Patents Represented by Attorney John D. Husser
  • Patent number: 4709248
    Abstract: Ink jet printer for printing along a linear print zone with a plurality of insertable print/cartridges employs a carriage for traversing the print zone and supporting the print/cartridges with their orifice arrays mutually indexed to a carriage reference that is parallel to the direction of carriage traverse; detecting and storing the relative transverse locations of the indexed orifice arrays; and controlling the actuations of the supported print/cartridges in accordance with their detected transverse locations. A detecting and storing sub-system detects and stores inter-array spacings in the form of encoder mark-count plus intra-mark phase information. A control sub-system: (1) outputs printing information signals for the print/cartridges on the basis of the stored mark-count information; and (2) enables print/cartridge actuations in sequential orders based on the stored intra-mark phase information. These orders differ in forward and retrace printing.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: November 24, 1987
    Assignee: Eastman Kodak Company
    Inventors: Michael J. Piatt, Randy Ray
  • Patent number: 4709245
    Abstract: Ink jet printing apparatus, for cooperative printing along a common linear print zone with a plurality of disposable print/cartridges having linear orifice arrays, utilizes a carriage which traverses adjacent and parallel to the print zone and includes positioning structure for insertably receiving and releasably constraining a plurality of print/cartridges in transversely spaced relation with the line of their orifice arrays precisely perpendicular to the direction of carriage traverse and vertically indexed to the direction of carriage traverse. The printer has a detector for sensing and storing the relative-transverse locations of the orifice arrays of the positioned print/cartridges. A printing controller regulates actuation of each positioned print/cartridge in accordance with its detected relative-transverse location to achieve proper horizontal drop placements.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: November 24, 1987
    Assignee: Eastman Kodak Company
    Inventor: Michael J. Piatt
  • Patent number: 4707081
    Abstract: A linear light valve array having transversely driven, discretely addressable, electro-optic gates which selectively change the polarization of incident light is disclosed. The array has a plurality of spaced gates. Each gate includes a planar light receiving top surface which receives incident polarized light, and first and second spaced parallel electrode receiving surfaces that are arranged substantially normal to the top receiving surface. Discretely addressable electrodes are formed on such receiving surfaces. In response to an applied voltage, the electrodes of a gate establish a transverse electric field which changes the plane of polarization of light passing through the gate and substrate. In another aspect of this invention, a method of making such a linear light valve array is disclosed. In accordance with this method, a strip of photoresist material is formed on a wafer of electro-optic material. Grooves are then cut in the wafer on each side of the strip.
    Type: Grant
    Filed: September 27, 1985
    Date of Patent: November 17, 1987
    Assignee: Eastman Kodak Company
    Inventor: Jose M. Mir
  • Patent number: 4666802
    Abstract: A novel C-centered monoclinic bromoindium phthalocyanine pigment is obtained by reacting high-purity diiminoisoindoline with indium tribromide in the solvent, 1-methyl-2-pyrrolidinone. Multiactive photoconductive elements prepared by dispersion-coating a charge-generation layer containing this pigment have high sensitivity to near-infrared radiation.
