WO1993010485A1 - Method and solvent for fixing a polystyrene-based toner on a reproduction medium in a printing or copying machine - Google Patents
Method and solvent for fixing a polystyrene-based toner on a reproduction medium in a printing or copying machine Download PDFInfo
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- WO1993010485A1 WO1993010485A1 PCT/EP1992/002267 EP9202267W WO9310485A1 WO 1993010485 A1 WO1993010485 A1 WO 1993010485A1 EP 9202267 W EP9202267 W EP 9202267W WO 9310485 A1 WO9310485 A1 WO 9310485A1
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- Prior art keywords
- solvent
- fixing
- toner
- polystyrene
- printing
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- 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 toner is dissolved in the vapor of a suitable solvent and intimate contact is achieved between the toner and the recording medium.
- An azeotropic mixture of trichlorotrifluoroethane (C 2 C1, F,) and acetone (C, HgO) is used as the solvent.
- the primary solvent here is acetone, while trichlorotrifluoroethane serves as a flame retardant.
- Trichlorotrifluoroethane (CFC R133) has a high ozone potential of 80% and a high greenhouse effect of 135%, which leads to environmental pollution if released.
- the object of the invention is therefore to provide a method for fixing a polystyrene-based toner to 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, also a constant, constant fixing quality differently constructed recording media guaranteed.
- Substances with the empirical formula C 2 HF. j Cl 2 are referred to as partially halogenated chlorofluorocarbons or hydrofluoroalkals. They are particularly environmentally friendly. From these compounds of the 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, the polymer matrix of which consists of polystyrene and metaacrylates, 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).
- R123 as a fixing agent has the advantage, in addition to the low environmental impact, that it can be used in its pure form, so that a proportion of the mixture, like the known fixing agents, cannot become leaner during pressing. Since the fixing agent according to the invention consists of pure R123, underfixing can no longer occur. For this reason, different types of paper can be used as recording media. Furthermore, the fixative has a low dependence on air humidity In contrast to acetone, which is readily water-soluble, which is why regulation of the air humidity in the fixing device can be dispensed with, or the air moisture absorbed by the recording medium in the most varied amounts does not have a negative effect on the fixing process.
- the use of the fixing agent according to the invention enables a larger fixing window with regard to under- and over-fixing, ie a constant, constant fixing quality in the most varied of operating conditions without additional high control effort.
- FIG. 1 shows a basic illustration of an electrophotographic printing device.
- the heart of this device is a FT photoconductor drum.
- a photoelectric layer is arranged on the surface of this photoconductor drum FT. This is initially evenly charged with the help of a corotron KO.
- the surface of the drum is partially illuminated. This can be done with the aid 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 light emanating from the laser LA is split into partial beams in the deflection cell AB, for example an acousto-optical deflection cell, according to the characters to be printed, which are directed by the polygon mirror PO onto the surface of the photoconductor drum FT.
- the surface of the drum is partially discharged in accordance with the partial beams directed onto the photoconductor drum. If the electrophotographic printing device shown is used as a copying device, 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 KOI 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. a paper web or single sheets pulled over. The toner images stick to the surface of the AT recording medium.
- the record carrier AT can be removed from a stack ST1 and fed to the transfer station US via feed beads VR.
- a roller RL is arranged behind the transfer station US, through which the recording medium is deflected and guided to a fixing device FR.
- the fixing device FR can consist of a housing GH through which the record carrier AT is passed.
- a solvent LM is formed, for example from one of the molecular formula C 2 HF, C1 2 designated connections, which generates the necessary steam for fixation.
- 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 produced 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. It has turned out to be favorable to have a toner with a non-crosslinked polymer matrix, the polymer matrix of which consists of polystyrene and metaacrylates. Compared to toner with a non-crosslinked polymer matrix whose polymer matrix consists of polystyrene and metaacrylates, 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.
