GB1076595A - Electrostatic developing apparatus and method - Google Patents

Electrostatic developing apparatus and method

Info

Publication number
GB1076595A
GB1076595A GB36961/64A GB3696164A GB1076595A GB 1076595 A GB1076595 A GB 1076595A GB 36961/64 A GB36961/64 A GB 36961/64A GB 3696164 A GB3696164 A GB 3696164A GB 1076595 A GB1076595 A GB 1076595A
Authority
GB
United Kingdom
Prior art keywords
drum
image
sheet
corona discharge
fed
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
GB36961/64A
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.)
AB Dick Co
Original Assignee
Multigraphics Inc
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 Multigraphics Inc filed Critical Multigraphics Inc
Publication of GB1076595A publication Critical patent/GB1076595A/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
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/138—Corona discharge process

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Abstract

1,076,595. Electro-photographic processes. ADDRESSOGRAPH-MULTIGRAPH CORPORATION. Sept. 9, 1964 [Sept. 10, 1963], No. 36961/64. Heading G2H. In a process for developing an electrostatic image, toner particles are repelled from discharged areas by a positive corona discharge directed at the rear of an image bearing element, while developer is applied to the front of the element. As shown, a sheet 12 of paper having a photo-conductive insulating layer bearing a charge image on its underside is fed from a sensitizing and exposing section of a copying apparatus to a developing section. Positively charged toner particles are carried on a magnetic brush, created, around a rotating drum 44, by a permanent magnet 46. The developer mix is fed to the drum by members 40 and 42 and removed from it by member 48. A wire 28 is mounted between insulators 82 on a guide member 52, and is maintained at a positive potential of 4-6, 000 volts. Drum 44 is made of conductive material and is at ground potential. The corona discharge produces a microamp current from the drum to ground. A permanent magnet 98 removes iron particles which have been carried on to the back of sheet 12. The sheet is fed out of the developing section by nap surfaced rollers 54 and 56. When used in reversal printing, the corona discharge enables the toner to be evenly applied to the non-image areas and prevents the iron particles from being retained on the image areas.
GB36961/64A 1963-09-10 1964-09-09 Electrostatic developing apparatus and method Expired GB1076595A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US307887A US3369917A (en) 1963-09-10 1963-09-10 Magnetic brush development of electrostatic images utilizing a high voltage corona

Publications (1)

Publication Number Publication Date
GB1076595A true GB1076595A (en) 1967-07-19

Family

ID=23191585

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36961/64A Expired GB1076595A (en) 1963-09-10 1964-09-09 Electrostatic developing apparatus and method

Country Status (3)

Country Link
US (1) US3369917A (en)
DE (1) DE1472904B1 (en)
GB (1) GB1076595A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877963A (en) * 1973-01-10 1975-04-15 Masamichi Sato Reversal liquid developing using a development electrode and corona charging
US3916870A (en) * 1974-10-31 1975-11-04 Pelsue T A Co Heater-blower assembly
US4131360A (en) * 1977-05-27 1978-12-26 Xerox Corporation Duplex reproduction system employing copy sheet cleaner
US4640859A (en) * 1983-12-27 1987-02-03 Minnesota Mining And Manufacturing Company Inelastic, heat-elasticizable sheet material for diapers

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2297691A (en) * 1939-04-04 1942-10-06 Chester F Carlson Electrophotography
NL91382C (en) * 1948-04-17 1959-07-15 Battelle Memorial Institute Method for electrostatically transferring images in powder from an image plate to a carrier
US2854947A (en) * 1953-07-01 1958-10-07 Rca Corp Electrostatic printing
US2965573A (en) * 1958-05-02 1960-12-20 Haloid Xerox Inc Xerographic developer
US2952241A (en) * 1955-02-03 1960-09-13 Haloid Xerox Inc Developer electrode for electrophotographic apparatus
US2956487A (en) * 1955-03-23 1960-10-18 Rca Corp Electrostatic printing
BE546297A (en) * 1955-03-23
US3117884A (en) * 1955-03-23 1964-01-14 Rca Corp Electrostatic printing process and apparatus
US2890968A (en) * 1955-06-02 1959-06-16 Rca Corp Electrostatic printing process and developer composition therefor
US2965481A (en) * 1955-08-01 1960-12-20 Haloid Xerox Inc Electrostatic charging and image formation
US2815449A (en) * 1955-08-01 1957-12-03 Rca Corp Electrostatic photography
US2951443A (en) * 1956-12-27 1960-09-06 Haloid Xerox Inc Image reproduction
BE564031A (en) * 1957-01-18
US2904000A (en) * 1957-05-15 1959-09-15 Century Geophysical Corp Magnetic-brush developer
US3037478A (en) * 1957-10-23 1962-06-05 American Photocopy Equip Co Apparatus for developing electrophotographic sheet
US3011473A (en) * 1958-05-01 1961-12-05 Xerox Corp Xerographic apparatus
US3058444A (en) * 1959-03-13 1962-10-16 American Photocopy Equip Co Apparatus for developing electrostatic image on electrographic sheet
US3094429A (en) * 1959-07-31 1963-06-18 Burroughs Corp Method of electrostatic recording with different inkse
US3088386A (en) * 1959-11-16 1963-05-07 American Photocopy Equip Co Electrophotographic photocopy machine
US3145122A (en) * 1962-08-13 1964-08-18 Addressograph Multigraph Apparatus for applying developer powder to photo-conductive insulating material
US3150003A (en) * 1962-11-01 1964-09-22 Xerox Corp Apparatus for transferring xerographic images
US3232190A (en) * 1963-06-28 1966-02-01 Ibm Method and apparatus for copying

Also Published As

Publication number Publication date
US3369917A (en) 1968-02-20
DE1472904B1 (en) 1970-02-19

Similar Documents

Publication Publication Date Title
US4030447A (en) Developing device
US2951443A (en) Image reproduction
JP2809410B2 (en) Highlight color imaging system
US5031570A (en) Printing apparatus and toner/developer delivery system therefor
GB1016836A (en) Electrophotographic copying apparatus
GB1450690A (en) Electrophotography
GB1031986A (en) Improvements in systems for differential transfer of powder developed electrostatic images
US5144371A (en) Dual AC/dual frequency scavengeless development
GB1500843A (en) Process and apparatus for developing a latent electrostatic image on an electrophotographic copying material
US4432631A (en) Photoconductor charging technique
US3011473A (en) Xerographic apparatus
US3589895A (en) Electrographic developing method suited for transfer electrophotography without cleaning
US3696785A (en) Development apparatus
US4792775A (en) Method for the formation of outline images corresponding to the peripheral outlines of document's images
GB1259880A (en) Development of electrostatic images
US3464818A (en) Method of photoelectric copying
US3882822A (en) Apparatus for Developing Electrostatic Latent Images
GB1376278A (en) Electro photographic copying methods
GB987285A (en) Half-tone electrophotography
US4351603A (en) Electronic copying apparatus
US3645618A (en) Vacuum nozzle to remove agglomerates on a toner applicator
CA1046268A (en) Continuous bias control for electrographic development apparatus
USRE31371E (en) Developing system
GB1076595A (en) Electrostatic developing apparatus and method
US4052127A (en) Developing system