EP0399478A3 - Method and apparatus for improving a multi-color electrophotographic image by buffing - Google Patents

Method and apparatus for improving a multi-color electrophotographic image by buffing Download PDF

Info

Publication number
EP0399478A3
EP0399478A3 EP19900109729 EP90109729A EP0399478A3 EP 0399478 A3 EP0399478 A3 EP 0399478A3 EP 19900109729 EP19900109729 EP 19900109729 EP 90109729 A EP90109729 A EP 90109729A EP 0399478 A3 EP0399478 A3 EP 0399478A3
Authority
EP
European Patent Office
Prior art keywords
image
medium
toned
carrier
color
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.)
Granted
Application number
EP19900109729
Other languages
German (de)
French (fr)
Other versions
EP0399478B1 (en
EP0399478A2 (en
Inventor
Lawrence Charles c/o Eastman Kodak Co. Steele
Kenneth Edward c/o Eastman Kodak Co. Rook
Domenic c/o Eastman Kodak Co. Santilli
Dennis Reed c/o Eastman Kodak Co. Kamp
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
Priority claimed from US07/358,916 external-priority patent/US5016054A/en
Priority claimed from US07/358,918 external-priority patent/US4998142A/en
Priority claimed from US07/358,101 external-priority patent/US4913992A/en
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of EP0399478A2 publication Critical patent/EP0399478A2/en
Publication of EP0399478A3 publication Critical patent/EP0399478A3/en
Application granted granted Critical
Publication of EP0399478B1 publication Critical patent/EP0399478B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G03G15/0142—Structure of complete machines
    • G03G15/0147—Structure of complete machines using a single reusable electrographic recording member
    • G03G15/0152—Structure of complete machines using a single reusable electrographic recording member onto which the monocolour toner images are superposed before common transfer from the recording member
    • G03G15/0157—Structure of complete machines using a single reusable electrographic recording member onto which the monocolour toner images are superposed before common transfer from the recording member with special treatment between monocolour image formation
    • 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
    • G03G13/01—Electrographic processes using a charge pattern for multicoloured copies
    • 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
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G03G15/0142—Structure of complete machines
    • G03G15/0147—Structure of complete machines using a single reusable electrographic recording member
    • G03G15/0152—Structure of complete machines using a single reusable electrographic recording member onto which the monocolour toner images are superposed before common transfer from the recording member
    • G03G15/0163—Structure of complete machines using a single reusable electrographic recording member onto which the monocolour toner images are superposed before common transfer from the recording member primary transfer to the final recording medium

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Color Electrophotography (AREA)
  • Liquid Developers In Electrophotography (AREA)
  • Wet Developing In Electrophotography (AREA)

Abstract

An improvement in the method and apparatus for producing a multi-color electrophotographic image wherein an electrophotographic medium (16) is mounted on a carrier (12) therefor and is translated over a predetermined path (14) so that the medium (16) is first charged, then exposed to a first light-borne image and then toned. Thus, the unexposed portions of the image bearing charged region of the medium (16) are toned, preferably by a liquid toner, to produce a first color visiblc image. The carrier (12) is then returned to the first position to repeat the foregoing steps to charge the medium and to expose it to a second light-borne image and to tone the second image with a second toning element to produce a second color visible image on the same sheet of medium (16). The improvement comprises means (31) for buffing the surface of the first toned image with a relatively coarse, stiff, and rough fibrous brush member after the first toning step and prior to the second charging step to smooth the previously toned image to prevent color contamination by subsequent imaging cycles. One of the images formed is a cyan image formed with an improved self-fixing, liquid electrographic developer comprising a volatile, electrically insulating liquid carrier and, dispersed in said carrier, (i) toner particles comprising a polymeric binder, cyan pigment and a dispersing agent whereby the cyan image does not flake off or smear during the buffing step.
EP19900109729 1989-05-26 1990-05-22 Method and apparatus for improving a multi-color electrophotographic image by buffing Expired - Lifetime EP0399478B1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US07/358,916 US5016054A (en) 1989-05-26 1989-05-26 Apparatus for improving a multi-color electrophotographic image
US358916 1989-05-26
US07/358,918 US4998142A (en) 1989-05-26 1989-05-26 Method of improving a multi-color electrophotographic image
US07/358,101 US4913992A (en) 1989-05-26 1989-05-26 Method of improving a multi-color electrophotographic image by buffing an image toned with an improved toner
US358918 1994-12-19
US358101 1999-07-21

Publications (3)

Publication Number Publication Date
EP0399478A2 EP0399478A2 (en) 1990-11-28
EP0399478A3 true EP0399478A3 (en) 1991-12-04
EP0399478B1 EP0399478B1 (en) 1994-04-13

Family

ID=27408336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900109729 Expired - Lifetime EP0399478B1 (en) 1989-05-26 1990-05-22 Method and apparatus for improving a multi-color electrophotographic image by buffing

Country Status (1)

Country Link
EP (1) EP0399478B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5506668A (en) * 1994-01-25 1996-04-09 Eastman Kodak Company Image forming apparatus having toner removing device
DE102004007193B4 (en) * 2004-02-13 2006-11-16 OCé PRINTING SYSTEMS GMBH Apparatus for removing toner particles, comprising a replaceable brush roller

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3467468A (en) * 1967-03-30 1969-09-16 Rca Corp Automatic color electrophotographic apparatus
US4659640A (en) * 1982-06-21 1987-04-21 Eastman Kodak Company Self-fixing liquid electrographic developers containing polyester toners and dispersed wax and processes for using the same
US4660503A (en) * 1986-03-10 1987-04-28 Eastman Kodak Company Method and apparatus for improving a multi-color electrophotographic image

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3467468A (en) * 1967-03-30 1969-09-16 Rca Corp Automatic color electrophotographic apparatus
US4659640A (en) * 1982-06-21 1987-04-21 Eastman Kodak Company Self-fixing liquid electrographic developers containing polyester toners and dispersed wax and processes for using the same
US4660503A (en) * 1986-03-10 1987-04-28 Eastman Kodak Company Method and apparatus for improving a multi-color electrophotographic image

Also Published As

Publication number Publication date
EP0399478B1 (en) 1994-04-13
EP0399478A2 (en) 1990-11-28

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