Using Ion Or Particle Flow Modulation Patents (Class 430/53)
  • Patent number: 9211736
    Abstract: Embodiments described herein are directed to a system for reducing electrostatic fields underneath print heads in a direct marking printing system. The system includes: one or more print heads for depositing ink onto a media substrate; a media transport for moving the media substrate along a media path past the one or more print heads; a conductive platen contacting the media transport belt; and an electrostatic field reducer that includes an alternating current corona device positioned upstream of the one or more print heads. The media transport includes a media transport belt and, when the media substrate is on the transport belt it has an electrostatic field, which can cause printing defects. The electrostatic field reducer reduces the electrostatic field on the surface of the media substrate and thereby reduces printing defects.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: December 15, 2015
    Assignee: Xerox Corporation
    Inventors: Gerald M. Fletcher, Joannes N. M. de Jong, Peter Knausdorf, Steven R. Moore, Palghat S. Ramesh
  • Patent number: 9122167
    Abstract: A photopolymer layer is formed on an organic device substrate and exposed to patterned radiation. The photopolymer layer includes a photopolymer comprising at least a first repeating unit having an acid-catalyzed, solubility-altering reactive group, wherein the total fluorine content of the photopolymer is less than 30% by weight. The pattern exposed photopolymer is contacted with a developing agent, such as a developing solution, to remove unexposed photopolymer, thereby forming a developed structure having a first pattern of exposed photopolymer covering the substrate and a complementary second pattern of uncovered substrate corresponding to the unexposed photopolymer. The developing agent comprises at least 50% by volume of a hydrofluoroether developing solvent.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: September 1, 2015
    Assignee: Orthogonal, Inc.
    Inventors: John Andrew Defranco, Francis Houlihan, Charles Warren Wright, Diane Carol Freeman, Frank Xavier Byrne, Douglas Robert Robello, Sandra Rubsam, Terrence Robert O'Toole
  • Patent number: 9104104
    Abstract: A fluorinated photopolymer is formed on a device substrate and exposed to patterned radiation. The photopolymer has a total fluorine content in a weight range of 15 to 60% and comprises at least three distinct repeating units, including a first repeating unit having a fluorine-containing group, a second repeating unit having an acid- or alcohol-forming precursor group, and a third repeating unit different from the first and second repeating units. The pattern-exposed photopolymer layer is contacted with a developing solution comprising at least a first fluorinated solvent that dissolves the unexposed photopolymer thereby forming a developed structure having a first pattern of photopolymer covering the substrate and a complementary second pattern of uncovered substrate. The developing solution is selected to provide a maximum photopolymer contrast in a range of 1.9 to 5.0.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: August 11, 2015
    Assignee: Orthogonal, Inc.
    Inventors: Charles Warren Wright, Diane Carol Freeman, Frank Xavier Byrne, John Andrew DeFranco, Sandra Rubsam, Terrence Robert O'Toole, Douglas Robert Robello
  • Publication number: 20090029274
    Abstract: A method of removing contamination from a substrate having an ion-implanted region is described. The method comprises applying a composition comprising a fluorinated solvent and a co-solvent to the substrate in an amount sufficient to assist in the removal of contamination from the substrate. As contaminant is removed, metal patterns or other desired features on the substrate remain. Additionally, the composition for removing contamination is not harmful to the user or the substrate (i.e., non-flammable and/or non caustic).
    Type: Application
    Filed: July 25, 2007
    Publication date: January 29, 2009
    Inventors: Erik D. Olson, Philip G. Clark
  • Patent number: 6862016
    Abstract: A method and apparatus capable of displaying a high-quality image using a reversible image display medium in which a cell(s) formed between two substrates accommodates at least two kinds of frictionally chargeable dry developing particles having different chargeable polarities and different optical reflection densities in image display, an electric field strength of, e.g., 0.3 V/?m to 3.0 V/?m is applied to the developer. An oscillating force (e.g. oscillating magnetic filed) is applicable and the oscillating force is substantially stopped during application of the electrostatic field. After completion of the electrostatic field, the surface of the medium on the image observation side may be charged to a potential holding the displayed image. Optionally, before image display, an alternating electric field may be applied to stir the developer for initialization of the medium.
