Abstract: An image quality control apparatus controls quality of xerographic images formed by a xerographic imaging system onto a recording medium when at least one sensor which is operative to provide signals to the xerographic imaging system for quality control malfunctions. The image quality control apparatus includes a controller device in communication with the xerographic imaging system. The controller includes a data collection device, a determining device and an input generating device. The data collection device collects and processes sensor data received from the at least one sensor while the at least one sensor is operative. The determining device determines whether the at least one sensor malfunctions.
Type:
Grant
Filed:
May 22, 1998
Date of Patent:
February 1, 2000
Assignee:
Xerox Corporation
Inventors:
Lingappa K. Mestha, Sohail A. Dianat, Yao Rong Wang, Perry Y. Li, Michael J. Rice
Abstract: Conveyor rollers 1a, 1b which are driven by a rotary drive motor 9 are disposed in different locations in a direction in which a sheet is conveyed. The conveyor rollers 1a, 1b are arranged so as to be able to move in a direction intersecting the direction of conveyance by means of sheet shift means which are driven by shift motors 11a, 11b. Sheet sensors 13a, 13b are provided in the reference position for the side edge of the sheet. If the sheet sensor 13a (or 13b) does not detect the side edge of the sheet 2, the shift motors 11a, 11b are controlled in such a way that a conveyor roller 1a (or 1b) corresponding to the sheet sensor approaches the sheet side edge reference position. In contrast, if the sheet sensor detects the side edge of the sheet 2, the shift motors are controlled in such a way that the conveyor roller departs from the reference position.
Abstract: A multicolor liquid ink printer for printing unmottled, high quality images on sheets of plain paper. The multicolor liquid ink printer includes a flat, generally rectangular stationary platen having a first long side, a second long side, a first short end, a second short end, and a sheet supporting surface for supporting a sheet of plain paper. The multicolor liquid ink printer also includes a heating device for heating the stationary platen, and a sheet containing and feeding assembly for containing and feeding sheets of plain paper onto the sheet supporting surface of the stationary platen. Importantly, the multicolor liquid ink printer includes a bidirectionally movable sheet driving and printing assembly that is movable over and relative to the stationary platen and to a sheet being supported on the stationary platen.
Abstract: A method and apparatus for producing high quality toner images in an electrostatic printing machine. The method using the apparatus includes (a) (a) forming an initial developed toner image on a photoreceptor using a first toner image forming assembly including a charging device for uniformly charging the photoreceptor, and a development assembly, including charged toner solids having a single polarity, for image-wise applying a layer of the toner solids to the latent image to form an initial developed toner image; (b) refining the initial developed toner image using an air breakdown charging assembly, including a relatively large magnitude voltage biasing source and a nip forming roll coupled thereto, for image-wise recharging of the single polarity toner solids layer forming the initial developed toner image.
Abstract: A method for manufacturing precise complex three dimensional structures in which minute drops of both a product layer and a sacrificial layer are emitted from an acoustic device. The process is a two step process wherein first the three dimensional structure is built in layers which are composed of either a sacrificial layer or a product layer or some configuration of both. Once the structure has been completely built up, then the sacrificial layer is removed leaving only the complex three dimensional structure.
Abstract: A method of producing an improved thin film transistor structure is provided having no source/gate or drain/gate overlap. A laser-assisted doping technique is applied to fabricate such transistors. A radiation filter is employed, which is transparent to light at the photolithography wavelength, but reflective or opaque at the laser wavelength. Eliminating source/gate and drain/gate overlap significantly reduces or eliminates parasitic capacitance and feed-through voltage between source and gate. Short-channel a-Si:H thin film transistors may be obtained having high field effect mobilities. Improved pixel performance and pixel-to-pixel uniformity is provided.
