Abstract: A toner composed of binder resin and carbon black particles has a volume-average particle diameter (D.sub.50) of 2.0 to 9.0 microns and a volume-average particle size distribution index (GSDv) of 1.25 or less. Carbon black particles adhering to the surfaces of toner particles have an absorption of 0.250 or less for ultraviolet radiation having a wavelength of 600 nm. Disclosed also are a method for producing the toner, a developer for developing an electrostatic latent image and a method in which the developer is used for forming animage.
Abstract: A photoreceptor including: (a) a substrate; (b) a charge generating layer; and (c) a charge transport layer including a charge transport material and a rotaxane material.
Type:
Grant
Filed:
January 27, 2000
Date of Patent:
August 1, 2000
Assignee:
Xerox Corporation
Inventors:
Pudupadi R. Sundararajan, Dasarao K. Murti, Peter G. Odell, Gordon K. Hamer
Abstract: A moisturizing and decurling apparatus, mountable immediately downstream of a fusing apparatus in an electrostatographic reproduction machine, is provided for removing any curl from a copy sheet in order to produce a high quality toner particle image of an original image on a stable flat copy sheet. The moisturizing and decurling apparatus includes a moisturizing device for applying moisture onto a copy sheet within a critical period of time after the copy sheet passes through the fusing apparatus, and a constraining and stabilizing assembly for constraining and stabilizing the copy sheet into a desired flat condition before the melted toner particles cool below a set critical temperature. The constraining and stabilizing assembly includes a flat vacuum belt assembly for holding flat and transporting the copy sheet before the melted toner particles cool below the set critical temperature.
Abstract: In the formation of a multicolor image for generating a color print by repeating operation for transferring on an intermediate transfer member every color after one color toner image is formed on a photoreceptor drum, when an image of each color is written on the photoconductor, the image writing start position of each color is differentiated in a process direction of the photoconductor on the basis of a position reference mark on the intermediate transfer member detected by a sensor. This prevents a defect on the photoconductor from being enlarged and visually conspicuous.
Abstract: A system and method for a graphical keyboard that benefits from the expressive power and intuitive ease of use associated with pen strokes and gestures, yet does not require complex character-recognition software. The graphical keyboard responds differently to different kinds of pen strokes. For example, lowercase "a" is entered by tapping a stylus on the "a" key of the graphical keyboard. Uppercase "A" is entered by an upward stroke initiated over the "a" key. Likewise, by stroking in other directions, a user can express other modifiers to the basic character, such as "control", "alt", "command," etc. Also, strokes in distinct directions can be used to express space, backspace, delete, and return characters, for example. Multiple strokes can be applied in sequence to a single key to express multiple modifiers. Visual feedback of pen strokes can be provided in the form of marks made by the pen.
Type:
Grant
Filed:
May 17, 1995
Date of Patent:
July 25, 2000
Assignee:
Xerox Corporation
Inventors:
William A. S. Buxton, Gordon P. Kurtenbach
Abstract: A process for the preparation of polymers which comprises generating a solution of water and polyvinyl alcohol with acetate groups; adding thereto a mixture of an alkali metal iodide and iodine; adding thereto initiator, and optional crosslinking agent; adding monomer, a mixture of monomers, or a monomer/polymer mixture; homogenizing, and polymerizing; and wherein there is formed an iodide/iodine/acetate complex prior to said polymerizing.
Type:
Grant
Filed:
February 2, 1998
Date of Patent:
July 25, 2000
Assignee:
Xerox Corporation
Inventors:
Thomas E. Enright, George Liebermann, Scott M. Silence, K. Derek Henderson, Hadi K. Mahabadi, Bernard A. Kelly
Abstract: An electrophotographic printing machine in which an electrostatic latent image recorded on an imaging surface is developed with toner particles to form a visible image thereof, including a hopper containing a supply of carrier material; a first developer unit for developing the electrostatic latent image with toner particles of a first color; a second developer unit for developing the electrostatic latent image with toner particles of a second color; conduit for connecting the first and second developer unit to the hopper so that carrier material flows to the first and second developer unit; a first feeding system, in communication with the conduit, for regulating the amount of carrier to the first developer unit; a second feeding system in communication with the conduit, for regulating the amount of carrier to the second developer unit, and a controller for controlling the regulation rate of the first and the second feeding system independently.