- Solvents with the empirical formula C 2 HF, C1 2 are partially halogenated chlorofluorocarbons. These partially halogenated chlorofluorocarbons are generally suitable as solvents for fixing devices in electrophotographic printing devices. Since - as described - a fixing steam is generated from the solvent, for example by evaporation on a baffle plate or heating plate, it is advantageous if the solvent has a low boiling point, so that, for example, no negative heat influences are exerted on the toner and the paper and the evaporation energy to be supplied is not too high. A boiling point of less than 35 * has proven to be favorable.
- Another partially halogenated fluorocarbon can also be used as the solvent, for example R141b with the formula CFC1 2 -CH 3 (1,1-dichloro-l-fluoroethane). It is known as a foaming agent for foamed plastics.
- the concentration of the fixing agent in the fixing chamber FR may be advantageous to raise 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 regulating 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.
- cold traps with seals DI are arranged at the entry and exit points of the award carrier.
- the recording medium AT arrives at further rollers RL1, RL2, via which the recording medium is transported to a recording stack ST2.
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- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
Abstract
Description
Verfahren und Lösungsmittel zum Fixieren eines auf Poly¬ styrolbasis aufgebauten Toners auf einem Aufzeichnungs¬ träger eines Druck-oder KopiergerätesMethod and solvent for fixing a toner based on polystyrene on a recording medium of a printing or copying machine
Die Erfindung betrifft ein Verfahren und ein Lösungsmittel zum Fixieren eines auf Polystyrolbasis aufgebauten Toners auf einem Aufzeichnungsträger eines Druck- oder Kopierge¬ rätes, wobei in einer Fixiervorrichtung das Lösungsmittel verdampft wird und in diesem Zustand auf den Toner ein- wirkt.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.
Ein derartiges Verfahren ist z.B. aus der US-PS 4 311 723 bekannt.Such a method is e.g. known from U.S. Patent 4,311,723.
Eei diesem als Kaltfixierung bezeichneten Verfahren wird der Toner im Dampf eines geeigneten Lösungsmittels ange¬ löst und dabei ein inniger Kontakt zwischen Toner und Auf¬ zeichnungsträger erreicht. Als Lösungsmittel wird dabei ein azeotropes Gemisch aus Trichlortrifluorethan (C2C1,F,) und Aceton (C,HgO) verwendet. Das primäre Lösungsmittel ist hierbei das Aceton, während das Trichlortrifluorethan als Flammschutzmittel dient. Das Trichlortrifluorethan (FCKW R133) besitzt ein hohes Ozonpotential von 80 % und einen hohen Treibhauseffekt von 135 %, was bei Freisetzung zur Umweltbelastung führt.In this process, known as cold fixation, the toner is dissolved in the vapor of a suitable solvent and intimate contact is achieved between the toner and the recording medium. An azeotropic mixture of trichlorotrifluoroethane (C 2 C1, F,) and acetone (C, HgO) is used as the solvent. The primary solvent here is acetone, while trichlorotrifluoroethane serves as a flame retardant. Trichlorotrifluoroethane (CFC R133) has a high ozone potential of 80% and a high greenhouse effect of 135%, which leads to environmental pollution if released.
Weiterhin hat sich herausgestellt, daß das bekannte Lö¬ sungsmittel bei der Anwendung als Fixiermittel in Druck¬ oder Kopiergeräten zu einem verschlechterten Fixierergeb- nis in Form einer Unterfixierung führen kann. Bei bestimm¬ ten Druckprogrammen mit relativ hohem Einfärbungsgrad des Aufzeichnungsträgers und insbesondere bei einigen Papier¬ sorten tritt eine Abmagerung des Acetonteils im Fixier¬ mittels während des Drückens auf. Das azeotrope Verhalten des Gemisches ist damit nicht mehr gewährleistet. Aufgabe der Erfindung ist es deshalb, ein Verfahren zum Fixieren eines auf Polystyrolbasis aufgebauten Toners auf einen Aufzeichnungsträger eines Druck- oder Kopiergerätes bereitzustellen, das eine minimale Umweltbelastung bezüg- lieh Ozonabbaupotential und Treibhauseffekt verursacht und auf der anderen Seite eine gleichbleibend konstante Fi¬ xierqualität auch bei unterschiedlichst aufgebauten Auf¬ zeichnungsträgern gewährleistet.Furthermore, it has been found that the known solvent, when used as a fixing agent in printing or copying machines, can lead to a worsened fixing result in the form of an underfixing. In certain printing programs with a relatively high degree of inking of the recording medium, and in particular in the case of some types of paper, the acetone part in the fixing agent becomes leaner during printing. The azeotropic behavior of the mixture is no longer guaranteed. The object of the invention is therefore to provide a method for fixing a polystyrene-based toner to 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, also a constant, constant fixing quality differently constructed recording media guaranteed.
