[go: up one dir, main page]

GB1270273A - Improvements in and relating to electrophotography - Google Patents

Improvements in and relating to electrophotography

Info

Publication number
GB1270273A
GB1270273A GB36058/69A GB3605869A GB1270273A GB 1270273 A GB1270273 A GB 1270273A GB 36058/69 A GB36058/69 A GB 36058/69A GB 3605869 A GB3605869 A GB 3605869A GB 1270273 A GB1270273 A GB 1270273A
Authority
GB
United Kingdom
Prior art keywords
grid
voltage
july
photo
decreased
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
GB36058/69A
Inventor
Morris Burke Culhane
David Dufour Mcnair
Robert Kent Rickard
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB1270273A publication Critical patent/GB1270273A/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
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0291—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Abstract

1,270,273. Electrostatic charging apparatus. EASTMAN KODAK CO. July 17, 1969 [July 22, 1968], No.36058/69. Heading G2H. A photo-conductive surface 3 is uniformly charged by corona wires 1 within a shield 2 held at a high potential V 1 . A grid 6 held at a lower potential V 2 has wires decreasing in space towards the right. Where the spacing is at a maximum the ion leakage through the grid is at a maximum and vice versa. The surface 3 is moved in the direction of the arrow X and in so doing will be subjected to a high potential initially which then decreases to the voltage source 11. In other embodiments, the voltage across the grid is decreased in the direction of movement of the photo-conductor, Fig. 7 (not shown) or the spacing and voltage is decreased in this direction Fig. 9 (not shown).
GB36058/69A 1968-07-22 1969-07-17 Improvements in and relating to electrophotography Expired GB1270273A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74659668A 1968-07-22 1968-07-22

Publications (1)

Publication Number Publication Date
GB1270273A true GB1270273A (en) 1972-04-12

Family

ID=25001512

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36058/69A Expired GB1270273A (en) 1968-07-22 1969-07-17 Improvements in and relating to electrophotography

Country Status (4)

Country Link
US (1) US3527941A (en)
DE (1) DE1923968C3 (en)
FR (1) FR2013438A1 (en)
GB (1) GB1270273A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4112299A (en) * 1976-08-02 1978-09-05 Xerox Corporation Corona device with segmented shield
EP0028680A1 (en) * 1979-11-13 1981-05-20 International Business Machines Corporation Process of, and means for charging an imaging element in an electrophotographic machine
US5028779A (en) * 1984-11-01 1991-07-02 Xerox Corporation Corona charging device

