GB1389153A - System for reducing background developer deposition in an electrostatic copier - Google Patents

System for reducing background developer deposition in an electrostatic copier

Info

Publication number
GB1389153A
GB1389153A GB3208473A GB3208473A GB1389153A GB 1389153 A GB1389153 A GB 1389153A GB 3208473 A GB3208473 A GB 3208473A GB 3208473 A GB3208473 A GB 3208473A GB 1389153 A GB1389153 A GB 1389153A
Authority
GB
United Kingdom
Prior art keywords
potential
conductive
photo
drum
surface portion
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
GB3208473A
Inventor
I Smith
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.)
Savin Business Machines Corp
Original Assignee
Savin Business Machines Corp
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 Savin Business Machines Corp filed Critical Savin Business Machines Corp
Publication of GB1389153A publication Critical patent/GB1389153A/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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/065—Arrangements for controlling the potential of the developing electrode

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Wet Developing In Electrophotography (AREA)
  • Cleaning In Electrography (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Developing For Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

1389153 Electro-photographic liquid development SAVIN BUSINESS MACHINES CORP 5 July 1973 [17 Nov 1972] 32084/73 Heading G2H In an apparatus for liquid development of a latent electrostatic image on a drum 12 of the kind in which a biasing electrode 29 is associated with the developer unit 28, the drum 12 has a conductive substrate 13, a photo-conductive surface portion 16 and an electrically conductive surface portion 15 insulated from the substrate 13 and the photo-conductive portion 16. The portion 15 corresponds to the mirror return segment of the drum 12. A potential intermediate ground potential and the maximum potential of the charge image is applied to the biasing electrode 29 and also, during its movement adjacent to the developer unit 28, to the conductive surface portion 15. The apparatus may include a surface charge field sensor 52 to measure the residual background potential of a charged and exposed area of the photo-conductive portion 16 and voltage control means 54, 56 for adjusting the potential applied to the electrode 27 and to the portion 15 to equal the measured potential.
GB3208473A 1972-11-17 1973-07-05 System for reducing background developer deposition in an electrostatic copier Expired GB1389153A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US30757272A 1972-11-17 1972-11-17

Publications (1)

Publication Number Publication Date
GB1389153A true GB1389153A (en) 1975-04-03

Family

ID=23190326

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3208473A Expired GB1389153A (en) 1972-11-17 1973-07-05 System for reducing background developer deposition in an electrostatic copier

Country Status (6)

Country Link
US (1) US3782818A (en)
JP (1) JPS4983450A (en)
AU (1) AU5728573A (en)
DE (1) DE2336499A1 (en)
GB (1) GB1389153A (en)
IT (1) IT990811B (en)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972611A (en) * 1970-03-18 1976-08-03 Canon Kabushiki Kaisha Apparatus for transferring images produced by liquid developer
JPS5211595B2 (en) * 1972-09-29 1977-03-31
US4052127A (en) * 1973-01-24 1977-10-04 Ricoh Co., Ltd. Developing system
DE2403186C3 (en) * 1973-01-24 1985-11-21 Kabushiki Kaisha Ricoh, Tokio/Tokyo Developing device for an electrophotographic copier
US4129375A (en) * 1974-05-10 1978-12-12 Ricoh Company, Ltd. Method and apparatus for electrically biasing developing electrode of electrophotography device
US4050806A (en) * 1974-05-10 1977-09-27 Ricoh Co., Ltd. Method and apparatus for electrically biasing developing electrode of electrophotographic device
US3892481A (en) * 1974-06-17 1975-07-01 Savin Business Machines Corp Automatic development electrode bias control system
USRE31964E (en) * 1974-06-17 1985-08-06 Savin Corporation Automatic development electrode bias control system
US4141643A (en) * 1974-09-13 1979-02-27 Ricoh Company, Ltd. Developing electrode arrangement for electrophotographic apparatus
JPS5148341A (en) * 1974-10-24 1976-04-26 Ricoh Kk
JPS5815788B2 (en) * 1974-10-30 1983-03-28 株式会社リコー Development electrode control device
JPS5174634A (en) * 1974-12-24 1976-06-28 Ricoh Kk Denshishashinno baiasugenzohoho
JPS5187046A (en) * 1975-01-28 1976-07-30 Ricoh Kk Serufuootobaiasushikidenshishashingenzosochi
US3998538A (en) * 1975-02-24 1976-12-21 Xerox Corporation Electrometer apparatus for reproduction machines
JPS5911106B2 (en) * 1975-04-04 1984-03-13 株式会社リコー Auto bias development method
US3981267A (en) * 1975-05-20 1976-09-21 Savin Business Machines Corporation Electrophotographic liquid developing system
US4021112A (en) * 1975-06-23 1977-05-03 Xerox Corporation Photoreceptor dark current leakage detecting apparatus for xerographic machines
JPS5290942A (en) * 1976-01-26 1977-07-30 Canon Inc Electrostatic printing
US4044718A (en) * 1976-09-10 1977-08-30 Xonics, Inc. Electrostatic fountain developer
JPS552270A (en) * 1978-06-21 1980-01-09 Ricoh Co Ltd Bias device of copying machine
USRE30477E (en) * 1979-05-10 1981-01-13 Savin Corporation Electrophotographic liquid developing system
US4326796A (en) * 1979-12-13 1982-04-27 International Business Machines Corporation Apparatus and method for measuring and maintaining copy quality in an electrophotographic copier
JPS58162961A (en) * 1982-03-24 1983-09-27 Fuji Photo Film Co Ltd Manufacture of lithographic plate
US4491408A (en) * 1984-01-03 1985-01-01 Xerox Corporation Electrostatographic system development modulation
JPS61177478A (en) * 1985-02-01 1986-08-09 Dainippon Screen Mfg Co Ltd Device for loading sheet material onto drum
US4851317A (en) * 1987-11-04 1989-07-25 E. I. Du Pont De Nemours And Company Laminar flow toning station having conductive and nonconductive elements therein
US5021312A (en) * 1987-12-28 1991-06-04 Fuji Photo Film Co., Ltd. Apparatus and method for controlling the quantity of developer delivered to a film processing head
KR100768756B1 (en) * 2006-08-25 2007-10-23 박재홍 Rat guard for marine
DE102009060334B4 (en) * 2009-12-23 2012-02-16 OCé PRINTING SYSTEMS GMBH Device for developing charge images generated on a charge image carrier in an electrophoretic pressure device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346475A (en) * 1963-02-25 1967-10-10 Australia Res Lab Electrophotographic method using an unsymmetrical ac current during development
US3411482A (en) * 1967-01-30 1968-11-19 Varian Associates Electrographic toner development employing a clean-up electrode structure for removing unwanted background
US3576623A (en) * 1968-02-23 1971-04-27 Xerox Corp Development system employing a coronode immersed in a liquid developer
US3577259A (en) * 1968-09-19 1971-05-04 Xerox Corp Liquid development of electrostatic latent images utilizing a tonerfree zone
JPS5215976A (en) * 1975-07-28 1977-02-05 Hitachi Ltd Fluid pressure servo

Also Published As

Publication number Publication date
AU5728573A (en) 1975-01-09
DE2336499A1 (en) 1974-06-06
JPS4983450A (en) 1974-08-10
IT990811B (en) 1975-07-10
US3782818A (en) 1974-01-01

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed