EP0288540A1 - High-quality color printer - Google Patents

High-quality color printer

Info

Publication number
EP0288540A1
EP0288540A1 EP19870907565 EP87907565A EP0288540A1 EP 0288540 A1 EP0288540 A1 EP 0288540A1 EP 19870907565 EP19870907565 EP 19870907565 EP 87907565 A EP87907565 A EP 87907565A EP 0288540 A1 EP0288540 A1 EP 0288540A1
Authority
EP
European Patent Office
Prior art keywords
particles
softening temperature
dye
hydrophobic
polymeric surface
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.)
Withdrawn
Application number
EP19870907565
Other languages
German (de)
French (fr)
Inventor
Kenneth W. Gardiner
Ronald Swidler
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.)
SRI International Inc
Original Assignee
SRI International Inc
Stanford Research Institute
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 SRI International Inc, Stanford Research Institute filed Critical SRI International Inc
Publication of EP0288540A1 publication Critical patent/EP0288540A1/en
Withdrawn legal-status Critical Current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
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/12—Developers with toner particles in liquid developer mixtures
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
    • G03G7/006—Substrates for image-receiving members; Image-receiving members comprising only one layer
    • G03G7/0073—Organic components thereof
    • G03G7/008—Organic components thereof being macromolecular
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/12—Developers with toner particles in liquid developer mixtures
    • G03G9/122—Developers with toner particles in liquid developer mixtures characterised by the colouring agents

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Liquid Developers In Electrophotography (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)

Abstract

Un colorant électrostatique liquide comporte essentiellement un solvant hydrophobe inerte dans lequel sont dispersées des particules de matière tinctoriale, ces particules étant pratiquement insolubles dans le solvant et étant solubles dans une surface polymère hydrophobe à des températures supérieures à la température de ramollissement de cette dernière, ainsi qu'un agent de modulation de fonçage qui de préférence se répartit sur les particules de matière tinctoriale. Est également décrit un procédé d'impression électrostatique consistant à mettre en contact avec la surface polymère hydrophobe d'une feuille un colorant électrostatique liquide imagé du type décrit, la surface polymère hydrophobe présentant une température de ramollissement, et à chauffer la surface polymérique à au moins la température de ramollissement précitée. On obtient ainsi des images couleur très nettes. La reproduction d'images en couleur pure à partir d'une mémoire d'ordinateur est une caractéristique particulière de la présente invention.A liquid electrostatic dye essentially comprises an inert hydrophobic solvent in which particles of dye material are dispersed, these particles being practically insoluble in the solvent and being soluble in a hydrophobic polymer surface at temperatures above the softening temperature of the latter, thus than a sinking modulation agent which is preferably distributed over the particles of dye material. Also described is an electrostatic printing process comprising contacting the hydrophobic polymeric surface of a sheet with an imaged liquid electrostatic dye of the type described, the hydrophobic polymeric surface having a softening temperature, and heating the polymeric surface to at minus the aforementioned softening temperature. Very clear color images are thus obtained. Reproducing pure color images from computer memory is a particular feature of the present invention.

EP19870907565 1986-11-05 1987-10-28 High-quality color printer Withdrawn EP0288540A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US92732886A 1986-11-05 1986-11-05
US927328 1986-11-05

Publications (1)

Publication Number Publication Date
EP0288540A1 true EP0288540A1 (en) 1988-11-02

Family

ID=25454579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870907565 Withdrawn EP0288540A1 (en) 1986-11-05 1987-10-28 High-quality color printer

Country Status (5)

Country Link
EP (1) EP0288540A1 (en)
JP (1) JPH01501258A (en)
DE (1) DE3790582T1 (en)
GB (1) GB2204419A (en)
WO (1) WO1988003669A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4946753A (en) * 1988-12-02 1990-08-07 Minnesota Mining And Manufacturing Company Liquid electrophotographic toners
US5061583A (en) * 1990-01-19 1991-10-29 Minnesota Mining And Manufacturing Company Color electrophotography for high quality half-tone images
WO1993001528A1 (en) * 1991-07-04 1993-01-21 Spectrum Sciences B.V. Security toner and process for using same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE628825A (en) * 1962-03-01
CA917987A (en) * 1969-02-05 1973-01-02 W. Jones Rexford Molecularly dispersed dye images
DE2020812B2 (en) * 1970-04-28 1974-08-08 Mita Industrial Co. Ltd., Osaka (Japan) Electrophotographic suspension developer
CH568595A5 (en) * 1972-03-23 1975-10-31 Canon Kk Transfer of images - obtd by wet development of electrostatic latent images
DE2450500A1 (en) * 1974-10-24 1976-05-06 Renker Gmbh Transfer printing directly from electrophotographic material - with toner image contg sublimation dyes, for sharp multi-coloured prints

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8803669A1 *

Also Published As

Publication number Publication date
JPH01501258A (en) 1989-04-27
GB8814495D0 (en) 1988-07-27
WO1988003669A1 (en) 1988-05-19
DE3790582T1 (en) 1988-09-15
GB2204419A (en) 1988-11-09

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19880728

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): FR IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19910501