GB1240293A - Electrophotographic apparatus and method - Google Patents

Electrophotographic apparatus and method

Info

Publication number
GB1240293A
GB1240293A GB33313/68A GB3331368A GB1240293A GB 1240293 A GB1240293 A GB 1240293A GB 33313/68 A GB33313/68 A GB 33313/68A GB 3331368 A GB3331368 A GB 3331368A GB 1240293 A GB1240293 A GB 1240293A
Authority
GB
United Kingdom
Prior art keywords
image
toner
polarity
charged
brushed
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
GB33313/68A
Inventor
Ivan Bernard Ville
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 GB1240293A publication Critical patent/GB1240293A/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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
    • G03G21/0047—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium using electrostatic or magnetic means; Details thereof, e.g. magnetic pole arrangement of magnetic devices
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/0005—Cleaning of residual toner

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Color Electrophotography (AREA)

Abstract

1,240,293. Cleaning and developing xerographic surfaces. EASTMAN KODAK CO. July 12, 1968 [July 17, 1967], No.33313/68. Heading G2H. A xerographic process includes forming a latent electrostatic image on a surface by applying a sensitizing charge of a first polarity, imagewise exposing the surface, applying toner charged with a second polarity by brushing the surface after exposure in an electric field which urges residual toner having a charge of the first polarity away from background areas and image area and then brushing the surface in the presence of a second electrical field which urges toner, charged with the second polarity, toward the image areas and away from the background areas. In one embodiment, a surface 7, Fig. 1B, carrying a negatively charged image 2 is brushed with a brush 6 connected to a voltage source 8 which produces a field which urges positively charged toner towards the image and background areas while negatively charged toner is urged away from the surface 7. The surface 7 is then brushed with a brush 5 connected to a potential source 10 of,the same polarity but less magnitude than the charge image. In another embodiment, Fig. 2C (not shown) the charged surface (24) of a photo-conductive layer is brushed by a grounded magnetic brush (25) and then by a second magnetic brush (26) connected to a potential source (27) which urges toner from background areas. The process may be applied to a xerographic printer, Fig. 3, including a transparent drum 30 coated with a photo-conductive layer 32 exposed internally by a projector 34 to form a latent image brushed with first and second brushes 35, 36. A brush 40 cleans the inside of the drum after exposure by a lamp 41.
GB33313/68A 1967-07-17 1968-07-12 Electrophotographic apparatus and method Expired GB1240293A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US65393467A 1967-07-17 1967-07-17

Publications (1)

Publication Number Publication Date
GB1240293A true GB1240293A (en) 1971-07-21

Family

ID=24622856

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33313/68A Expired GB1240293A (en) 1967-07-17 1968-07-12 Electrophotographic apparatus and method

Country Status (4)

Country Link
US (1) US3589895A (en)
CA (1) CA929582A (en)
DE (1) DE1772876A1 (en)
GB (1) GB1240293A (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1192943B (en) * 1962-11-21 1965-05-13 Bolling Hall Sasnett Jun Self-supporting fuel pump housing suitable for accommodating any pump system
US3784302A (en) * 1968-10-03 1974-01-08 Xerox Corp Electrophoretic imaging apparatus including application of dynamic stress on the particle suspension
US3767446A (en) * 1969-07-03 1973-10-23 Xerox Corp Development method with oscillating brush pad
US3841892A (en) * 1970-11-23 1974-10-15 Ibm Method for transferring developed image
US3691993A (en) * 1970-11-23 1972-09-19 Ibm Apparatus for transferring developed image
US3754962A (en) * 1970-12-21 1973-08-28 Ibm Development of electrostatic images
US3850662A (en) * 1971-09-10 1974-11-26 Kalle Ag Electrophotographic developing process and apparatus
US3920453A (en) * 1972-01-28 1975-11-18 Addressograph Multigraph Method of electrostatic duplicating by image transfer
US3836381A (en) * 1972-10-02 1974-09-17 Secretary Supply Australia Method of developing a dielectric pattern on a semiconductor surface using a two-component developer
US3901189A (en) * 1974-01-28 1975-08-26 Xerox Corp Magnetic brush developing apparatus
US4083326A (en) * 1977-02-28 1978-04-11 Eastman Kodak Company Single component developer applicator apparatus
JPS55118059A (en) * 1979-03-05 1980-09-10 Canon Inc Developing method
US4384545A (en) * 1979-08-03 1983-05-24 Xerox Corporation Development system
JPS5898747A (en) * 1981-12-08 1983-06-11 Canon Inc Image forming method
JP3158491B2 (en) * 1991-05-29 2001-04-23 ミノルタ株式会社 Image forming device
ATE314324T1 (en) * 2001-06-12 2006-01-15 Schott Ag METHOD FOR PRODUCING BOROSILICATE GLASSES

Also Published As

Publication number Publication date
CA929582A (en) 1973-07-03
DE1772876A1 (en) 1970-11-12
US3589895A (en) 1971-06-29

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