EP0613572B1 - Procede et solvants pour le fixage d'un toner a base de polystyrene sur un support de reproduction d'un appareil d'impression ou de copie - Google Patents

Procede et solvants pour le fixage d'un toner a base de polystyrene sur un support de reproduction d'un appareil d'impression ou de copie Download PDF

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Publication number
EP0613572B1
EP0613572B1 EP92919887A EP92919887A EP0613572B1 EP 0613572 B1 EP0613572 B1 EP 0613572B1 EP 92919887 A EP92919887 A EP 92919887A EP 92919887 A EP92919887 A EP 92919887A EP 0613572 B1 EP0613572 B1 EP 0613572B1
Authority
EP
European Patent Office
Prior art keywords
solvent
fixing
toner
polystyrene
printing
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 - Lifetime
Application number
EP92919887A
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German (de)
English (en)
Other versions
EP0613572A1 (fr
Inventor
Gerd Goldmann
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.)
Canon Production Printing Germany GmbH and Co KG
Original Assignee
Wincor Nixdorf International GmbH
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 Wincor Nixdorf International GmbH filed Critical Wincor Nixdorf International GmbH
Priority to EP92919887A priority Critical patent/EP0613572B1/fr
Publication of EP0613572A1 publication Critical patent/EP0613572A1/fr
Application granted granted Critical
Publication of EP0613572B1 publication Critical patent/EP0613572B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G11/00—Selection of substances for use as fixing agents

Definitions

  • the invention relates to a method and a solvent for fixing a polystyrene-based toner on a recording medium of a printing or copying machine, the solvent being evaporated in a fixing device and acting on the toner in this state.
  • the object of the invention is therefore to provide a method and a solvent for fixing a polystyrene-based toner on a recording medium of a printing or copying machine, which causes minimal environmental pollution with regard to ozone depletion potential and greenhouse effect and, on the other hand, a consistently constant fixing quality even in the most varied constructed record carriers guaranteed.
  • Substances with the empirical formula C2HF3Cl2 are called partially halogenated chlorofluorocarbons or hydrofluoroalkals. They are particularly environmentally friendly. From these compounds of partially halogenated chlorofluorocarbons, the use of partially chlorinated fluorocarbons R123 and R141b has proven to be particularly favorable. Compared to toners with a non-crosslinked polymer matrix, whose polymer matrix consists of polystyrene and methacrylates, the partially chlorinated fluorocarbon HFCKW R123 has such a high dissolving effect that the R123 can be used as the sole fixing agent (without the addition of acetone).
  • FIG. 1 A basic illustration of an electrophotographic printing device is shown in FIG.
  • the heart of this device is an FT photo conductor drum.
  • a photoelectric layer is arranged on the surface of this photoconductor drum FT. This is first charged evenly with the help of a corotron KO.
  • the surface of the drum is partially illuminated. This can be done with the help of a character generator, which can consist of a laser LA, a deflection cell AB and a polygon mirror PO.
  • a character generator which has an arrangement of light-emitting diodes as the character-generating elements.
  • the image to be copied is imaged in a known manner on the photoconductor drum FT via appropriate optics.
  • the charge images generated by the character generator or the imaging optics for a copy on the surface of the photoconductor drum FT are developed in a developer station ES, i.e. they are colored with a developer mixture.
  • the developer station ES is constructed in a known manner, it can e.g. Magnetic brushes included.
  • the charge images which have developed toner images on the photoconductor drum FT then reach a transfer printing station US.
  • a corotron K01 is in turn arranged there. Due to the existing in the transfer station US electrostatic field, the toner images on a recording medium AT z. B. pulled over a paper web or single sheets. The toner images adhere to the surface of the recording medium AT in a smearable manner.
  • the fixing device FR can consist of a housing GH through which the record carrier AT is passed.
  • a solvent LM for example from one of the molecular formula C2HF3Cl2 designated connections
  • the steam required for fixing generates.
  • Such compounds are referred to as partially halogenated chlorofluorocarbons, which have the advantages described above.
  • the partially chlorinated fluorocarbon HFCKW R123 has been found to be particularly advantageous.
  • the solvent vapor generated in this way acts on the recording medium AT, in particular on the toner applied to the recording medium. It dissolves the toner particles so that they adhere permanently to the recording medium.
  • a toner based on polystyrene is used as the toner.
  • a toner with a non-crosslinked polymer matrix the basic polymer matrix of which consists of polystyrene and methacrylates, has proven to be favorable.
  • the partially chlorinated fluorocarbon HFCKW R123 has such a high dissolving effect that the R123 can be used as the sole fixing agent, which has the advantages described above.
  • Another partially halogenated fluorocarbon may also be used as the solvent, e.g. R141b with the formula CFCl2-CH3 (1,1-dichloro-1-fluoroethane). It is known as a foaming agent for foamed plastics.
  • the concentration of the fixing agent in the fixing chamber FR somewhat compared to the known fixing agent.
  • this can be achieved by mechanically shortening an ultrasonic measuring section serving as sensor S for the fixative concentration.
  • This mechanical shortening of the ultrasonic measuring section shortens the length base for the measurement, which results in an automatic increase in the fixing agent concentration while maintaining the other control variables of a known control arrangement RA for controlling the fixing agent concentration in the fixing device.
  • the known control arrangement RA controls a heating device HE which is connected to a voltage source SP and which is switched on and off with the aid of a switch SH.
  • the record carrier AT reaches further rollers RL1, RL2, via which the record carrier is transported to a recording stack ST2.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)

