DE3064518D1 - Method of improving maximum density and tonal range of electrographic images and an electrographic copying apparatus using the method - Google Patents

Method of improving maximum density and tonal range of electrographic images and an electrographic copying apparatus using the method

Info

Publication number
DE3064518D1
DE3064518D1 DE8080301189T DE3064518T DE3064518D1 DE 3064518 D1 DE3064518 D1 DE 3064518D1 DE 8080301189 T DE8080301189 T DE 8080301189T DE 3064518 T DE3064518 T DE 3064518T DE 3064518 D1 DE3064518 D1 DE 3064518D1
Authority
DE
Germany
Prior art keywords
electrographic
maximum density
images
copying apparatus
toner
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
DE8080301189T
Other languages
English (en)
Inventor
George Philip Kasper
Arthur Stanley Kroll
Michael Mosehauer
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=21855368&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3064518(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Application granted granted Critical
Publication of DE3064518D1 publication Critical patent/DE3064518D1/de
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
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/04027—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material and forming half-tone image

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Dry Development In Electrophotography (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Liquid Crystal (AREA)
  • Paper (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
DE8080301189T 1979-04-16 1980-04-15 Method of improving maximum density and tonal range of electrographic images and an electrographic copying apparatus using the method Expired DE3064518D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3066879A 1979-04-16 1979-04-16

Publications (1)

Publication Number Publication Date
DE3064518D1 true DE3064518D1 (en) 1983-09-15

Family

ID=21855368

Family Applications (2)

Application Number Title Priority Date Filing Date
DE3014449A Expired DE3014449C2 (de) 1979-04-16 1980-04-15 Elektrographisches Kopierverfahren
DE8080301189T Expired DE3064518D1 (en) 1979-04-16 1980-04-15 Method of improving maximum density and tonal range of electrographic images and an electrographic copying apparatus using the method

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE3014449A Expired DE3014449C2 (de) 1979-04-16 1980-04-15 Elektrographisches Kopierverfahren

Country Status (7)

Country Link
EP (1) EP0018742B2 (de)
JP (1) JPS5619067A (de)
AT (1) ATE4435T1 (de)
AU (1) AU536674B2 (de)
BR (1) BR8002337A (de)
DE (2) DE3014449C2 (de)
FR (1) FR2454646A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8400922A (nl) * 1984-03-23 1985-10-16 Oce Nederland Bv Werkwijze voor het vervaardigen van kopieen.

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2598732A (en) * 1949-03-09 1952-06-03 Haloid Co Electrophotography
DE1175985B (de) * 1959-11-05 1964-08-13 Agfa Ag Verfahren zur Herstellung elektro-photographischer Bilder
US3337339A (en) * 1962-10-01 1967-08-22 Xerox Corp Screen xerography
NL298605A (de) * 1962-10-01
US3335003A (en) * 1963-10-09 1967-08-08 Xerox Corp Reflex xerographic process
US3627526A (en) * 1969-12-29 1971-12-14 Rca Corp Electrophotographic recording elements with half-tone screen coatings thereon
US3681071A (en) * 1970-01-02 1972-08-01 Rca Corp Method of pressure treating electrophotographic recording elements to change their sensitivity to light
ZA73911B (en) * 1972-03-15 1973-11-28 Minnesota Mining & Mfg Electrographic development process
US3905822A (en) * 1973-10-23 1975-09-16 Xerox Corp Compound screen for object screening
US4051536A (en) * 1975-03-14 1977-09-27 Xerox Corporation Electronic halftone imaging system
US4083632A (en) * 1976-04-05 1978-04-11 Xerox Corporation Multi-frequency screen
JPS52143826A (en) * 1976-05-26 1977-11-30 Mita Industrial Co Ltd Electric recording method
US4076857A (en) * 1976-06-28 1978-02-28 Eastman Kodak Company Process for developing electrographic images by causing electrical breakdown in the developer

Also Published As

Publication number Publication date
JPS5619067A (en) 1981-02-23
EP0018742B2 (de) 1988-08-24
EP0018742A1 (de) 1980-11-12
FR2454646B1 (de) 1983-12-09
DE3014449A1 (de) 1980-10-30
FR2454646A1 (fr) 1980-11-14
BR8002337A (pt) 1980-12-02
AU5751880A (en) 1980-10-23
JPH0210954B2 (de) 1990-03-12
DE3014449C2 (de) 1986-03-27
EP0018742B1 (de) 1983-08-10
ATE4435T1 (de) 1983-08-15
AU536674B2 (en) 1984-05-17

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Legal Events

Date Code Title Description
8366 Restricted maintained after opposition proceedings
8339 Ceased/non-payment of the annual fee