Type:
Grant
Filed:
October 29, 1997
Date of Patent:
February 1, 2000
Assignee:
Xerox Corporation
Inventors:
Ping Mei, Rene A. Lujan, James B. Boyce, Christopher L. Chua, Michael G. Hack
Abstract: A method and apparatus for compressing a corpus of document images into a collective tokenized representation. Initially, documents in the corpus are individually compressed into a document tokenized format. A document image in the document tokenized format is represented using a symbol table and a table of positions. Each symbol in the symbol table is a shape in the original document image. The positions in the table of positions indicates where the symbols in the symbol table are placed to form the document image. Subsequently, the individual symbol tables of each document in the corpus are assembled to form clusters of similar shapes. These clusters are then analyzed to identify the degree of interrelationship between the symbols in the individual symbol tables. Individual document symbol tables with a large number of recurring symbols are grouped together. For each of the groups of symbol tables, a collective symbol table is computed.
Abstract: An electrophotographic imaging member comprising a charge generating layer comprising trigonal selenium particles and a charge transport layer, the charge transport layer includinga protonic acid or Lewis acid,a charge transporting small molecule,a film forming polymer, andpolyalkylene-block-polyethylene oxide.This imaging member may be fabricated using a suitable solvent for applying the charge transport layer.
Type:
Grant
Filed:
October 28, 1998
Date of Patent:
February 1, 2000
Assignee:
Xerox Corporation
Inventors:
Timothy J. Fuller, Markus R. Silvestri, Damodar M. Pai, John F. Yanus, Raymond K. Crandall, Samuel Kaplan, Karen S. Garland
Abstract: A method of producing an improved thin film transistor structure is provided having no source/gate or drain/gate overlap. A laser-assisted doping technique is applied to fabricate such transistors. A radiation filter is employed, which is transparent to light at the photolithography wavelength, but reflective or opaque at the laser wavelength. Eliminating source/gate and drain/gate overlap significantly reduces or eliminates parasitic capacitance and feed-through voltage between source and gate. Short-channel a-Si:H thin film transistors may be obtained having high field effect mobilities. Improved pixel performance and pixel-to-pixel uniformity is provided.
Type:
Grant
Filed:
October 29, 1997
Date of Patent:
February 1, 2000
Assignee:
Xerox Corporation
Inventors:
Ping Mei, Rene A. Lujan, James B. Boyce, Christopher L. Chua, Michael G. Hack
Abstract: Disclosed is a process which comprises reacting a polymer of the general formula ##STR1## or ##STR2## wherein x is an integer of 0 or 1, A is one of several specified groups, such as ##STR3## B is one of several specified groups, such as or mixtures thereof, and n is an integer representing the number of repeating monomer units, with a halomethylethyl ether, a hydrohalic acid, and acetic acid in the presence of a halogen-containing Lewis acid catalyst, thereby forming a halomethylated polymer.
Type:
Grant
Filed:
May 17, 1999
Date of Patent:
February 1, 2000
Assignee:
Xerox Corporation
Inventors:
Daniel A. Foucher, Nancy C. Stoffel, Roger T. Janezic, Thomas W. Smith, David J. Luca, Bidan Zhang
Abstract: A cleaning apparatus having a spots cleaning blade to remove residual agglomerations of particles from the imaging surface. The spots cleaning blade is made from a material that has a low coefficient of friction, low resilience and higher hardness than a standard spots blade. These properties enable the spots cleaning blade to provide a continuous slidable contact with the imaging surface to remove residual particles therefrom. Additionally, an electrically conductive surface can be added to the front or back surface of the blade to cause toner particles to be repelled from and cloud near the blade where they can be removed by a vacuum device or the like. The conductive surface may be direct negative, direct positive or A-C potential to provide the necessary repelling force.
Type:
Grant
Filed:
October 29, 1998
Date of Patent:
February 1, 2000
Assignee:
Xerox Corporation
Inventors:
Robert C. Sbert, Douglas A. Lundy, Norman L. Roof, Jr.
Abstract: A toner composition comprised of a polyester resin with hydrophobic end groups, colorant, optional wax, optional charge additive, and optional surface additives.
