GB1210021A - Methods of electrophotography - Google Patents

Methods of electrophotography

Info

Publication number
GB1210021A
GB1210021A GB42251/68A GB4225168A GB1210021A GB 1210021 A GB1210021 A GB 1210021A GB 42251/68 A GB42251/68 A GB 42251/68A GB 4225168 A GB4225168 A GB 4225168A GB 1210021 A GB1210021 A GB 1210021A
Authority
GB
United Kingdom
Prior art keywords
field
photo
uniform light
light source
layer
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
Application number
GB42251/68A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Katsuragawa Electric Co Ltd
Original Assignee
Katsuragawa Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Katsuragawa Electric Co Ltd filed Critical Katsuragawa Electric Co Ltd
Publication of GB1210021A publication Critical patent/GB1210021A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G03G15/056—Apparatus for electrographic processes using a charge pattern using internal polarisation
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/056—Electrographic processes using a charge pattern using internal polarisation
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/22—Processes involving a combination of more than one step according to groups G03G13/02 - G03G13/20

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Projection Apparatus (AREA)
  • Photoreceptors In Electrophotography (AREA)

Abstract

1,210,021. 021. Electro-photographic processes. KATSURAGAWA DENKI K. K. Sept. 5, 1968 [Sept. 5, 1967], No.42251/68. Heading G2H. A method of electro-photography uses a photosensitive element which includes a layer of photoconductive material, a thin transparent highly insulative layer integrally bonded to one side of the photo-conductive layer and a transparent backing electrode on the opposite side of the photo-conductive layer, the method comprising a first step in which a field of one polarity is applied across the element and a second step in which a second field is applied across the element having a component opposite to that of the first field concurrently with the projection of a light image on the surface of the highly insulative layer, wherein concurrently with the application of the first field the element is irradiated with uniform light through the transparent backing electrode prior to projection of the light image. As shown, the photo-sensitive element is mounted upon a glass cylinder 25 with the highly insulative layer on the outside. Uniform light source 2 is located within the cylinder opposite a negative corona discharge electrode 1. A light image from a document 9 is projected by a lens 8 through a positive corona discharge electrode 8 on to the surface of the photo-sensitive element. An additional uniform light source 4 may be provided outside the cylinder. The photo-sensitive element may be provided with thin transparent insulative layers on both sides. The uniform light source 2 may be positioned before or after the point of application of the first field. The second field may be a pure D. C. field or a pulsating or alternating field.
GB42251/68A 1967-09-05 1968-09-05 Methods of electrophotography Expired GB1210021A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5694767 1967-09-05

Publications (1)

Publication Number Publication Date
GB1210021A true GB1210021A (en) 1970-10-28

Family

ID=13041728

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42251/68A Expired GB1210021A (en) 1967-09-05 1968-09-05 Methods of electrophotography

Country Status (6)

Country Link
US (1) US3655369A (en)
FR (1) FR1579251A (en)
GB (1) GB1210021A (en)
NL (1) NL152091B (en)
SE (1) SE350136B (en)
SU (1) SU555867A3 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS494337B1 (en) * 1969-07-28 1974-01-31
JPS4938170B1 (en) * 1969-12-17 1974-10-16
JPS495466B1 (en) * 1970-12-29 1974-02-07
JPS5381121A (en) * 1976-12-27 1978-07-18 Kip Kk Method of taking electrophotography and device therefor
JPS6027026B2 (en) * 1977-06-17 1985-06-26 キヤノン株式会社 Electrophotographic method and apparatus
JPS5460938A (en) * 1977-10-22 1979-05-16 Ricoh Co Ltd Electrophotographic method
DE3039118A1 (en) * 1979-10-18 1981-04-30 Minolta Camera K.K., Osaka ELECTROPHOTOGRAPHIC COPYING PROCESS
US4444859A (en) * 1981-05-30 1984-04-24 Olympus Optical Company Limited Electrophotographic process and photosensitive member for use in said process

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2833648A (en) * 1953-07-16 1958-05-06 Haloid Co Transfer of electrostatic charge pattern
US3005707A (en) * 1956-04-16 1961-10-24 Leonard E Ravich Devices exhibiting persistent internal polarization and methods of utilizing the same
US3268331A (en) * 1962-05-24 1966-08-23 Itek Corp Persistent internal polarization systems
US3337339A (en) * 1962-10-01 1967-08-22 Xerox Corp Screen xerography
US3457070A (en) * 1964-07-25 1969-07-22 Matsuragawa Electric Co Ltd Electrophotography
US3511651A (en) * 1966-08-22 1970-05-12 Owens Illinois Inc Persistent internal polarization imaging system with electrophoretic development
US3438706A (en) * 1966-10-07 1969-04-15 Canon Kk Electrophotographic device

Also Published As

Publication number Publication date
DE1797243A1 (en) 1971-09-23
US3655369A (en) 1972-04-11
FR1579251A (en) 1969-08-22
DE1797243B2 (en) 1976-10-14
SU555867A3 (en) 1977-04-25
SE350136B (en) 1972-10-16
NL152091B (en) 1977-01-17
NL6812550A (en) 1969-03-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years