    Type: Grant
    Filed: November 16, 2001
    Date of Patent: March 1, 2005
    Assignee: Minolta Co., Ltd.
    Inventors: Masahiko Matsuura, Hiroshi Mizuno, Akihito Ikegawa, Masaharu Kanazawa, Keyaki Yogome, Takaji Kurita
  • Publication number: 20030180640
    Abstract: An image forming apparatus useable with colorant and media includes a colorant applicator at which colorant is provided, and a nanotube assembly that emits electron beams to selectively charge the colorant on the colorant applicator, such that one of the charged and uncharged colorant is electrically attractable to the media.
    Type: Application
    Filed: March 20, 2002
    Publication date: September 25, 2003
    Applicant: BROTHER INTERNATIONAL CORPORATION
    Inventor: Mark A. Darty
  • Patent number: 5955228
    Abstract: A method of forming a powder image on a recording medium and an apparatus therefor are disclosed. The apparatus includes a toner carrier for carrying powdery toner in a layer or layers thereon, a counter electrode, and a flight control member having independent or continuous extremely small holes and a plurality of control electrodes for controlling the passage of toner through the holes. A voltage is applied to the control electrodes in accordance with an image signal in order to cause the toner to fly from the toner carrier toward the counter electrode via the holes. The toner deposits on the recording medium intervening between the flight control member and the counter electrode, forming an image on the recording medium.
    Type: Grant
    Filed: March 13, 1997
    Date of Patent: September 21, 1999
    Assignee: Ricoh Company, Ltd
    Inventors: Katsuo Sakai, Takahiko Tokumasu, Osamu Endo, Masami Kadonaga
  • Patent number: 5790925
    Abstract: An image forming apparatus of the present invention comprises an image carrying member 2, a photosensitive member 9, a first voltage applying means 13, and an exposure means 5. The image carrying member 2 has an insulating layer 25 formed on a first conductive layer 23. The photosensitive member 9 has a photosensitive layer 93 formed on a second conductive layer 92. The photosensitive member 9 is supported so that the photosensitive layer 93 is opposed to the insulating layer 25 of the image carrying member 2. The first voltage applying means 13 applies a voltage between the first conductive layer 25 and the second conductive layer 92. A pattern-like surface electrode layer 98 is formed on the surface of the photosensitive layer 93 opposed to the image carrying member 2. A second voltage applying means 14 applies a bias voltage to the surface electrode layer 98.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: August 4, 1998
    Assignee: Minolta Co., Ltd.
    Inventors: Isao Doi, Keiko Momotani, Akihito Ikegawa
  • Patent number: 5731119
    Abstract: The present invention describes an imaging element which includes a support, an image-forming layer, a transparent magnetic recording layer, and an electrically-conductive layer. The electrically-conductive layer is a dispersion in a film-forming binder of acicular, crystalline single phase, semi-conductive metal-containing particles having a cross-sectional diameter less than 0.02 .mu.m and an aspect ratio of greater than or equal to 5:1.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: March 24, 1998
    Assignee: Eastman Kodak Company
    Inventors: Dennis J. Eichorst, Paul A. Christian, Gerald M. Leszyk
  • Patent number: 5719016
    Abstract: The present invention describes imaging elements which include a support, an image-forming layer and an electrically-conductive layer. The electrically conductive layer is a dispersion in a film-forming binder of acicular, crystalline single phase, conductive metal-containing particles having a cross-sectional diameter less than 0.02 .mu.m and an aspect ratio of greater than or equal to 5:1.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: February 17, 1998
    Assignee: Eastman Kodak Company
    Inventors: Paul A. Christian, Dennis J. Eichorst, Gerald M. Leszyk
  • Patent number: 5302478
    Abstract: Ionographic imaging members include an electrically conductive layer and a dielectric layer which contains boron nitride. The dielectric layer may contain boron nitride alone or boron nitride dispersed in a binder. Methods are provided for preparing and using such imaging members.
    Type: Grant
    Filed: August 30, 1990
    Date of Patent: April 12, 1994
    Assignee: Xerox Corporation
    Inventor: Brian E. Springett
  • Patent number: 5270142
    Abstract: An ionographic imaging member having a conductive layer and a charge accepting layer, wherein the charge accepting layer is sufficiently photosensitive to provide erasure of residual charge in the member by exposure to light.