Diese Aufgabe wird mit einem Verfahren gemäß den Merkmalen des Patentanspruches 1 gelöst.This object is achieved with a method according to the features of claim 1.
Vorteilhafte Ausführungsformen der Erfindung sind in den Unteransprüchen gekennzeichnet.Advantageous embodiments of the invention are characterized in the subclaims.
Stoffe mit der Summenformel C2HF.jCl2 werden als teilha¬ logenierte Fluorchlorkohlenwasserstoffe oder Hydrofluoral- kale bezeichnet. Sie sind besonders umweltfreundlich. Als besonders günstig hat sich aus diesen Verbindungen der teilhalogenierten Fluorchlorkohlenwasserstoffe die Verwen¬ dung von teilchloriertem Fluorkohlenwasserstoff R123 und von R141b herausgestellt. Der teilchlorierte Fluorkohlen¬ wasserstoff HFCKW R123 besitzt gegenüber Tonern mit nicht- vernetzter Polymermatrix, dessen Polymergrundmatrix aus Polystyrol und Metaacrylaten besteht, eine so hohe Lö¬ sungswirkung, daß das R123 als alleiniges Fixiermittel (ohne Acetonzusatz) eingesetzt werden kann. Die Verwendung von R123 als Fixiermittel hat neben der geringen Umweltbe¬ lastung den Vorteil, daß es rein verwendet werden kann, so daß eine Abmagerung eines Gemischanteiles, wie bei den be¬ kannten Fixiermitteln, während des Drückens nicht auftre¬ ten kann. Da das erfindungsgemäße Fixiermittel aus reinem R123 besteht, kann eine Unterfixierung nicht mehr auftre¬ ten. Aus diesem Grund können als Aufzeichnungsträger ver- schiedenste Papiersorten eingesetzt werden. Weiterhin hat das Fixiermittel eine geringe Luftfeuchteabhängigkeit im Gegensatz zu Aceton, welches gut wasserlöslich ist, weswe¬ gen auf eine Regelung der Luftfeuchte in der Fixiervor¬ richtung verzichtet werden kann, bzw. die von dem Auf¬ zeichnungsträger in unterschiedlichster Menge aufgenommene Luftfeuchte sich nicht negativ auf den Fixierprozeß aus¬ wirkt. Die Verwendung des erfindungsgemäßen Fixiermittels ermöglicht ein größeres Fixierfenster bezüglich Unter- und Überfixierung, d.h. eine gleichbleibend konstante Fixier¬ qualität bei unterschiedlichsten Betriebsbedingungen ohne zusätzlichen hohen Regelungsaufwand.Substances with the empirical formula C 2 HF. j Cl 2 are referred to as partially halogenated chlorofluorocarbons or hydrofluoroalkals. They are particularly environmentally friendly. From these compounds of the 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, the polymer matrix of which consists of polystyrene and metaacrylates, 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). The use of R123 as a fixing agent has the advantage, in addition to the low environmental impact, that it can be used in its pure form, so that a proportion of the mixture, like the known fixing agents, cannot become leaner during pressing. Since the fixing agent according to the invention consists of pure R123, underfixing can no longer occur. For this reason, different types of paper can be used as recording media. Furthermore, the fixative has a low dependence on air humidity In contrast to acetone, which is readily water-soluble, which is why regulation of the air humidity in the fixing device can be dispensed with, or the air moisture absorbed by the recording medium in the most varied amounts does not have a negative effect on the fixing process. The use of the fixing agent according to the invention enables a larger fixing window with regard to under- and over-fixing, ie a constant, constant fixing quality in the most varied of operating conditions without additional high control effort.
