Patents Assigned to Xerox
  • Patent number: 5962177
    Abstract: A toner composition comprised of a pigment, and a linear polyester resin of the formula ##STR1## where R' is independently selected from the group consisting of phenylene, cyclohexylene, and alkylene with from 4 to about 24 carbon atoms, where R is an oxyalkylene group of the formula ##STR2## where R" is independently selected from the group hydrogen and hydrocarbon substituents with from 1 to about 24 carbon atoms, n is an integer from about 2 to about 10,000, and m is an integer from about 2 to about 10,000.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: October 5, 1999
    Assignee: Xerox Corporation
    Inventors: Guerino G. Sacripante, Walter Mychajlowskij, Beng S. Ong
  • Patent number: 5963756
    Abstract: When a color image is formed using exposure units, photoconductive drums, developing machines, transfer printing machines and the like, a color patch using each monochrome toner prepared for the above developing machines and a color patch formed by overlapping plural colors of toner are formed on a transfer medium as sample images. After the two types of color patches are fixed by a fixing roll, they are detected by a fixed image density sensor installed after the fixing roll. A control section corrects an image formation condition based upon difference in density between the two types of sample images.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: October 5, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshihiko Sakai, Hiroyuki Hotta, Seigo Makida
  • Patent number: 5961705
    Abstract: Disclosed is an ink composition which comprises (1) water; (2) a colorant; and (3) an additive selected from the group consisting of oxy acids, oxy acid salts, and mixtures thereof. Also disclosed is a thermal ink jet printing process employing the ink.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: October 5, 1999
    Assignee: Xerox Corporation
    Inventor: William M. Schwarz
  • Patent number: 5961806
    Abstract: The present invention provides an image forming method that (i) yields lower running costs, (ii) produces high resolution and high quality images as it allows for a minimum unit of the image being of molecular size, (iii) provides continuous image gradation, (iv) consists of environmentally friendly manufacturing steps, and (v) offers energy savings, low production cost and high efficiency which results in a versatile process with extensive applications in the related arts.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: October 5, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoshi Tatsuura, Shigemi Ohtsu, Lyong Sun Pu, Makoto Furuki
  • Patent number: 5963360
    Abstract: The present invention provides a nonlinear optical element having a sufficient thickness that can be used as a thin film insusceptible to crack and a process for the preparation thereof. A novel nonlinear optical element which gives a nonlinear response to incident light is provided, comprising finely divided grains of a semiconductor or metal, which grains have been separated out with the reaction of a functional group in a matrix-forming substance containing said functional group, dispersed in a matrix. A process for the preparation of a nonlinear optical element which gives a nonlinear response to incident light is also provided, which comprises mixing a solution of a matrix-forming substance containing a functional group with a metal, a semiconductor or a precursor thereof to form a uniform solution, and then allowing said functional group to undergo reaction to form a matrix while allowing finely divided grains of said metal or semiconductor to be separated out in said matrix.
    Type: Grant
    Filed: January 22, 1998
    Date of Patent: October 5, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Katsuhiro Sato, Yoshiyuki Ono, Shigetoshi Nakamura
  • Patent number: 5963717
    Abstract: An image processing apparatus has a buffer storage section for temporarily storing image data supplied from a system bus; an image processing section for receiving the data read out of the buffer storage section for performing image processing on the received data; a storage section for temporarily storing output data of the image processing section and transferring the output data to the system bus; a gate section for releasing connection between the system bus and the buffer storage section; and a control section for controlling the respective sections so that input/output of data with respect to the image processing section and input/output of data with respect to the system bus are performed in parallel. Accordingly, the transfer on the bus, and the internal transfer from the buffer to the image processing apparatus are operated separately for each other, so that the image processing apparatus can be operated at a high speed.
    Type: Grant
    Filed: January 30, 1997
    Date of Patent: October 5, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Kenji Imamura
  • Patent number: 5963937
    Abstract: A database apparatus to realize faster processing for data including a plurality of elements such as objects by conducting the loading and storing process accompanying format conversion only on necessary elements. Objects in storage format in the secondary memory apparatus are written as computable format onto the cache for processing by the application program. In addition, objects in computable format in the cache are written out as storage format on the secondary memory apparatus. A first determination device determines whether invalid or valid elements are contained in at least a portion of the object held in the cache based on status information that is held in the cache.