    Type: Grant
    Filed: June 27, 1990
    Date of Patent: December 14, 1993
    Assignee: Xerox Corporation
    Inventor: Christopher Snelling
  • Patent number: 5176974
    Abstract: Disclosed are ionographic imaging apparatuses and processes. One apparatus comprises an imaging means, means for applying to the imaging means a liquid material capable of forming a dielectric peel layer adhering to the imaging means, ionographic writing means for generating a latent image on the peel layer, means for developing the latent image on the peel layer, and means for simultaneously transferring the peel layer bearing the developed image from the imaging means to a substrate and affixing the peel layer bearing the developed image to the substrate.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: January 5, 1993
    Assignee: Xerox Corporation
    Inventors: Henry R. Till, Harold M. Anderson, Gerald A. Domoto, Aron Sereny, Joseph M. Crowley, Richard G. Crystal, John C. Knights, Rodney B. Proulx, Nicholas K. Sheridon, John M Lennon, Stephan Drappel
  • Patent number: 5162179
    Abstract: This invention involves a structure containing a layered imaged configuration with an overcoating layer. The overcoating layer, in addition to encapsulating the toned image, substantially strengthens the dielectric layer after it is removed from the system. Also, a process for producing a product having an image depth perception and the product itself are disclosed. The layered structure may have one or two dielectric layers having a combined thickness of from about 0.2 to about 10.0 mils.
    Type: Grant
    Filed: April 17, 1990
    Date of Patent: November 10, 1992
    Assignee: Armstrong World Industries, Inc.
    Inventors: Walter J. Lewicki, Jr., John H. Bowers
  • Patent number: 5153091
    Abstract: An ionographic process which comprises the generation of an image comprised of characters, and developing the image with a toner mixture comprised of an encapsulated toner and a toner free of encapsulation.
    Type: Grant
    Filed: December 24, 1990
    Date of Patent: October 6, 1992
    Assignee: Xerox Corporation
    Inventors: Richard P. Veregin, Jonathan D. Nash, Barkev Keoshkerian
  • Patent number: 5039598
    Abstract: Processes for preparing ionographic imaging member including providing a flexible, shrinkable tube containing a dielectric film forming polymer having a T.sub.g of at least about -40.degree. C., charge decay of less than about 2 nonocoulombs per cm.sup.2 per second and elastic memory, providing a cylindrical support member having an outer diameter that is less than the inner diameter of the flexible tube, applying a continuous coating on the interior of the tube or on the exterior of the cylindrical support member, the coating comprising a material selected from the group consisting of an electrically conductive material, an adhesive material and mixture thereof, shrinking the tube to bring the inner surface of the tube and the outer surface of the cylindrical support member into intimate physical contact with the continuous coating. This imaging member may be employed in an ionographic imaging process.
    Type: Grant
    Filed: December 29, 1989
    Date of Patent: August 13, 1991
    Assignee: Xerox Corporation
    Inventors: Dennis A. Abramsohn, John A. Frank, Joseph Mammino, Brendan C. Casey, Donald S. Sypula
  • Patent number: 5025552
    Abstract: First and second electrodes are formed on a pair of opposite surfaces of a polyimide film. The first and second electrodes respectively have a large number of small holes which oppose each other through the polyimide film. An excimer laser beam is radiated on one of the first and second electrodes. A portion of the excimer laser beam radiated on the electrodes is reflected by the electrode surfaces. The remaining portion of the laser beam radiated inside the holes of the electrodes disconnects the chemical bond of the polyimide without generating heat. As a result, holes each having a sectional shape defined by a corresponding hole fomed in the electrodes are formed in the solid insulating body.
    Type: Grant
    Filed: October 4, 1989
    Date of Patent: June 25, 1991
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Toshihide Yamaoka
  • Patent number: 4885220
    Abstract: An electroreceptor comprised of a supporting substrate and hydrogenated amorphous silicon carbide with from about 10 to about 60 atomic percent of carbon, from about 10 to about 60 atomic percent of hydrogen, and from about 10 to about 80 atomic percent of silicon.
