US3730710A - Electrostatic imaging employing a dot electrode - Google Patents

Electrostatic imaging employing a dot electrode Download PDF

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Publication number
US3730710A
US3730710A US00054239A US3730710DA US3730710A US 3730710 A US3730710 A US 3730710A US 00054239 A US00054239 A US 00054239A US 3730710D A US3730710D A US 3730710DA US 3730710 A US3730710 A US 3730710A
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United States
Prior art keywords
electrode
photoreceptor
recorder
layer
image
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00054239A
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English (en)
Inventor
W Ohta
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Ricoh Co Ltd
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Ricoh Co Ltd
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Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
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Publication of US3730710A publication Critical patent/US3730710A/en
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/02—Charge-receiving layers

Definitions

  • a recorder having an insulating layer on an electrode is positioned so that said dot electrodes of said photoreceptor and said insulating layer of said recorder may be faced with each other.
  • a potential is applied to said transparent electrode of said photoreceptor and said electrode of said recorder, and under this potential applying condition, they are exposed to light, whereby a charged image is formed on said recorder.
  • the present invention relates to a recording method for converting a light image to a charged image.
  • the present invention aims to overcome the defect seen in the above-mentioned patents and patent publication.
  • the present invention employs a photoreceptor comprising a transparent support, a transparent electrode on said support, a photoconductor layer on said transparent electrode and a plurality of separate dot electrodes on said layer whereby after projecting a light image a charge is transferred to said dot electrodes smoothly, and taking advantage of the remarkably low resistivity of this exposed portion, the charge is transferred to an insulating layer of a recorder easily.
  • FIG. 1 denotes the principle of the present invention
  • FIG. 2 denotes a schematic representation of an electrostatic image recording device for use in the method of the present invention.
  • a photoreceptor 1 for use in the method of the present invention is prepared through the steps of NESA-treating or treating in any other way a transparent support 2 of quartz glass or the like to provide a transparent electrode 3 on said transparent support 2, evaporating onto said transparent electrode 3 a monomer of a photoconductor such as Se, ZnO, CdS, (Cd, Zn)S or N-polyvinyl-carbazole or a mixture thereof with a binder of a proper synthetic resin or dissolving it in a proper solvent and applying the solution onto said transparent electrode to provide a photoconductor layer 4, and arranging a plurality of separate dot electrodes 5 on said layer 4.
  • a photoconductor such as Se, ZnO, CdS, (Cd, Zn)S or N-polyvinyl-carbazole or a mixture thereof
  • a binder of a proper synthetic resin or dissolving it in a proper solvent and applying the solution onto said transparent electrode to provide a photocon
  • the dot electrodes 5 may be formed by another method wherein a uniform metal layer is previously prepared on the photoconductor layer 4 by evaporation and it is made to dots by a general photoetching.
  • the shapes of these dot electrodes 5 may be proper, for example, they may be spherical or cylindrical, and the spaces among the electrodes are properly determined by how much the mesh eifect of a final image is required.
  • the heights of the dot electrodes 5 are desired to be uniform if possible. Further, in case that said dot electrodes 5 are made of rhodium or rhodium is evaporated to the dot electrodes 5 made of copper, the photoreceptor 1 is made more durable against the repetition of use.
  • a recorder 6 has an insulating layer 8 on a conductive electrode 7, and this recorder 6 is positioned face to face and in contact with the dot electrodes 5 of said photoreceptor 1.
  • the insulating layer 8 may be separated from the electrode 7, for example, the electrode 7 may be a metal plate and the insulating layer 8 may be a sheet of paper applied insulation treating, and in this case the portion of said insulating paper contacted with the electrode 7 is desired to be treated con.- ductively.
  • the transparent electrode 2 and the electrode 7 of the recorder 6 are connected to a power source 9 so that high potential may be applied thereto.
  • the polarity of the potential is determined properly by the characteristic of the semiconductor forming the photoconductor layer 4, that is, whether the semiconductor is N- type or P-type, which is required as a final visible image between a negative image and a positive image or what is the polarity of the toner to be used in development.
  • any developer may be used as far as it is a pigmented material which is attractable to a charged image by electrostatic force.
  • a high potential is applied to the photoreceptor 1 and the recorder 6 which are faced and contacted with each other.
  • the resistivity of the portion onto which the optical image is projected is dropped in accordance with the intensity of the projected light, and the charge of this portion is transferred to the recorder 6 through said dot electrodes 5.
  • the decrease of the resistivity and the charge transfer are effected quite preferable through the dot electrodes 5 provided in the photoreceptor 1, and a high contrast charged image is formed on the recorder 6.
  • FIG. 2 denotes an electrostatic recording apparatus for use in an embodiment of the present invention.
  • a photoreceptor 21 also comprises a transparent support 22, a transparent electrode 23, a photoconductor layer 2.4 and dot electrodes 25.
  • a reference number 26 denotes a metal electrode plate.
  • a power source 27 serves for applying potential of different polarities to said transparent electrode 23 of said photoreceptor 21 and said electrode plate 26.
  • a rolled recording paper 28 has an insulating layer. 29 denotes a subject such as an original or the like, and 30 denotes a projection lens, respectively.
  • a drawn-out portion 28a of said rolled recording paper 28 is put between said photoreceptor 21 and said electrode plate 26 with its insulating layer facing said dot electrodes 25.
  • the developing means 33 is not restricted to the above-mentioned one, but a general developing means for use in electrophotographic processes is used properly. Further, as recording paper, out sheets may be used instead of the above-mentioned rolled paper. Further, in the case that the subject 29 is such as a photographic film, it is of course that the subject may be exposed to light in contact with the transparent support 22 of the photoreceptor 21.
  • An electrostatic image recording method which is characterized in comprising the steps of preparing a photoreceptor comprising a transparent support, a transparent conductive electrode on said support, a photoconductor layer on said electrode and a plurality of separate dot electrodes of conductive material disposed in closely spaced relationship on said photoconductor layer with said photoconductor layer being disposed between said conductive electrode and said dot electrodes and a recorder having an insulating layer on an electrode disposing said electrodes of said photoreceptor and said insulating layer of said recorder in face-to-face relationship with each other, applying a potential to said transparent electrode of said photoreceptor and said electrode of said recorder, and exposing said photoreceptor to light in this state whereby a charged image is formed on said recorder.
  • a system for recording an electrostatic image comprising:
  • a photoreceptor including a transparent support, a transparent conductive layer disposed on one surface of said support, a photoconductive layer disposed on the opposite surface of said conductive layer, and a plurality of individual conductive dots disposed in closely spaced relationship over the surface of said photoconductive layer with said photoconductive layer being disposed entirely between said conductive dots and said conductive layer,
  • a recorder including an insulating layer disposed on a conductive support, said insulating layer and said conductive dots being disposed in face-to-face spaced relationship, and

