Patents Represented by Attorney H. Fleischer

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  • Operator adjustable color image processing
    Patent number: 4972257
    Abstract: An operator controllable apparatus which adjusts the color of a copy being reproduced from a multi-colored original document. The original document is scanned and a set of primary color densities therein measured. The measured set of primary color densities is changed to a set of colorimetric coordinates. The operator adjusts the set of colorimetric coordinates so that the copy has the desired hue, saturation and darkness. The operator adjusted set of colorimetric coordinates is transformed into a set of subtractive primary color densities. This set of subtractive primary color densities controls the marking engine to form a copy having the desired hue, saturation and darkness.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: November 20, 1990
    Assignee: Xerox Corporation
    Inventors: David Birnbaum, Lee A. Cass
  • Toner usage detector based on current biasing mixing means
    Patent number: 4972230
    Abstract: An apparatus which measures the usage of toner in a developer unit. A donor roll receives toner material from a mixer. The mixer fluidizes the toner with the pressure from newly discharged toner moving the fluidized toner from one end of the developer unit to the other end thereof. An electrical bias is applied between the donor roll and mixer. The current biasing the mixer is detected and a signal transmitted in response thereto corresponding to the usage of toner in the developer unit. This signal controls the discharge of toner into the developer unit.
    Type: Grant
    Filed: October 31, 1989
    Date of Patent: November 20, 1990
    Assignee: Xerox Corporation
    Inventor: William H. Wayman
  • Linearly movable developer unit magnet
    Patent number: 4972231
    Abstract: An apparatus which develops a latent image recorded on a photoconductive member with developer material. The developer material is transported by a tubular member into a development zone. Developer material is attracted to the surface of the tubular member by a stationary magnet. A movable magnet translates from an operative position, wherein the magnet generates a weak magnetic field in the development zone, and a non-operative position, wherein the magnet generates a strong magnetic field in the development zone. In the operative position, the weak magnetic field releases the developer material from the surface of the tubular member so that the latent image attracts the developer material thereto. In the non-operative position, the strong magnetic field attracts the developer material to the surface of the tubular member preventing development of the latent image.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: November 20, 1990
    Assignee: Xerox Corporation
    Inventor: Jan Bares
  • Color image processing apparatus
    Patent number: 4970562
    Abstract: A color image processing apparatus in which a latent image corresponding to one of the color components of an original document is recorded on an image receiving member. The original document is scanned and a plurality of color components of the original document are detected. Color signals, representative of each one of the plurality of color components detected, are generated. As the latent image is being recorded on the image receiving member, those regions of the latent image wherein the color signals have a preselected relationship to one another are erased.
    Type: Grant
    Filed: May 22, 1989
    Date of Patent: November 13, 1990
    Assignee: Xerox Corporation
    Inventors: David Birnbaum, Lee A. Cass, Timothy M. Hunter, Larry A. Kovnat, Paul G. Roetling
  • Developer unit mounting apparatus
    Patent number: 4963936
    Abstract: A mounting apparatus for a developer unit adapted to develop an electrostatic latent image recorded on a photoconductive member. A support system is mounted pivotably on a frame and slidably supports the developer unit. The support system pivots from an operative position wherein the developer unit is positioned adjacent the photoconductive member to a non-operative position wherein the developer unit is inclined away from the photoconductive member. In the non-operative position, the developer unit may be slidably removed from the printing machine.
    Type: Grant
    Filed: December 5, 1989
    Date of Patent: October 16, 1990
    Assignee: Xerox Corporation
    Inventor: Stephen W. Carter
  • Development apparatus
    Patent number: 4963937
    Abstract: An apparatus in which a latent image recorded on a belt extending in a direction transverse to a horizontal plane is developed with a developer material. At least two developer rollers are mounted, at least partially, in the chamber of a housing storing a supply of developer material. The developer rollers are spaced from one another and have different diameters. The spacing between each of the developer rollers and the diameters of each of the developer rollers is selected so that a plane tangential to the lowermost region of each of the developer rollers is substantially parallel to the horizontal plane.