    Type: Grant
    Filed: May 25, 1988
    Date of Patent: December 5, 1989
    Assignee: Xerox Corporation
    Inventors: Daniel E. Kuhman, Frank Jansen, Steven J. Grammatica
  • Patent number: 4879194
    Abstract: A method and apparatus using ion projection to form a tri-level latent image on a charge retentive surface. The tri-level image which comprises two image areas and a background area is utilized for highlight imaging.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: November 7, 1989
    Assignee: Xerox Corporation
    Inventor: Christopher Snelling
  • Patent number: 4828953
    Abstract: The present invention relates to a method for forming an outline of an image. By this method, at first, an electrostatic latent image bearing member is charged and then irradiated to a negative image to form an electrostatic latent image. Thereafter, the irradiated member is re-charged with a scorotron charger while applying a voltage to a grid, said voltage being lower than the surface potential of the non-image portion of the latent image, being higher than the potential of the image portion of the latent image and being of the same porality as that of the charging. By this re-charging, in one embodiment, the outline portion of the image has lower potential than the other portion. Then, the outline portion of the image with lower potential is visualized with a reversal development by using a toner charged to a polarity same as the polarity of charging.Or in another embodiment, the outline portion of the image has higher potential than the other portion.
    Type: Grant
    Filed: May 21, 1987
    Date of Patent: May 9, 1989
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Tateki Oka, Naoki Toyoshi, Tomoaki Yokoyama
  • Patent number: 4761669
    Abstract: An electrophotographic printing machine in which indicia are printed on a sheet in at least two different colors. An electrostatic latent image is recorded on a photoconductive member and developed with a liquid developer material of one color. The latent image is neutralized and ions projected onto the photoconductive member in an image wise pattern to record another latent image. This latent image is developed with a liquid developer of another color. Both liquid images are transferred substantially simultaneously to a sheet to print indicia in two colors thereon.
    Type: Grant
    Filed: May 21, 1987
    Date of Patent: August 2, 1988
    Assignee: Xerox Corporation
    Inventor: Michael J. Langdon
  • Patent number: 4675261
    Abstract: An electrophotographic process of this invention is achieved by subjecting a photosensitive screen to a matched performance of voltage applications and image irradiation to form a primary electrostatic latent image for modulating the flow of corona ions to enable a secondary electrostatic latent image on a recording member disposed in close proximity to the screen bearing the primary electrostatic latent image.
    Type: Grant
    Filed: February 23, 1977
    Date of Patent: June 23, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsunobu Ohara, Keiji Tanaka, Yujiro Ando, Inao Moriyama
  • Patent number: 4668598
    Abstract: A process for providing a direct optical readout of a pattern or collection of data in a plurality of distincitive colors on a dielectric film capable of receiving information by exposure to an electron beam imaging source, which process comprises subjecting said film to a series of separate exposures from an electron beam source, each exposure representing a portion of the overall pattern or collecton of data to be transmitted; treating said film after each exposure intended to distinguish a portion of the overall information with a toner of a distinctive color which combination of colors may be selected for maximum definition and contrast; and separately drying each of said toners on said film before re-exposing said film to said electron beam source for receipt of an additional portion of the pattern or information to be transmitted.
    Type: Grant
    Filed: July 12, 1985
    Date of Patent: May 26, 1987
    Assignee: GAF Corporation
    Inventor: Mark L. Moskowitz
  • Patent number: 4600292
    Abstract: A photoconductive screen includes a conductive screen substrate with many perforations therein, an insulating layer formed substantially on one side of the screen substrate, a biasing conductive layer substantially covering the insulating layer, and a photoconductive layer substantially covering the conductive layer. An image of electrostatic charges can be formed on the screen to control a flow of charged particles for formation of an electrostatic latent image in a chargeable layer under exposure to the flow of charged particles.
    Type: Grant
    Filed: March 26, 1984
    Date of Patent: July 15, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yoshihide Fujimaki, Masataka Takimoto, Hiroyuki Nomori
  • Patent number: 4593994
    Abstract: An ion flow modulator with high reliability used in a photocopying machine to obtain a high quality image.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: June 10, 1986
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Sakae Tamura, Masahiro Hosoya, Takeshi Matsuo, Tsutomu Uehara
  • Patent number: 4496641
    Abstract: A method of making a colour display screen for a television display tube is disclosed. On the window portion of the tube an electron-absorbing layer is provided which is scanned by means of an electron beam via the shadow mask. The charge image on the layer is then developed xerographically. The layer is preferably photoconductive so as to be able to remove the charge remaining after the development by means of a uniform exposure.