Abstract: A method and mechanism are provided for supporting and stacking a liquid ink printed sheet moving along an in-track path and direction in a liquid ink printing system and having a flat, cross-track dimension "D1" defined by a first edge and a second and opposite edge of such sheet. The mechanism for the method includes an output tray defining and providing a stacking surface for holding the liquid ink printed sheet in a stack; and a first member having an edge supporting portion and an edge guiding portion for supporting and guiding the first edge of the liquid ink printed sheet, the first member being mounted at a first position having a first desired height distance above the stacking surface, and the first member extending along the in-track path and direction.
Abstract: The two symmetrical halves of halftone shapes that have a central axis of symmetry are selectively intensity modulated for accenting human readable information that is embedded in halftone patterns that are composed of halftone cells having fill patterns conforming to such shapes. This human readable information is defined by clustering these halftone fill patterns so that their accented portions visually blend to form alphanumeric character shapes.
Abstract: On an embedded device with a web server, pages are marked as having non-cacheable HTML portions and cacheable graphics portions. Marking the HTML portion as non-cacheable allows for the retrieval of a web page containing the latest status information without retrieving the graphics images. A refresh function is provided that allows for the comparing of non-cached portion time stamps with the stamps of the page on the web server. When the time stamp of the page on the web server is more current than the time stamp of the non-cached portion, the non-cacheable portion of the web page is retrieved from the web server. Retrieving the non-cacheable HTML portion from the web site without retrieving the cached portion reduces the amount of time needed to refresh the display image. A timer may be employed to refresh the web page at predetermined intervals, while using the current URL or the history list of the browser to reach the desired web site and retrieve the current status of the embedded device.
Abstract: Input image data is stored in a register matrix of 7.times.7 in a successive manner. A pattern detecting section detects a black- or white-pixel connective pattern of the reference pixels of a marked pixel. When the reference pixel pattern is a black-pixel connective pattern of 1:n (n=1, 2, 3, . . . ), an enlarging/smoothing processor section interpolates a part of the enlarged marked pixel with black pixels. When it is a white-pixel connective pattern of 1:n (n=1, 2, 3, . . . ), the enlarging/smoothing processor erases a part of the enlarged marked pixel. As a result, the oblique line can be smoothed. The line that is made thick by the smoothing process can be shaped into a thin line. Thus, a high-quality image can be produced.
Abstract: A micro-machined movable microlens assembly is formed on undoped or pure a semiconductor substrate. The movable microlens assemblies are to be actuated using force generators which cause various mechanical degrees of freedom depending upon the type of stage suspension and actuation used.
Type:
Grant
Filed:
December 11, 1998
Date of Patent:
July 18, 2000
Assignee:
Xerox Corporation
Inventors:
Decai Sun, Eric Peeters, Ross D. Bringans, Patrick Y. Maeda
Abstract: An apparatus and method for degassing liquid ink utilizes microwaves. An ink degassing unit includes a microwave heater that heats the liquid ink in an ink line passing through the microwave heater. The liquid ink is heated to supersaturate the ink with air and a vacuum chamber of the ink degassing unit is disposed along the ink line and evacuates the ink to pull the air out of the ink. A control system selectively couples the ink degassing unit onto one or more of a plurality of ink supply lines so that only supply lines of ink currently being used for printing are degassed. The control system selectively diverts at least one ink supply line connected to a printhead through the ink degassing unit.