    Type: Grant
    Filed: March 17, 1989
    Date of Patent: October 16, 1990
    Assignee: Xerox Corporation
    Inventor: Elizabeth D. Diehl
  • Multi-document editing
    Patent number: 4963932
    Abstract: A copy system in which at least one original document of a set of original documents is edited. An editing device associated with an electrophotographic printing machine edits the information in the selected original document and designates the page number of the original document selected for editing. Original documents are advanced sequentially from the set of original documents to the printing machine. The printing machine forms a set of copies corresponding to the set of original documents with the copy of the selected original document containing the edited information.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: October 16, 1990
    Assignee: Xerox Corporation
    Inventor: Jeno L. Horvath
  • Damped binding apparatus
    Patent number: 4958974
    Abstract: An apparatus which adhesively binds a set of sheets by applying a strip having an adhesive on one surface thereof to the spine of the set. The strip is supported on a heated platen which softens the adhesive. The spine of the set of copy sheets is pressed into the adhesive on the strip. The depth of penetration of the spine into the adhesive is controlled so as to form a layer of adhesive between the spine and the strip having a predetermined thickness. As the spine of the set of copy sheets is moved into contact with the adhesive on the strip, it is damped to absorb a substantial portion of the kinetic energy of the set of sheets to reduce the deflection and distortion of the set of sheets.
    Type: Grant
    Filed: August 7, 1989
    Date of Patent: September 25, 1990
    Assignee: Xerox Corporation
    Inventor: Richard C. Schenk
  • Apparatus for cleaning and moving a photoreceptor
    Patent number: 4949133
    Abstract: An electrophotographic printing machine in which extraneous liquid developer material on a photoconductive belt is substantially removed therefrom by a cleaning roller. A backup roller is rotatively coupled to the cleaning roller with the photoconductive belt being interposed therebetween. The rollers are pressed into contact with the photoconductive belt. Either the photoconductive belt or backup roller are moved with movement of one frictionally moving the other. In this way, the cleaning roller and the belt move with the extraneous liquid material being removed fom the belt.
    Type: Grant
    Filed: November 16, 1988
    Date of Patent: August 14, 1990
    Assignee: Xerox Corporation
    Inventor: Benzion Landa
  • Transfer apparatus
    Patent number: 4947214
    Abstract: An apparatus which transfers a developed image from a photoconductive surface to a copy sheet. The apparatus includes a corona generating device arranged to charge the copy sheet. This establishes a transfer field that is effective to attract the developed image from the photoconductive surface to the copy sheet. A blade is moved from a nonoperative position spaced from the copy sheet, to an operative position, in contact therewith. The blade presses the copy sheet into contact with at least the developed image on the photoconductive surface to substantially eliminate any spaces between the copy sheet and the developed image during transfer of the developed image from the photoconductive surface to the copy sheet.
    Type: Grant
    Filed: January 10, 1989
    Date of Patent: August 7, 1990
    Assignee: Xerox Corporation
    Inventors: Douglas J. Baxendell, Michael J. Cortash, William G. Osbourne, Robert L. Thompson
  • Transfer apparatus
    Patent number: 4947215
    Abstract: An apparatus which transfers a liquid image from an image support surface to a sheet. A deformable cylindrical member made from a flexible, dielectric material presses the sheet against the image support surface. As the cylindrical member presses the sheet against the image support surface, it deforms to define a transfer area. A conductive roll, disposed interiorly of the cylindrical member in the transfer area, tacks the liquid image to the image support surface. A corona generating device, positioned adjacent the conductive roll interiorly of the cylindrical member, transfers the liquid image from the image support surface to the sheet.
    Type: Grant
    Filed: November 15, 1989
    Date of Patent: August 7, 1990
    Assignee: Xerox Corporation
    Inventor: Thomas C. Chuang
  • Sheet feeding and leveling apparatus
    Patent number: 4942435
    Abstract: An electrophotographic printing in which successive copy sheets are supplied from a supply source thereof. A tray is arranged to have a stack of copy sheets disposed thereon. When one marginal region of the stack of copy sheets has a greater thickness than the other marginal region, a support is interposed between the tray and the lowermost sheet of the stack of copy sheets so that at least the opposed marginal regions of the uppermost sheet of the stack of copy sheets are at substantially about the same level.
    Type: Grant
    Filed: September 28, 1988
    Date of Patent: July 17, 1990
    Assignee: Xerox Corporation
    Inventors: Charles S. Kneisel, Kenneth B. Mahon, Raymond A. Povio
  • Non-rotating paper path idler
    Patent number: 4938468
    Abstract: An apparatus in which an advancing sheet is guided along a paper path. The apparatus includes a non-rotating, arcuate member, positioned closely adjacent to a drive roller, defining a nip through which the advancing sheet moves. The arcuate member resiliently urges the sheet into contact with the drive roller to move the sheet between adjacent guide plates along the sheet path.