    Type: Grant
    Filed: January 18, 1983
    Date of Patent: January 29, 1985
    Assignee: U.S. Philips Corporation
    Inventors: Jacob Van Den Berg, Johannes G. Van Lent, Francis B. Strik
  • Patent number: 4442190
    Abstract: An image forming technique employing a screen photosensitive medium having therein a plurality of fine openings. Using such screen photosensitive medium an electrostatic latent image is formed on an electric charge retainable member to be modulated under the action of a modulated corona ion stream. A non-image area can be formed on the member to be modulated by providing an ion stream blocking member between a modulation ion source and the screen photosensitive medium to block the ion stream flowing from the ion source to the screen photosensitive medium at a desired and limited area. The present invention enables to form a very sharp boundary between image area and non-image area.
    Type: Grant
    Filed: July 21, 1981
    Date of Patent: April 10, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tadayuki Kitajima, Nobuhiro Kasama
  • Patent number: 4438186
    Abstract: In a process for forming electrophotographically a duplicated copy of a document by modulating a corona ion stream passing through fine apertures of a photosensitive screen in accordance with a primary electrostatic charge latent image formed on the photosensitive screen use is made of the photosensitive screen comprising an electrically conductive sheet-like member having a great number of fine apertures, a photoconductive member applied on at least one side of the conductive member and an electrically insulating member applied on the other side of the conductive member, the conductive member being completely surrounded by the photoconductive and insulating members.
    Type: Grant
    Filed: June 19, 1981
    Date of Patent: March 20, 1984
    Assignee: Olympus Optical Company Limited
    Inventors: Eiichi Sato, Akira Shimizu, Kazuhisa Yanagisawa
  • Patent number: 4435066
    Abstract: An electrostatic reproducing apparatus, in which the ion flow passing through an ion modulating electrode and reaching a reproducing member is increased by strengthening the electric field between the electrode of the ion modulating electrode and the reproducing member. Ion transmissive apertures formed in the ion modulating electrode is made to have a larger diameter at its ion outlet than at its ion inlet so that the ion transmission factor may be improved. Condenser electric field generating means such as an electrode for generating an electric field to converge the ion flow toward the ion transmissive aperture of the ion modulating electrode is mounted on the common electrode of the ion modulating electrode at its inlet so that the ion flow of the ion generator using the corona wire may be highly dense.
    Type: Grant
    Filed: March 8, 1982
    Date of Patent: March 6, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Noriyoshi Tarumi, Haruo Iwahashi, Masahiko Matsunawa, Hiroshi Tokunaga
  • Patent number: 4413044
    Abstract: An electrophotographic copying process employs a photosensitive member which includes a conductive layer carrying a sequential lamination of a photoconductive layer which is sensitive to visible light and a function layer different therefrom, forms an electrostatic latent image by trapping charge on opposite sides of either of the photoconductive layer and the function layer in such a condition that a layer which is not retaining the charge is one of photoconductive layers forming the photosensitive member, and repeatedly employs the electrostatic latent image to produce a plurality of copies. During the copying step for producing a plurality of copies, a uniform exposure by light rays which activate the one of photosensitive layers forming the photosensitive member which is not retaining the charge is applied to the photosensitive member.
    Type: Grant
    Filed: November 18, 1981
    Date of Patent: November 1, 1983
    Assignee: Olympus Optical Company Ltd.
    Inventor: Masaji Nishikawa
  • Patent number: 4388390
    Abstract: An electrophotographic method, in which a dielectric film is contacted with a surface of a charged and exposed electrophotographic layer and said film is acted on by positive and negative ions of the same concentration from a source of ions, which settle on the film and produce a latent image thereon. Then the electrophotographic layer is illuminated by an actinic light source to preserve the latent image on the film and the film is separated from the electrophotographic layer while being illuminated or after that. Thereafter the latent image obtained on the film is developed and fixed.