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3635157A (en) * 1968-12-30 1972-01-18 Continental Can Co Method and apparatus for electrostatically charging particles for printing or coating
US3777214A (en) * 1968-12-30 1973-12-04 Continental Can Co Method and apparatus for electrostatically charging particles for printing or coating
US3688107A (en) * 1970-10-26 1972-08-29 Xerox Corp Electrostatographic charging apparatus
US3797927A (en) * 1971-05-20 1974-03-19 Canon Kk Electrophotographic copying machine
US3684364A (en) * 1971-06-24 1972-08-15 Xerox Corp Lift off electrode
DE2145268B2 (en) * 1971-09-10 1977-03-31 Hoechst Ag, 6000 Frankfurt CORONA DISCHARGE DEVICE
NL7305054A (en) * 1972-04-13 1973-10-16
CH549823A (en) * 1972-10-16 1974-05-31 Turlabor Ag ELECTROGRAPHIC COPYING PROCESS AND DEVICE FOR CARRYING OUT THIS PROCESS.
JPS5412062B2 (en) * 1973-06-14 1979-05-19
NL7601407A (en) * 1975-02-26 1976-08-30 Xerox Corp CORONA GENERATING DEVICE.
JPS5343537A (en) * 1976-10-01 1978-04-19 Olympus Optical Co Ltd Corona charger
US4088892A (en) * 1976-10-12 1978-05-09 Scott Paper Company Corona charging apparatus and method
US4141648A (en) * 1976-12-15 1979-02-27 International Business Machines Corporation Photoconductor charging technique
JPS54126032A (en) * 1978-03-24 1979-09-29 Ricoh Co Ltd Charger
JPS54156546A (en) * 1978-05-31 1979-12-10 Olympus Optical Co Ltd Corona charger
US4228480A (en) * 1979-02-12 1980-10-14 Eastman Kodak Company Electrophotographic apparatus with improved corona charging
JPS55144259A (en) * 1979-04-27 1980-11-11 Canon Inc Electrophotographic apparatus
US4245272A (en) * 1979-04-30 1981-01-13 Eastman Kodak Company Apparatus and method for low sensitivity corona charging of a moving photoconductor
JPS57124751A (en) * 1981-01-27 1982-08-03 Fuji Xerox Co Ltd Forming method for electrostatic recording picture image
JPS5825661A (en) * 1981-08-07 1983-02-15 Ricoh Co Ltd charging device
US4603964A (en) * 1984-10-22 1986-08-05 Xerox Corporation Photoreceptor charging scorotron
JPS63285570A (en) * 1987-05-18 1988-11-22 Minolta Camera Co Ltd Destaticizing separation device for electrostatic copying machine
JP2536550B2 (en) * 1987-10-16 1996-09-18 ミノルタ株式会社 Static eliminator of electrostatic copier
DE3908488A1 (en) * 1988-03-15 1989-09-28 Bando Chemical Ind Transfer and transport device
US5412212A (en) * 1993-12-06 1995-05-02 Eastman Kodak Company Corona-charging apparatus and method
US6134095A (en) * 1998-12-17 2000-10-17 May; John W. AC corona charger for an electrostatographic reproduction apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3160746A (en) * 1961-05-01 1964-12-08 Xerox Corp Corona charging apparatus for non-uniformly charging a xerographic plate in a predetermined manner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4112299A (en) * 1976-08-02 1978-09-05 Xerox Corporation Corona device with segmented shield
EP0028680A1 (en) * 1979-11-13 1981-05-20 International Business Machines Corporation Process of, and means for charging an imaging element in an electrophotographic machine
US5028779A (en) * 1984-11-01 1991-07-02 Xerox Corporation Corona charging device

Also Published As

Publication number Publication date
DE1923968B2 (en) 1978-06-15
FR2013438A1 (en) 1970-04-03
DE1923968C3 (en) 1979-02-15
US3527941A (en) 1970-09-08
DE1923968A1 (en) 1970-01-22

Similar Documents

Publication Publication Date Title
GB1270273A (en) Improvements in and relating to electrophotography
GB807798A (en) Electrostatic charging means and method
GB1220745A (en) Latch assemblies
GB1316469A (en) Electrophotographic apparatus
GB1399732A (en) Electrophotographic copying machine
GB1055416A (en) Two-wire corona discharge for electrostatic charge pattern formation
GB1165038A (en) Electrophotograpic Developing Process.
GB1135688A (en) Electrophotography
ES364888A1 (en) Electrostatic charging device utilizing both a.c. and d.c. fields
GB1322378A (en) Electrostatic charging device
GB1344908A (en) Electrophotographic method
GB1166464A (en) Xerographic Development
GB1349579A (en) Xerographic developing method
GB1496748A (en) Electrostatic image enhancement method and system for use in electron radiography
GB1317522A (en) Production of electrophotographic copies
JPS534549A (en) Magnetic toner
JPS5553370A (en) Developing device of one component toner
GB1186841A (en) A process of developing a latent electrostatic image
GB1135969A (en) Electrophotography
JPS55129360A (en) Electrostatic latent image formation method
GB813915A (en) Continuous tone reversal development process
JPS57172361A (en) Electrostatic recording device
JPS5284744A (en) Development means for electrostatic latent image
GB746905A (en) Improvements relating to electro-photographic systems
JPS5649281A (en) Electrostatic latent image former