    Type: Grant
    Filed: July 16, 1986
    Date of Patent: May 19, 1987
    Assignee: Eastman Kodak Company
    Inventors: Yann Hung, Michael T. Regan, William J. Staudenmayer
  • Patent number: 4639738
    Abstract: The detection system includes a cartridge having a first detection port for detecting the pressure condition in the top portion of the cartridge and a second detection port and tube for detecting the pressure condition in a bottom portion of the cartridge. The cooperative printer structure couples these ports to a pressure differential sensor that signals a printer refill condition.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: January 27, 1987
    Assignee: Eastman Kodak Company
    Inventors: Lawrence R. Young, Gregory J. Sexton, Randal L. Mullins, Brian D. Bradley
  • Patent number: 4626869
    Abstract: An ink jet printing apparatus includes elements for capillary support of ink in a region adjacent the orifice plate and lower print head structure and elements for selectively enclosing that region from the atmosphere. Elements for selectively removing ink from the capillary support region are provided.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: December 2, 1986
    Assignee: Eastman Kodak Company
    Inventor: Michael J. Piatt
  • Patent number: 4623897
    Abstract: Ink jet printing apparatus having an improved system for start-up or maintenance includes elements for adjusting ink flow to impact on lower print head structure and elements for thereafter air skiving the ink from that structure.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: November 18, 1986
    Assignee: Eastman Kodak Company
    Inventors: Mark E. Brown, Bruce W. Gamble, Michael J. Piatt, Randy D. Vandagriff
  • Patent number: 4622562
    Abstract: The performance of ink jet printing apparatus is markedly improved by heating critical lower print head surfaces, e.g. the exposed charge plate and catcher surfaces, to a temperature sufficiently above the ink temperature to prevent vapor condensation on those surfaces.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: November 11, 1986
    Assignee: Eastman Kodak Company
    Inventors: David N. Pipkorn, Robert G. Leen
  • Patent number: 4614948
    Abstract: In a continuous ink jet printing apparatus, an ink circulating system allows maintenance of the ink supply reservoir at approximately atmospheric pressure while providing for positive withdrawal of ink from the catcher and/or print head outlet of the apparatus. The system is operable with a single pump. To achieve such positive withdrawal of ink, elements are provided in a bypass line extending from the supply pump outlet to the atmospheric region of the ink reservoir or in the passage from that region of the ink reservoir to the pump intake line, for generating a region(s) of sub-atmospheric pressure, and such region(s) are coupled to the catcher and/or print head outlet.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: September 30, 1986
    Assignee: Eastman Kodak Company
    Inventors: James A. Katerberg, Evan L. Craig, David A. Huliba
  • Patent number: 4607261
    Abstract: An ink cartridge constructed for insertion into a continuous ink jet printer, includes a reservoir for containing an ink supply, an outlet for coupling the ink reservoir to a printer supply line, cartridge venturi elements having (i) a restriction region, (ii) an expansion region and (iii) an inlet for detachable coupling to an ink bypass line of such printer. The cartridge also includes an ink return inlet couplable to an ink return line(s) of the printer and a path defining an ink induction passage that extends from the venturi restriction region to the ink return inlet. Structural features of printer apparatus, adapted to cooperate with such a cartridge, are also disclosed.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: August 19, 1986
    Assignee: Eastman Kodak Company
    Inventors: James D. McCann, Michael J. Piatt, Theodore F. Williams
  • Patent number: 4602863
    Abstract: Electrographic development is obtained by predeterminedly rotating an alternating pole core of a magnetic brush applicator, within a surrounding applicator shell, to supply developer, of the kind including small particle, hard-magnetic carrier and electrically insulative toner, to an electrostatic imaging member which moves past a development station with predetermined linear velocity. The shell can be stationary or rotate at a velocity significantly less than the image member velocity. The core is predeterminedly rotated so that (i) its fields effect a large portion of transport through the development zone and (ii) the developer moves co-currently with the imaging member and at a linear velocity generally equal to the imaging member velocity.