    Type: Grant
    Filed: January 26, 1982
    Date of Patent: June 14, 1983
    Inventor: Felix A. Anokhin
  • Patent number: 4352875
    Abstract: Disclosed is an electrophotographic process comprises applying voltage between a transparent electrode and an opaque electrode of a photosensitive member comprising isolated electrically conductive members forming image elements, a photoconductive layer, transparent electrodes and opaque electrodes, imagewise exposing the side opposite the side where the isolated electrically conductive members are arranged, resulting in formation of voltage differences between the area where light passes through a transparent electrode and the area where light does not pass through the transparent electrode, said distribution voltage being a voltage between the transparent electrode and the isolated electrically conductive electrode and a voltage between the opaque electrode and the isolated electrically conductive electrode, thereby forming a voltage image depending upon the change of voltage of the isolated electrically conductive member produced corresponding to the difference in the distribution voltage, and scanning the
    Type: Grant
    Filed: January 27, 1981
    Date of Patent: October 5, 1982
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shunichi Ishihara, Yuji Nishigaki, Nobuo Kitajima, Nobuko Kitahara
  • Patent number: 4340296
    Abstract: An electrophotographic process of this invention is achieved by subjecting a photosensitive screen to a matched performance of voltage applications and image irradiation to form a primary electrostatic latent image for modulating the flow of corona ions to enable a secondary electrostatic latent image on a recording member disposed in close proximity to the screen bearing the primary electrostatic latent image.
    Type: Grant
    Filed: June 24, 1980
    Date of Patent: July 20, 1982
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsunobu Ohara, Keiji Tanaka, Yujiro Ando, Inao Moriyama
  • Patent number: 4336317
    Abstract: A novel image forming method comprises the steps of providing a thin layer of magnetic developer particles on the surface of a developer supporting member, imagewise applying ions onto the thin layer in the presence of a magnetic field and imagewise transferring the developer particles onto the surface of another member.
    Type: Grant
    Filed: September 17, 1980
    Date of Patent: June 22, 1982
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yujiro Ando
  • Patent number: 4325625
    Abstract: An electrophotographing method for use in a copying apparatus employing a sensitizing screen having a great number of fine apertures, made in a drum shape, and a transferring means having a conductive base plate and a charge storage layer formed on the base plate. The transferring means is constructed in the form of a drum. During the process of obtaining a great number of copies from a primary electrostatic latent image which has been stored on the sensitizing means, a secondary electrostatic latent image is formed and regenerated on the transferring means from the stored primary latent image.
    Type: Grant
    Filed: September 13, 1979
    Date of Patent: April 20, 1982
    Assignee: Olympus Optical Company Limited
    Inventors: Toshio Nakatsubo, Kaoru Ohyoshi, Masaji Nishikawa, Eiichi Sato, Norio Mizukami, Akira Shimizu, Kazuhisa Yanagisawa, Kenichi Oinoue, Naotsune Tsuda, Yoshiro Suzuki
  • Patent number: 4308331
    Abstract: The invention concerns a screen photosensitive member, and an electrophotographic method using such screen photosensitive member, and relates to improvement in the screen constructed with an electrically conductive member, a photoconductive layer provided on the electrically conductive member, and a surface insulative layer constituting the screen surface at the side opposite to at least a modulating corona source. More particularly, the screen according to the present invention is further provided, at the side of the modulating corona source, with a potential holding layer which holds thereon corona ions applied to it and maintains the surface of the screen at the side of the modulating corona source at a predetermined potential.
    Type: Grant
    Filed: July 9, 1979
    Date of Patent: December 29, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventors: Noboru Narita, Keiichi Murai, Teruo Misumi
  • Patent number: 4298268
    Abstract: A device for cleaning a photosensitive screen having a multitude of fine openings for use in image formation wherein primary and secondary electrostatic latent images are formed on the screen by voltage application, the device being constructed with means for rubbing the photosensitive screen, wall means for enclosing substantially the entire rubbing means, and means for drawing out of the wall means an atmosphere containing dust which has been removed from the rubbing means.