    Type: Grant
    Filed: April 18, 1996
    Date of Patent: October 5, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Nobuhiro Yamasaki, Yoshiki Watanabe, Hiroshi Hayata
  • Patent number: 5963769
    Abstract: In a multicolor image forming apparatus, an intermediate transfer belt is moved at a first speed. A secondary transfer roll is pressed against the intermediate transfer belt at the time of secondary transfer in order to secondarily transfer a multicolor toner image on the intermediate transfer belt onto recording paper. The secondary transfer roll is rotated by a driving unit including a gear unit at a peripheral speed higher than the first speed. A torque limiter limits the driving torque of the secondary transfer roll pressed against the intermediate transfer belt to the load torque of the secondary transfer roll separated from the intermediate transfer belt. Consequently, the secondary transfer roll is rotated at a speed equal to or slightly higher than the speed of the intermediate transfer belt and the load of the secondary transfer roll applied to the intermediate transfer belt never exceeds a predetermined value.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: October 5, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Tetsurou Emukai, Keiji Sasaki, Noribumi Sato, Akihiro Yamashita
  • Patent number: 5959683
    Abstract: An image data modification technique addresses certain image defects characteristic of still images derived from original video sources, such as television or videotape. A lack of vertical alignment of pixels in a single frame, causing a "wobble" or "jitter" artifact in the image, is detected and corrected by a series of algorithms.
    Type: Grant
    Filed: June 26, 1997
    Date of Patent: September 28, 1999
    Assignee: Xerox Corporation
    Inventor: Steven J. Harrington
  • Patent number: 5958118
    Abstract: Disclosed is an ink composition which comprises water and a colorant selected from the group consisting of (a) a mixture of Acid Yellow 23 dye and Basic Yellow 51 dye, and (b) a mixture of Acid Red 52 dye and Basic Red 15 dye.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: September 28, 1999
    Assignee: Xerox Corporation
    Inventors: Mary Anne Evans, Kathy-Jo Brodsky, Anne L. Wickett
  • Patent number: 5958119
    Abstract: A ink composition comprised of (1) a liquid cyclic vehicle (2) a cyclic compound, (3) a liquid crystalline nitrile compound, (4) a lightfastness UV absorber, (5) a lightfastness antioxidant, and (6) a colorant.
    Type: Grant
    Filed: September 23, 1997
    Date of Patent: September 28, 1999
    Assignee: Xerox Corporation
    Inventors: Shadi L. Malhotra, Danielle C. Boils
  • Patent number: 5960115
    Abstract: A decompressing method for generally providing more than four bits of decompressed data in each clock cycle. The decompressing method of this invention is capable of decoding four non-long horizontal codes in parallel and selecting either the decompressed data of the first code if it generates four or more bits of decompressed data or selecting the decompressed data of the first code with a combination of the decompressed data of the following codes if the first code generates less than four bits of decompressed data. The decompressing method decompresses the long horizontal codes (codes which generate more than four bits of data) separately.
    Type: Grant
    Filed: August 13, 1997
    Date of Patent: September 28, 1999
    Assignee: Xerox Corporation
    Inventors: Jean-Swey Kao, Ruben Medrano, Ramond Rodriguez
  • Patent number: 5959752
    Abstract: A cable network is constituted such that interconnectable, passive 4-terminal star couplers are connected to each other via optical fiber cables and a bi-directional optical relay amplifier. Cells each constituted by using free space transmission light are integrated by the cable network. An optical signal transmitted from or directed to a mobile station in a cell is linked to the cable network via an optical relay amplifier, which provides interface between free space transmission light and guided light. Even in a case where a barrier interposed between two mobile stations prevents a direct communication between those stations, a collision between those stations can be detected by a collision detection proxy server having functions of collision detection according to the principle of code transition rule violation and jamming signal transmission. A communication between those stations can be realized by connecting, to the cable network, a relay proxy server having a packet relay and transmitting function.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: September 28, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Takeshi Ota
  • Patent number: 5959649
    Abstract: A system for supplying liquid ink to a thermal ink-jet printing apparatus comprises a housing defining a single chamber having a ventilation port and an outlet port. A medium occupies at least a portion of the chamber, the medium being adapted to retain a quantity of liquid ink. A scavenger member is disposed across the outlet port, providing a capillary force greater than that of the medium.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: September 28, 1999
    Assignee: Xerox Corporation
    Inventors: Steven J. Dietl, Michael Carlotta
  • Patent number: 5959530
    Abstract: A method of preventing theft or unauthorized use of a computer including a radio frequency identification (RFID) tag allowing use of the machine only within range of the tag and when the tag is recognized. Moving or accessing the computer without the tag in range activates a security system. The computer provides a continuous authorization signal and monitors for a received signal indication of a valid response from the RFID tag. Access is denied unless a valid response is received to the authorization signal. Upon receipt of a valid response, the computer is enabled, in particular enabled to create images on paper, on screens, or to be stored in memory.
