amorphous silicon containing boron, a positive hole capturing layer formed on said photoconductive layer, said positive hole capturing layer being selected from the group comprising amorphous silicon containing less than 50 ppm boron and amorphous silicon being substantially composed of hydrogen and silicon atoms, and a surface layer formed on said positive hole capturing layer. The boron concentration contained in said photoconductive layer is 0.01-1000 ppm. The surface layer is formed by amorphous silicon nitride, amorphous silicon oxide, amorphous silicon carbide or amorphous carbon as a main body. The charge injection blocking layer has amorphous silicon as a main body and contains a group V element.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: September 17, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yuzuru Fukuda, Tsuyoshi Ohta, Masato Ono, Taketoshi Higashi, Shigeru Yagi
  • Patent number: 5557795
    Abstract: A control system for pipelined image processing emulates a multi-tasking environment using a single tasking application. A number of predefined image processing tasks are provided in a library. When a host application needs a processed image from an image source, the host application creates a pipeline of initialized instantiations of one or more of the tasks from the library. When the host application invokes the pipeline, the first data request for the heater of the image travels upstream in a first channel. The processed image header is returned down the first channel. Then a data request for scanlines of image data is sent upstream in a second data channel. The data request ripples upstreamwardly to the upstream-most instantiation of one of the tasks from the task library. The upstream-most instantiation of a task obtains a scan line from an image data source and returns it downstreamwardly to the host application in the second channel.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: September 17, 1996
    Assignee: Xerox Corporation
    Inventor: Dennis L. Venable
  • Patent number: 5557534
    Abstract: Array circuitry formed at a surface of a substrate includes a first conductive layer with M scan lines, a second conductive layer with N data lines, and cell circuitry for a region in which the mth scan line and the nth data line cross. The cell circuitry includes a component with a data lead for receiving signals from or providing signals to the nth data line. A first semiconductor layer of the cell circuitry includes a first line with a channel between a connecting point to the nth data line and a connecting point to the component's data lead. A second semiconductor layer includes a second line extending from a connecting point to the mth scan line and crossing the first line at the channel. The first and second conductive layers and the cell circuitry are formed with electrical connections at the connecting points so that signals on the mth scan line control conductivity of the first line between the nth data line and the data lead. The semiconductor layers can be polysilicon.
    Type: Grant
    Filed: January 3, 1995
    Date of Patent: September 17, 1996
    Assignee: Xerox Corporation
    Inventor: I-Wei Wu
  • Patent number: 5557715
    Abstract: Image information and area information associated therewith are connected to each other to produce connected image information. Memory addresses are generated to allow the connected image information to be stored into a memory through coordinates X and Y. The connected image information is rotated based on the memory addresses thus generated. The rotated image information is combined with the image information in the memory.
    Type: Grant
    Filed: May 19, 1994
    Date of Patent: September 17, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Yoshio Ichiyanagi
  • Patent number: D373763
    Type: Grant
    Filed: March 10, 1995
    Date of Patent: September 17, 1996
    Assignee: Xerox Corporation
    Inventor: Michael E. Daley