    Type: Grant
    Filed: September 29, 1978
    Date of Patent: November 3, 1981
    Inventors: Tadashi Sato, Keiji Tanaka
  • Patent number: 4287278
    Abstract: A method for forming an electrostatic latent image on an image recording medium includes forming a primary electrostatic latent image on a screen-type photosensitive plate, forming a secondary electrostatic latent image on the image recording material by irradiating the same with a charged particle current passed through the screen-type plate carrying the primary latent image, and correcting the secondary latent image on the recording material by irradiating the same with a charged particle current passed through the screen-type plate carrying the primary latent image.
    Type: Grant
    Filed: March 21, 1980
    Date of Patent: September 1, 1981
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Tatsuo Ohta, Sohji Shinozaki, Syusaku Yoshida, Hideo Ohba
  • Patent number: 4284697
    Abstract: In an image formation method of forming an image by modulating an ion flow or charged particles with the aid of a screen having a number of fine passage openings, at least one of the screen and an image reception member is of arcuate cross-section at the modulating position and an image is formed on the screen. One of the screen and the image reception member which is greater in radius is rotated or moved at a higher velocity than the other, thereby modulating the image onto the image reception member.
    Type: Grant
    Filed: April 10, 1978
    Date of Patent: August 18, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yujiro Ando, Yukimasa Shinohara, Katsunobu Ohara
  • Patent number: 4277550
    Abstract: A photosensitive screen for an electrographic apparatus adapted to modulate a flow of corona ions by an electrostatic latent image produced thereon is disclosed. The photosensitive screen is composed of an electrically conductive mesh which is coated on one side with an insulating layer and an electrically conductive layer superimposed one upon the other in the order as mentioned and coated on the other side with a photosensitive layer.The photosensitive screen comprises further an insulating thin film layer which covers at least the electrically conductive layer for the purpose of protecting it against surrounding atmosphere and hence improving durability thereof.
    Type: Grant
    Filed: March 30, 1979
    Date of Patent: July 7, 1981
    Assignee: Olympus Optical Company Limited
    Inventors: Masaji Nishikawa, Norio Amemiya
  • Patent number: 4265531
    Abstract: Disclosed is a method for protecting a primary electrostatic latent image formed on a screen type photosensitive member. In the step for modulating ion streams or toner particle streams by the primary electrostatic latent image, due to a bias voltage impressed on the screen type photosensitive member natural corona discharge is generated by a corona discharge electrode used for forming a primary electrostatic latent image or natural discharge is generated between the photosensitive member and a conductor located close thereto so that the degradation or destruction of the primary electrostatic latent image result. The present invention provides the methods for solving this problem by electrically isolating the photosensitive member, the corona discharge electrodes and other conductors in the vicinity of the photoconductive member when a bias voltage is impressed on the latter.
    Type: Grant
    Filed: October 24, 1978
    Date of Patent: May 5, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsunobu Ohara, Nobutoshi Yoshida
  • Patent number: 4255043
    Abstract: After uniformly charging one insulator side of an insulator mesh the other side of which is subjected to electroconductive treatment, the ion flow controlled by recording signals is irradiated for a short period of time on the insulator mesh to obtain a charge distribution wherein the charge on the insulator side is neutralized corresponding to the dots to be recorded. Via mesh apertures which have been freed from the charge by neutralization, the ion flow is irradiated for a time far longer than the above-said short time on an insulating recording substrate, to obtain thereon an electrostatic latent image having an amplified charge distribution.
    Type: Grant
    Filed: July 12, 1979
    Date of Patent: March 10, 1981
    Assignee: Nippon Telegraph and Telephone Public Corporation
    Inventors: Yasushi Hoshino, Tooru Toida, Yukio Tokunaga, Kazuyoshi Tateishi, Rikuo Takano
  • Patent number: 4255507
    Abstract: An electrophotographic process of this invention is achieved by subjecting a photosensitive screen to a matched performance of voltage applications and image irradiation to form a primary electrostatic latent image for modulating the flow of corona ions to enable a secondary electrostatic latent image on a recording member disposed in close proximity to the screen bearing the primary electrostatic latent image.
