FR2454646A1 - Procede pour ameliorer la densite maximale et l'intervalle des tonalites des images electrographiques et appareil pour la mise en oeuvre de ce procede - Google Patents

Procede pour ameliorer la densite maximale et l'intervalle des tonalites des images electrographiques et appareil pour la mise en oeuvre de ce procede

Info

Publication number
FR2454646A1
FR2454646A1 FR8008381A FR8008381A FR2454646A1 FR 2454646 A1 FR2454646 A1 FR 2454646A1 FR 8008381 A FR8008381 A FR 8008381A FR 8008381 A FR8008381 A FR 8008381A FR 2454646 A1 FR2454646 A1 FR 2454646A1
Authority
FR
France
Prior art keywords
maximum density
toner
tones
interval
improving
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
FR8008381A
Other languages
English (en)
French (fr)
Other versions
FR2454646B1 (de
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=FR2454646(A1) "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
Publication of FR2454646A1 publication Critical patent/FR2454646A1/fr
Application granted granted Critical
Publication of FR2454646B1 publication Critical patent/FR2454646B1/fr
Granted 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)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Liquid Crystal (AREA)
  • Paper (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
FR8008381A 1979-04-16 1980-04-15 Procede pour ameliorer la densite maximale et l'intervalle des tonalites des images electrographiques et appareil pour la mise en oeuvre de ce procede Granted FR2454646A1 (fr)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
FR2454646A1 true FR2454646A1 (fr) 1980-11-14
FR2454646B1 FR2454646B1 (de) 1983-12-09

Family

ID=21855368

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8008381A Granted FR2454646A1 (fr) 1979-04-16 1980-04-15 Procede pour ameliorer la densite maximale et l'intervalle des tonalites des images electrographiques et appareil pour la mise en oeuvre de ce procede

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.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3335003A (en) * 1963-10-09 1967-08-08 Xerox Corp Reflex xerographic process
US3341326A (en) * 1962-10-01 1967-09-12 Xerox Corp Dark decay controlled xerography
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
US4076857A (en) * 1976-06-28 1978-02-28 Eastman Kodak Company Process for developing electrographic images by causing electrical breakdown in the developer

Family Cites Families (8)

* 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
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3341326A (en) * 1962-10-01 1967-09-12 Xerox Corp Dark decay controlled xerography
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
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
AU5751880A (en) 1980-10-23
AU536674B2 (en) 1984-05-17
EP0018742B2 (de) 1988-08-24
FR2454646B1 (de) 1983-12-09
DE3014449A1 (de) 1980-10-30
DE3064518D1 (en) 1983-09-15
EP0018742A1 (de) 1980-11-12
BR8002337A (pt) 1980-12-02
EP0018742B1 (de) 1983-08-10
DE3014449C2 (de) 1986-03-27
ATE4435T1 (de) 1983-08-15
JPS5619067A (en) 1981-02-23
JPH0210954B2 (de) 1990-03-12

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Legal Events

Date Code Title Description
ST Notification of lapse