Abstract

Procédé de fixage d'un toner à base de polystyrène sur un support de reproduction (AT) d'un appareil d'impression ou de copie, selon lequel un solvant (LM) est vaporisé dans un dispositif de fixage (FR) et agit, dans cet état, sur le toner. On utilise comme solvants, des hydrocarbures fluorés partiellement halogénés, tels que le R183 et le R141b, qui ont la particularité de n'exercer qu'un faible effet nuisible sur l'environnement, et qui présentent vis-à-vis des toners à matrice polymère non réticulée avec matrice de base polymère en polystyrène et en métacrylates, un pouvoir dissolvant élevé.

Claims (2)

  1. Procédé de fixage d'un toner à base de polystyrène sur un support d'enregistrement (AT) d'un appareil d'impression ou de copie, un solvant (LM) étant évaporé dans un dispositif de fixage (FR) et agissant en cet état sur le toner,
    caractérisé en ce qu'il consiste à utiliser comme solvant (LM) unique un hydrocarbure fluorochloré, partiellement halogéné, ayant un point d'ébullition inférieur à 35°, choisi parmi CHCl₂-CF₃ et CFCl₂-CH₃ et à utiliser comme toner un toner ayant une matrice de polymère non réticulée, dont la matrice de base de polymère est en polystyrène et en méthacrylate.
  2. Solvant destiné au fixage d'un toner à base de polystyrène ayant une matrice de polymère non réticulée, dont la matrice de base de polymère est en polystyrène et en méthacrylate, sur un support d'enregistrement (AT) d'un appareil d'impression ou de copie, un solvant (LM) étant évaporé dans un dispositif de fixage (FR) et agissant en cet état sur le toner, caractérisé par un hydrocarbure fluorochloré, partiellement halogéné, ayant un point d'ébullition inférieur à 35°, choisi parmi CHCl₂-CF₃ et CFCl₂-CH₃.
EP92919887A 1991-11-21 1992-09-30 Procede et solvants pour le fixage d'un toner a base de polystyrene sur un support de reproduction d'un appareil d'impression ou de copie Expired - Lifetime EP0613572B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92919887A EP0613572B1 (fr) 1991-11-21 1992-09-30 Procede et solvants pour le fixage d'un toner a base de polystyrene sur un support de reproduction d'un appareil d'impression ou de copie

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP91119850 1991-11-21
EP91119850 1991-11-21
PCT/EP1992/002267 WO1993010485A1 (fr) 1991-11-21 1992-09-30 Procede et solvants pour le fixage d'un toner a base de polystyrene sur un support de reproduction d'un appareil d'impression ou de copie
EP92919887A EP0613572B1 (fr) 1991-11-21 1992-09-30 Procede et solvants pour le fixage d'un toner a base de polystyrene sur un support de reproduction d'un appareil d'impression ou de copie

Publications (2)

Publication Number Publication Date
EP0613572A1 EP0613572A1 (fr) 1994-09-07
EP0613572B1 true EP0613572B1 (fr) 1995-06-07

Family

ID=8207359

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92919887A Expired - Lifetime EP0613572B1 (fr) 1991-11-21 1992-09-30 Procede et solvants pour le fixage d'un toner a base de polystyrene sur un support de reproduction d'un appareil d'impression ou de copie

Country Status (3)

Country Link
EP (1) EP0613572B1 (fr)
DE (1) DE59202470D1 (fr)
WO (1) WO1993010485A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333042A (en) * 1992-12-14 1994-07-26 Interscience Computer Corporation Cold fusing agent
DE4425066A1 (de) 1994-07-15 1996-01-18 Solvay Fluor & Derivate Anwendungen und Zusammensetzungen mit Difluormethoxy-2,2,2-trifluorethan
US5834150A (en) * 1995-08-11 1998-11-10 Interscience Computer Corporation Solvent vapor fixing methods and process color toners for use in same
BE1009964A3 (fr) * 1996-01-15 1997-11-04 Solvay Procede de fixage d'un toner dans un appareil d'impression ou de reproduction de documents et compositions utilisables dans ce procede.
DE19914514B4 (de) * 1999-03-30 2007-10-18 OCé PRINTING SYSTEMS GMBH Einrichtung und Verfahren zum Drucken oder Kopieren, wobei das Tonerbild einem Lösungsmittel in Gasphase ausgesetzt wird
DE10037464A1 (de) 2000-08-01 2002-03-07 Oce Printing Systems Gmbh Vorrichtung und Verfahren zum Fixieren eines Tonerbildes unter Verwendung eines gerichteten Stroms aus Lösemitteldampf

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2835284C2 (de) * 1978-08-11 1981-09-24 Siemens AG, 1000 Berlin und 8000 München In der Fixiervorrichtung eines Druck- oder Kopiergerätes verwendetes Lösungsmittel
EP0465037A1 (fr) * 1990-06-29 1992-01-08 Minnesota Mining And Manufacturing Company Composition de solvant

Also Published As

Publication number Publication date
WO1993010485A1 (fr) 1993-05-27
DE59202470D1 (de) 1995-07-13
EP0613572A1 (fr) 1994-09-07

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