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Photoreceptors In Electrophotography (AREA)
US00054239A 1969-07-11 1970-07-13 Electrostatic imaging employing a dot electrode Expired - Lifetime US3730710A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP44055225A JPS4910703B1 (enrdf_load_stackoverflow) 1969-07-11 1969-07-11

Publications (1)

Publication Number Publication Date
US3730710A true US3730710A (en) 1973-05-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00054239A Expired - Lifetime US3730710A (en) 1969-07-11 1970-07-13 Electrostatic imaging employing a dot electrode

Country Status (4)

Country Link
US (1) US3730710A (enrdf_load_stackoverflow)
JP (1) JPS4910703B1 (enrdf_load_stackoverflow)
FR (1) FR2055072A5 (enrdf_load_stackoverflow)
GB (1) GB1317017A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4097277A (en) * 1973-01-31 1978-06-27 Canon Kabushiki Kaisha Photosensitive member having layer of vinyl carbazole polymer containing antimony chalcogen compound of antimony and sulfur
US4263359A (en) * 1979-04-05 1981-04-21 E. I. Du Pont De Nemours And Company Charge receptor film for charge transfer imaging
US4797695A (en) * 1985-06-13 1989-01-10 Seikosha Co., Ltd. Electrophotographic recording system
US5082756A (en) * 1989-02-16 1992-01-21 Minolta Camera Kabushiki Kaisha Photosensitive member for retaining electrostatic latent images
US5298947A (en) * 1989-11-16 1994-03-29 Dai Nippon Printing Co., Ltd. Process for recording images on an electrostatic information recording medium with delayed disconnection of charge accumulation voltage
EP0592662B1 (en) * 1989-03-16 2000-02-02 Dai Nippon Printing Co., Ltd. Electrostatic information recording and reproducing method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0454869B1 (en) * 1989-11-17 1998-04-08 Dai Nippon Printing Co., Ltd. Electrostatic information recording medium and electrostatic information recording/reproducing method
JP3015178U (ja) * 1995-02-27 1995-08-29 株式会社織田島器物製作所 液体容器

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4097277A (en) * 1973-01-31 1978-06-27 Canon Kabushiki Kaisha Photosensitive member having layer of vinyl carbazole polymer containing antimony chalcogen compound of antimony and sulfur
US4263359A (en) * 1979-04-05 1981-04-21 E. I. Du Pont De Nemours And Company Charge receptor film for charge transfer imaging
US4797695A (en) * 1985-06-13 1989-01-10 Seikosha Co., Ltd. Electrophotographic recording system
US5082756A (en) * 1989-02-16 1992-01-21 Minolta Camera Kabushiki Kaisha Photosensitive member for retaining electrostatic latent images
EP0592662B1 (en) * 1989-03-16 2000-02-02 Dai Nippon Printing Co., Ltd. Electrostatic information recording and reproducing method
US5298947A (en) * 1989-11-16 1994-03-29 Dai Nippon Printing Co., Ltd. Process for recording images on an electrostatic information recording medium with delayed disconnection of charge accumulation voltage

Also Published As

Publication number Publication date
GB1317017A (en) 1973-05-16
DE2034239A1 (de) 1971-02-25
JPS4910703B1 (enrdf_load_stackoverflow) 1974-03-12
FR2055072A5 (enrdf_load_stackoverflow) 1971-05-07
DE2034239B2 (de) 1974-05-02

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