Abstract: A variable fluid flow valve is disclosed. The valve can be batch fabricated in two dimensional valve arrays, with all valves in the array being controlled in parallel to achieve high flow rates without increasing response time. Typically, each valve includes a valve housing having an aperture plate defining an elongated aperture therethrough, and an opposing plate positioned in spaced apart relationship to the aperture plate. In one embodiment a flexible film or strip is attached at its first end to the aperture plate and at its second end to the opposing plate. In another embodiment of the invention, the flexible film is attached at only one end and is free to move at the other end. In both types of valves, valve action is provided by using electrodes to variably move the flexible film from an aperture blocking to an aperture non-blocking position. The flexible film may be moved in a continuously variable manner or a discretely variable manner, depending upon the electrode configuration.
Type:
Grant
Filed:
January 8, 1998
Date of Patent:
July 18, 2000
Assignee:
Xerox Corporation
Inventors:
David K. Biegelsen, Warren B. Jackson, Patrick C. P. Cheung, Eric Peeters
Abstract: A process for etching III-V nitride and III-V nitride alloy materials first implants selected regions of the materials with ions and then selectively etches the implanted regions in an etching liquid, such as an aqueous base. The etch depth is controlled by the energy, mass and dose of the implanted ions.
Type:
Grant
Filed:
May 26, 1998
Date of Patent:
July 18, 2000
Assignee:
Xerox Corporation
Inventors:
Jack Walker, Werner Goetz, Noble M. Johnson, David P. Bour, Thomas L. Paoli
Abstract: A liquid ink printer, depositing ink drops to form an image, including a pagewidth printbar, movable to print a complete image when defective nozzles of the printbar are identified. A positioning device, coupled to the pagewidth printbar, positions the printbar at a plurality of discrete locations, to move a functioning nozzle to the location in the image where the defective nozzle should deposit drops of ink. Defective nozzles are identified by the printer control mechanism and a user is given the option to fix the image through a user interface where the printer is directed to fill in the missing information of the image. Defective nozzles can also be identified by printing a test pattern which identifies to a user which of the nozzles are non-functioning. The user then inputs this information to the printer.
Abstract: A fuser release agent management (RAM) system for applying release agent to a fusing apparatus is provided. The Ram system includes an application member for applying release agent to an external surface of a movable internally heated fusing member, and supply source for supplying release agent to the application member. Importantly, the RAM system includes a heating and release agent redistributing member mounted into contact with the external surface of the internally heated fusing member for additionally heating the external surface and release agent thereon, and for redistributing and smoothing out the release agent thereon, thereby eliminating an interdocument agent banding problem, and differential gloss ordinarily created by areas of unredistributed release agent thereon.
Abstract: Disclosed is a process which comprises the steps of (a) providing a polymer containing at least some monomer repeat units with halomethyl group substituents which enable crosslinking or chain extension of the polymer upon exposure to a radiation source which is electron beam radiation, x-ray radiation, or deep ultraviolet radiation, said polymer being of the formula ##STR1## wherein x is an integer of 0 or 1, A is one of several groups, as specified in the claims, and B is one of several groups, as specified in the claims or mixtures thereof, and n is an integer representing the number of repeating monomer units, and (b) causing the polymer to become crosslinked or chain extended through the photosensitivity-imparting groups. Also disclosed is a process for preparing a thermal ink jet printhead by the aforementioned curing process.
Abstract: A method for removing selenium from waste water is disclosed comprising reducing selenium oxide with carbohydrazide in a solution comprised of the selenium oxide to form elemental selenium.
Type:
Grant
Filed:
January 25, 1994
Date of Patent:
July 18, 2000
Assignee:
Xerox Corporation
Inventors:
Donald J. Goodman, Raymond E. Kerollis, Albert B. Mindler, Bruce Bruns
Abstract: A color image forming device produces a good image form, superior in color and gradation reproduction, and little over-enhancement in sharpness during generation duplicating. The device has an image processing parameter storage unit that stores parameters for processing which correspond to original document modes in respective processing blocks. An image processing parameter detector detects the original document mode, and provides the mode to the respective components as an original document mode directive TAG. When generation duplicating is designated, the generation duplicating mode corresponding to the set original document mode is set, and various parameter settings are indicated corresponding to the set generation duplicating mode in the image processing parameter storage unit. By such, the operation in each image processing module is converted to the set generation duplicating mode.