Type:
Grant
Filed:
May 24, 1999
Date of Patent:
January 25, 2000
Assignee:
Xerox Corporation
Inventors:
Guerino G. Sacripante, Marko D. Saban, Alan E. J. Toth, Michael L. Grande, J. Stephen Kittelberger
Abstract: An improved transparency sensor (10) uses Brewster's Law to detect the presence of sheets of transparency material (20). The sensor (10) includes a light emitting diode (LED) (12) and two photodiodes (14, 16) arranged to receive light reflected from the material (20). The LED (12) supplies incident light at an angle (.theta.) which is related to the refractive index of the transparency material (20) to be detected. A polarizing filter (18) is associated with one of the photodetectors (16) and is oriented to cut out substantially reflected polarized light entering that photodiode (16). Output signals from the photodetectors (14, 16) are processed in a comparator (40) which provides an output signal (42) indicating the presence or not of a transparency material (20).
Abstract: A development system is disclosed including a developer roll adapted for depositing developer material on an imaging surface having an electrostatic latent image thereon. The development system which includes a developer roll with a magnetic sleeve having a static magnetic field pattern for transporting developer material to a development zone. In operation the stationary magnetically patterned sleeve holds a thin well-defined blanket of magnetic developer on the sleeve surface. Magnetic assembly rotates and thereby generating a tangential magnetic field to move the developer blanket along the surface of sleeve; The developer blanket passes over zones on sleeve where developer material is picked up, self metering, mixing, blanket homoginization, tribo charging and developer transport occurs. The developer blanket moves to the development zone which is defined by a planar portion on the sleeve; parallel and adjacent to the imaging surface whereupon the blanket is compressed.
Abstract: A charge generating composition comprising: a hydroxygallium phthalocyanine an alkoxy-bridged metallophthalocyanine dimer, and a polymer matrix comprised of a reaction product copolymerized from reactants including a vinyl chloride monomer, a vinyl acetate monomer, and a hydroxyalkyl acrylate monomer.
Type:
Grant
Filed:
October 14, 1998
Date of Patent:
January 25, 2000
Assignee:
Xerox Corporation
Inventors:
Richard H. Nealey, Kenny T. T. Dinh, John G. Matta
Abstract: A simplified process for duplex printing on a simplex-only printing system in which plural page document duplex electronic print jobs generated with a duplex printing control signal are sent to be printed. If such duplex print jobs are sent to a duplex printer then they are printed normally without user interactive intervention.
Abstract: The present invention is a method and apparatus for simplifying the selection and manipulation of one or more graphical elements which overlap at at least one common point or region on a display, displaying the graphical elements in a separated manner while showing the relationship between such elements, and improving the ability to select one of a plurality of overlapping elements depicted on the display of a data processing system. The present invention finds particular use with well-known drawing and illustration software suitable for use on data processing systems.
Abstract: An electrostatographic reproduction machine including a movable photoconductive member having an image bearing surface; devices for forming a latent image electrostatically on the image bearing surface; a development unit including toner particles for developing the latent image to be transferred onto a sheet; a moving device for moving waste toner particles from the image bearing surface and from the development unit; and a waste developer material cartridge having a housing defining a surface area, a waste developer material chamber, and a waste developer material receiving opening for receiving waste developer material from the moving device, wherein the waste developer material cartridge housing has an accessible sealing device mounted over the receiving opening; and a label assembly reuseable as a sealing device for effectively resealing the accessibly-sealed waste developer material receiving opening during shipping of the cartridge.
Abstract: Meeting support objects for supporting meeting objectives for use in a freeform graphics system. Meeting support objects are representations of dynamic information that is used to support various common activities performed in meetings, such as decision making, assigning action items, agenda tracking, etc. Meeting support objects are defined by a domain object class. The domain object class defines attributes, a set of action rules and layouts. The attributes describe the information or data associated with the meeting support object. Further, the underlying attribute values represented by the icon may change, based on predefined spatial parameters, as the result of user actions performed on the icon (e.g. via a gesture) or upon the occurrence of a system event. The set of action rules map user actions and system events to operations that may be performed on the meeting support object. The layouts define how meeting support object information is displayed as an icon.
Type:
Grant
Filed:
January 12, 1998
Date of Patent:
January 25, 2000
Assignee:
Xerox Corporation
Inventors:
Thomas P. Moran, William J. van Melle, Patrick Chiu