Anhand eines Ausführungsbeispiels, das in der Figur darge¬ stellt ist, wird die Erfindung weiter erläutert:The invention is further explained on the basis of an exemplary embodiment which is shown in the figure:
In der Figur 1 ist eine Prinzipdarstellung eines elektro- fotografischen Druckgerätes gezeigt. Kernpunkt dieses Ge¬ rätes ist eine Fotoleitertrommel FT. Auf der Oberfläche dieser Fotoleitertrommel FT ist eine fotoelektrische Schicht angeordnet. Diese wird zunächst mit Hilfe eines Korotrons KO gleichmäßig aufgeladen. Um die Ladungsbilder der zu druckenden Zeichen auf der Fotoleitertrommel zu erzeugen, wird die Oberfläche der Trommel partiell be¬ leuchtet. Dies kann mit Hilfe eines Zeichengenerators er¬ folgen, der aus einem Laser LA, einer Ablenkzelle AB und einem Polygonspiegel PO bestehen kann. Es ist jedoch auch möglich einen Zeichengenerator zu verwenden, der als zei¬ chenerzeugende Elemente eine Anordnung von Leuchtdioden aufweist. Das vom Laser LA ausgehende Licht wird in der Ablenkzelle AB, z.B. einer akustooptischen Ablenkzelle, entsprechend der zu druckenden Zeichen in Teilstrahlen aufgespaltet, die durch den Polygonspiegel PO auf die Oberfläche der Fotoleitertrommel FT gelenkt werden. Ent¬ sprechend den auf die Fotoleitertrommel gelenkten Teil¬ strahlen wird die Oberfläche der Trommel teilweise entla- den. Wird das dargestellte elektrofotografische Druckgerät als Kopiergerät verwendet, erfolgt in bekannter Weise eine Ab¬ bildung der zu kopierenden Auflage über eine entsprechende Optik auf die Fotoleitertrommel FT.FIG. 1 shows a basic illustration of an electrophotographic printing device. The heart of this device is a FT photoconductor drum. A photoelectric layer is arranged on the surface of this photoconductor drum FT. This is initially evenly charged with the help of a corotron KO. In order to generate the charge images of the characters to be printed on the photoconductor drum, the surface of the drum is partially illuminated. This can be done with the aid of a character generator, which can consist of a laser LA, a deflection cell AB and a polygon mirror PO. However, it is also possible to use a character generator which has an arrangement of light-emitting diodes as the character-generating elements. The light emanating from the laser LA is split into partial beams in the deflection cell AB, for example an acousto-optical deflection cell, according to the characters to be printed, which are directed by the polygon mirror PO onto the surface of the photoconductor drum FT. The surface of the drum is partially discharged in accordance with the partial beams directed onto the photoconductor drum. If the electrophotographic printing device shown is used as a copying device, the image to be copied is imaged in a known manner on the photoconductor drum FT via appropriate optics.
Die von dem Zeichengenerator bzw. der Abbildungsoptik für eine Kopiervorlage auf der Oberfläche der Fotoleitertrom¬ mel FT erzeugten Ladungsbilder werden in einer Entwickler¬ station ES entwickelt, d.h. sie werden mit Entwicklerge- misch eingefärbt. Als Entwicklergemisch wird eine Mischung aus Tonerteilchen und ferromagnetischen Trägerteilchen, sog. Zweikomponentenentwickler oder auch ein Einkomponen¬ tenentwickler verwendet. Die Entwicklerstation ES ist in bekannter Weise aufgebaut, sie kann z.B. Magnetbürsten enthalten.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. A mixture of toner particles and ferromagnetic carrier particles, so-called two-component developers or also a one-component developer, is used as the developer mixture. The developer station ES is constructed in a known manner, it can e.g. Magnetic brushes included.