    Type: Grant
    Filed: July 29, 1998
    Date of Patent: September 28, 1999
    Assignee: Xerox Corporation
    Inventors: Gordon F. Lupien, Jr., Craig A. Smith
  • Patent number: 5958995
    Abstract: Disclosed is a composition for preparing a thermal ink jet printhead which comprises a mixture of (A) a polymer, some monomer repeat units of which have at least one photosensitivity-imparting group thereon, said polymer having a first degree of photosensitivity-imparting group substitution measured in milliequivalents photosensitivity-imparting group per gram either (1) a polymer having a second degree of photosensitivity-imparting group substitution measured in milliequivalents of photosensitivity-imparting group per gram lower than the first degree of photosensitivity-imparting group substitution, wherein said second degree of photosensitivity-imparting group substitution may be zero, wherein the mixture of the first component and the second component has a third degree of photosensitivity-imparting group substitution measured in milliequivalents of photosensitivity-imparting group per gram which is lower than the first degree of photosensitivity-imparting group substitution and higher than the second degr
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: September 28, 1999
    Assignee: Xerox Corporation
    Inventors: Ram S. Narang, Timothy J. Fuller
  • Patent number: 5958559
    Abstract: The present invention provides a reusable image recording material comprising an imaging member formed with good fixing properties, which can be obtained by an image forming device. The imaging member can be removed from said image recording material by a method for reusing the image recording material. A reusable image recording material comprises a substrate such as paper and a film which is comprised of an imaging member containing a releasing material such as wax, said film being formed on the surface of said substrate: an image forming device utilizing an electrophotographic system or a heat transfer system; and a method for reusing an image recording material, which comprises bringing an image and a transfer medium into close contact and applying heat and pressure to transfer the image to the transfer medium.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: September 28, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kaoru Torikoshi, Takashi Imai, Isamu Suzuki
  • Patent number: 5960167
    Abstract: A method for automatically configuring a printer in a network is provided. In practice, an unconfigured printer is communicatively coupled to the network and begins transmitting an advertising protocol. In turn, an entry, varying as a function of the advertising protocol is entered into a table. In response to reading the entry, an auto install program creates a set of print related objects and stores them for use with a print service manager. By reference to the objects, the print service manager communicates information to a broker for indicating to a set of network users that print operations can be performed with the previously unconfigured printer.
    Type: Grant
    Filed: December 4, 1997
    Date of Patent: September 28, 1999
    Assignee: Xerox Corporation
    Inventors: John T. Roberts, Lawrence W. Meyer, Michael H. Wang, Peter J. Zehler
  • Patent number: 5959475
    Abstract: An analog video buffer utilizes a complementary push-pull CMOS source follower video buffer with a feedback driver. The CMOS source follower provides a low impedance output node with high driving capabilities, high switching speed, and rail-to-rail linearity and the feedback driver isolates the output node from the feedback needed for the design of the video buffer to provide a transient response without ringing or overshoot.
    Type: Grant
    Filed: January 13, 1998
    Date of Patent: September 28, 1999
    Assignee: Xerox Corporation
    Inventor: Mehrdad Zomorrodi
  • Patent number: 5958120
    Abstract: Disclosed is an ink composition which comprises (a) water; (b) a colorant selected from the group consisting of reactive dyes having terminal vinyl sulfate groups and mixtures thereof; (c) N,N'-bis(3-aminopropyl)-1,2-ethylenediamine; (d) imidazole; (e) phosphorous acid or a phosphite salt; (f) tripropylene glycol monomethyl ether; and (g) a salt selected from Zn.sup.2+ salts and mixtures thereof. Also disclosed is an ink jet printing process employing the ink.
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: September 28, 1999
    Assignee: Xerox Corporation
    Inventors: Kurt B. Gundlach, Richard L. Colt, Luis A. Sanchez