    Type: Grant
    Filed: October 24, 1985
    Date of Patent: July 3, 1990
    Assignee: Xerox Corporation
    Inventor: Walter F. Wafler
  • Multicolor printing system
    Patent number: 4935788
    Abstract: A multicolor printing system of the type in which a plurality of latent images are recorded therein. Each one of the plurality of latent images are developed with a different color liquid developer material to form a plurality of different color liquid images. The different color liquid images are transferred, in superimposed registration with one another, to an intermediate member to form a multicolor liquid image thereon. Thereafter, the multicolor liquid image is, in turn, transferred to a sheet and fused thereto.
    Type: Grant
    Filed: June 16, 1988
    Date of Patent: June 19, 1990
    Assignee: Xerox Corporation
    Inventors: Joseph Fantuzzo, Lawrence J. Fraser, Edwin R. Monkelbaan, Thomas Robson
  • Variable speed pulley
    Patent number: 4929217
    Abstract: A variable speed pulley adapted to be mounted on a shaft has a resilient member with an exterior surface adapted to support a belt thereon. The compression of the resilient member is controlled to adjust the location of the exterior surface of the resilient member. The effective diameter of the pulley increases or decreases as a function of the location of the exterior surface of the resilient member.
    Type: Grant
    Filed: August 1, 1989
    Date of Patent: May 29, 1990
    Assignee: Xerox Corporation
    Inventor: Rudolph Merbler
  • Auger unit
    Patent number: 4926790
    Abstract: An apparatus which transports and mixes developer material in the chamber of a developer housing. An auger advances a portion of the developer material from one end to the other end of the housing. The auger has an expansion chamber extending over a portion of the chamber through which at least a portion of the developer material flows. The expansion chamber increases the mixing of the developer material and the triboelectric charge of the toner particles.
    Type: Grant
    Filed: September 22, 1988
    Date of Patent: May 22, 1990
    Assignee: Xerox Corporation
    Inventor: Thomas W. Nash
  • Contaminant cleaner
    Patent number: 4928149
    Abstract: A device for use in an electrophotographic printing machine which prevents magnetic particles moving with a photoconductive belt from contaminating processing stations located thereafter. A magnet is mounted on a support located before one of the processing stations. The magnet generates a magnetic flux field attracting magnetic particles moving with the photoconductive belt to prevent contamination of processing stations located thereafter.
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: May 22, 1990
    Assignee: Xerox Corporation
    Inventor: James E. Harmon
  • Sealing arrangement for a toner dispensing cartridge
    Patent number: 4924920
    Abstract: An apparatus for dispensing material in which a housing is adapted to store a supply of material therein. The housing has an exit aperture for discharging the material therefrom. The exit aperture is sealed by inner and outer seals. The outer seal prevents access to the inner seal when the exit aperture is in a closed position. When the housing is moved from the closed position to an open position, the inner seal moves over the outer seal to an open position wherein the exit aperture is spaced from both the inner and outer seals so that material may be discharged therefrom.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: May 15, 1990
    Assignee: Xerox Corporation
    Inventor: Anil G. Bhagwat
  • Dual mode set delivery apparatus
    Patent number: 4926220
    Abstract: A dual mode apparatus in which set of sheets are delivered to an operator. The operating mode of the apparatus is selected, and sets of sheets are received and supported at a loading station. In response to the selected mode of operation, sets of sheets are advanced from the loading station to the unloading station for delivery to the operator. In one mode of operation, the sets of sheets are advanced from the loading station to the unloading station after the completion of each job. In another mode of operation, the sets of sheets are advanced from the loading station to the unloading station after the maximum number of sets of sheets have been stacked at the loading station independent of the number of jobs.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: May 15, 1990
    Assignee: Xerox Corporation
    Inventors: James F. Matysek, Charles E. Smith
  • Particle transport
    Patent number: 4926217
    Abstract: An apparatus in which particles are moved from one end of a duct to the other end thereof. The particles in the duct are fluidized. A pressure differential is generated which moves the fluidized particles in the duct from one end of the duct to the other end thereof.
    Type: Grant
    Filed: August 11, 1986
    Date of Patent: May 15, 1990
    Assignee: Xerox Corporation
    Inventor: Jan Bares