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: July 29, 1986
    Assignee: Eastman Kodak Company
    Inventors: Garold F. Fritz, George P. Kasper, Arthur S. Kroll, Michael Mosehauer
  • Patent number: 4600928
    Abstract: Ink jet printing apparatus having a cleaning system whereby ink is supported proximate the droplet orifices, the charge plate and/or the operative catcher surface and ultrasonic cleaning vibrations are imposed on the supported ink mass. Such cleaning can be implemented with ink cross-flowing through the print head cavity and/or in cooperation with a varying pressure differential across the charge plate, which cause ink to oscillate inwardly/outwardly within the orifices.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: July 15, 1986
    Assignee: Eastman Kodak Company
    Inventors: Hilarion Braun, Michael J. Piatt
  • Patent number: 4591869
    Abstract: To protect critical operative portions (e.g. the orifice plate) of ink jet printing apparatus from airborne debris particles (e.g. paper dust), a wall is provided to substantially enclose a region around those critical operative portions and filtered air is induced to flow through the enclosed region from a location proximate the operative portions to a droplet outlet. In one mode the energy of printing droplet streams induces the air flow. In another embodiment the energy of printing substrate movement induces the air flow.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: May 27, 1986
    Assignee: Eastman Kodak Company
    Inventors: James A. Katerberg, Gregory M. Kopp, Michael J. Piatt
  • Patent number: 4591875
    Abstract: An ink circulation system for continuous ink jet printers includes a replaceable ink cartridge, forming a supply/return reservoir, and cooperative positioning and interconnection structure of the printer apparatus. The cartridge includes valved ports that are adapted to cooperate with valved terminals of the printer conduits in a manner obviating ink spillage. The system provides cooperative positioning and engagement structures of the cartridge and printer, which simplify cartridge insertion and removal.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: May 27, 1986
    Assignee: Eastman Kodak Company
    Inventor: James D. McCann
  • Patent number: 4591873
    Abstract: A cleaning system for ink jet printing orifices includes cooperative elements which provide varying pressure differentials across the orifice plate that oscillate ink into and out of the orifices. In one embodiment the pressure differentials are implemented by varying the impedance to ink cross-flow through a print head cavity while pressurizing a region around the exterior of the orifices.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: May 27, 1986
    Assignee: Eastman Kodak Company
    Inventors: James D. McCann, Michael J. Piatt, Theodore F. Williams
  • Patent number: 4591870
    Abstract: A system for cleaning lower print head structure of ink jet printing apparatus effects: (i) a condensation cycle wherein a droplet stream(s) are directed past such print head structure in a solvent condensing mode, (ii) a drying cycle in which air is directed across said print head structure to remove condensed solvent and (ii) a heating cycle wherein the lower print head structure is heated to a temperature obviating condensation of solvent from said stream(s).
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: May 27, 1986
    Assignee: Eastman Kodak Company
    Inventors: Hilarion Braun, Mark E. Brown, Michael J. Piatt
  • Patent number: 4591874
    Abstract: A home station of an ink jet printing apparatus is adapted to seal operative print head portions from the ambient atmosphere for storage and includes (i) a housing for collecting ink from the print head, during start-up and testing operations, (ii) a sensor for receiving ink droplets and detecting their charge condition and (iii) a fluid handling configuration that electrically decouples the ink in contact with the sensor from ink being returned from the housing for recirculation.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: May 27, 1986
    Assignee: Eastman Kodak Company
    Inventor: Michael J. Piatt
  • Patent number: 4540271
    Abstract: A device for coupling the conductive layer of a film-type photoconductor sheet to a source of reference potential includes a plurality of sharp, vitreous carbon particles which are attached to an engaging member and electrically coupled to a source of reference potential, e.g. ground. The engaging member is adapted to urge the particles to penetrate the photoconductive insulator layer and form a low resistance, ohmic contact with the conductive layer of the photoconductor sheet.
    Type: Grant
    Filed: June 29, 1983
    Date of Patent: September 10, 1985
    Assignee: Eastman Kodak Company
    Inventor: David M. Rakov
  • Patent number: 4537490
    Abstract: Method and apparatus for electrophotographically producing high quality reproductions which contain different content types. Photoconductor image sectors are subjected to separate, component exposures selected for (1) good tone-scale reproduction of continuous-tone image portions and (2) high-contrast reproduction of line-type image portions. Photoconductor background areas, which border continuous-tone image portions, are exposed to a discharge level below the system's development level.
    Type: Grant
    Filed: June 4, 1984
    Date of Patent: August 27, 1985
    Assignee: Eastman Kodak Company
    Inventor: Michael D. Stoudt
  • Patent number: 4531832
    Abstract: Contrast and/or density adjustment of developed electrographic images is effected in a development system comprising a hard magnetic carrier and a magnetic brush having a rotary core and shell. The adjustment is effected by cooperatively varying the core and shell rotation rates, within predetermined ranges, in a manner which maintains the operative developer linear velocity generally equal to, and co-current with, the velocity of an electrographic image member's movement through the development zone.
    Type: Grant
    Filed: August 1, 1983
    Date of Patent: July 30, 1985
    Assignee: Eastman Kodak Company
    Inventors: Arthur S. Kroll, Frank A. Shuster