    Type: Grant
    Filed: February 21, 1978
    Date of Patent: March 10, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsunobu Ohara, Keiji Tanaka, Yujiro Ando, Inao Moriyama
  • Patent number: 4248951
    Abstract: In a method of image formation, a primary electrostatic latent image is formed on a screen having a number of fine openings, the primary electrostatic latent image is used to modulate a flow of ions to thereby form a secondary electrostatic latent image on a recording medium, the secondary electrostatic latent image is developed by the use of a developer, the developed image is transferred to another recording member, the charging polarity of the residual portion of the developer remaining on the recording medium is controlled so that, at a position whereat the recording medium and the screen come close to each other, the residual developer may be subjected to a force directed toward the recording medium by an electric field present between the recording medium and the screen, and thereafter the recording medium is reused.
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: February 3, 1981
    Assignees: Canon Kabushiki Kaisha, Canon Kabushiki Kaisha
    Inventors: Yujiro Ando, Katsunobu Ohara
  • Patent number: 4245020
    Abstract: A method of making a display screen for a color television display tube in which a photoconductive layer on the window portion of the tube is provided with a uniform charge which may be either positive or negative. A charge pattern is then formed on that layer by scanning it with an electron beam passing through an apertured color selection electrode. The energy of the beam is such that the average depth of penetration of the electrons is greater than the thickness of the photoconductive layer so that the charge disappears at the regions struck by the beam. The remaining charge pattern is developed with a suspension of charged phosphor particles. By repeating this process, patterns of red, green and blue luminescent phosphor particles can be successively provided to form the display screen. It is also possible to scan the layer simultaneously or successively by three electron beams and to develop the resultant charge pattern with a light-absorbing pigment.
    Type: Grant
    Filed: February 26, 1979
    Date of Patent: January 13, 1981
    Assignee: U.S. Philips Corporation
    Inventor: Jacob van den Berg
  • Patent number: 4230786
    Abstract: An electrographic process of producing, on a dielectric coated record medium, an electrostatic copy latent image by modulating a flow of corona ions with the aid of an electrostatic latent image which has been produced on a photoconductive photosensitive screen having a number of openings. The process is characterized by making a ratio K of a maximum surface potential V volts of the electrostatic copy latent image produced on the dielectric coated record medium to an intensity of the electric field E volts/mm established between the photoconductive photosensitive screen and the dielectric coated record medium, i.e. K=V/E smaller than about 0.18 for the purpose of preventing enlargement of dots of the copy picture image.
    Type: Grant
    Filed: September 8, 1978
    Date of Patent: October 28, 1980
    Assignee: Olympus Optical Company Limited
    Inventors: Masaji Nishikawa, Toshio Nakatsubo, Hiroshi Tsuda, Shigo Fujie, Masazi Kanamaru, Shosaku Koseki
  • Patent number: 4184870
    Abstract: A method of obtaining a number of copies transferred from one electrostatic latent image produced on an electric charge carrying member coated on an electrically conductive transfer body is disclosed. The method comprises the successive steps of producing an electrostatic latent image charge on the transfer body, developing the electrostatic latent image charge into a toned picture image, applying a bias voltage between an electrically conductive screen arranged near a transfer receiving medium made in contact with the transfer body on the one hand and the transfer body on the other hand and at the same time charging the transfer receiving medium through the electrically conductive screen with a corona source of ions. The method can transfer the electrostatic latent image produced on the transfer body to the transfer receiving medium without damaging the electrostatic latent image at a high speed with a high efficiency.
    Type: Grant
    Filed: December 28, 1977
    Date of Patent: January 22, 1980
    Assignee: Olympus Optical Co., Limited
    Inventor: Yoshiro Suzuki
  • Patent number: 4181423
    Abstract: The invention basically comprises systems and methods relating to the field of electrostatics and is concerned with multicolor electrostatic reproduction, printing or constituting on coated and uncoated print receiving media with multilayer apertured elements or screens carrying charge distributions in accordance with selected color separation patterns. Ions accelerated through the apertures of the multilayer element pass therethrough under modulation control dictated by the color separation pattern, thereby forming a modulated ion stream having a cross-sectional density pattern corresponding to the color separation pattern. Electrostatic latent images are formed with modulated ion streams and are developed in various ways.
    Type: Grant
    Filed: November 8, 1976
    Date of Patent: January 1, 1980
    Assignee: Electroprint, Inc.
    Inventors: Gerald L. Pressman, Kenneth W. Gardiner