Die entwickelten Tonerbilder aufweisenden Ladungsbilder auf der Fotoleitertrommel FT gelangen anschließend in eine Umdruckstation US. Dort ist wiederum ein Korotron KOI an- geordnet. Durch das in der Umdruckstation US bestehende elektrostatische Feld werden die Tonerbilder auf einen Aufzeichnungsträger AT z. B. eine Papierbahn oder Einzel¬ blätter herübergezogen. Die Tonerbilder haften verwischbar auf der Oberfläche des AufZeichnungsträgers AT.The charge images which have developed toner images on the photoconductor drum FT then reach a transfer printing station US. A corotron KOI 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. a paper web or single sheets pulled over. The toner images stick to the surface of the AT recording medium.
Der Aufzeichnungsträger AT kann aus einem Stapel ST1 ent¬ nommen werden und über Vorschubraupen VR der Umdrucksta¬ tion US zugeführt werden. Hinter der Umdruckstation US ist eine Rolle RL angeordnet, durch die der Aufzeichnungsträ- ger umgelenkt und zu einer Fixiervorrichtung FR geführt wird.The record carrier AT can be removed from a stack ST1 and fed to the transfer station US via feed beads VR. A roller RL is arranged behind the transfer station US, through which the recording medium is deflected and guided to a fixing device FR.
Die Fixiervorrichtung FR kann aus einem Gehäuse GH be¬ stehen, durch das der Aufzeichnungsträger AT hindurchge- führt ist. In dem Gehäuse GH wird aus einem Lösungsmittel LM, das z.B. aus einer der durch die Summenformel C2HF,C12 bezeichneten Verbindungen besteht, der zum Fixieren erfor¬ derliche Dampf erzeugt. Derartige Verbindungen werden als teilhalogenierte Fluorchlorkohlenwasserstoffe bezeichnet, diese haben die eingangs beschriebenen Vorteile. Aus der Gruppe der Verbindungen mit der Summenformel C2HF,C12 hat sich als besonders vorteilhaft der teilchlorierte Fluor¬ kohlenwasserstoff HFCKW R123 herausgestellt. Der dadurch erzeugte Lösungsmitteldampf wirkt auf den Aufzeichnungs¬ träger AT ein, insbesondere auf den, auf dem Aufzeich- nungstrager aufgebrachten Toner. Er löst die Tonerteilchen an, so daß diese auf dem Aufzeichnungsträger dauerhaft haften. Verwendet wird als Toner ein auf Polystyrolbasis aufgebauter Toner. Dabei hat sich als günstig herausge¬ stellt, einen Toner mit nichtvernetzter Polymermatrix, dessen Polymergrundmatrix aus Polystyrol und Metaacrylaten besteht, herausgestellt. Der teilchlorierte Fluorkohlen¬ wasserstoff HFCKW R123 besitzt gegenüber Toner mit nicht¬ vernetzter Polymermatrix dessen Polymergrundmatrix aus Polystyrol und Metaacrylaten besteht, eine so hohe Lö- sungswirkung, daß das R123 als alleiniges Fixiermittel eingesetzt werden kann, was die eingangs beschriebenen Vorteile hat.The fixing device FR can consist of a housing GH through which the record carrier AT is passed. In the housing GH, a solvent LM is formed, for example from one of the molecular formula C 2 HF, C1 2 designated connections, which generates the necessary steam for fixation. Such compounds are referred to as partially halogenated chlorofluorocarbons, which have the advantages described above. From the group of compounds with the empirical formula C 2 HF, C1 2 , the partially chlorinated fluorocarbon HFCKW R123 has been found to be particularly advantageous. The solvent vapor produced 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. It has turned out to be favorable to have a toner with a non-crosslinked polymer matrix, the polymer matrix of which consists of polystyrene and metaacrylates. Compared to toner with a non-crosslinked polymer matrix whose polymer matrix consists of polystyrene and metaacrylates, 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.
Lösungsmittel mit der Summenformel C2HF,C12 sind teilhalo- genierte Fluorchlorkohlenwasserstoffe. Diese teilhaloge- nierten Fluorchlorkohlenwasserstoffe sind insgesamt als Lösungsmittel für Fixiereinrichtungen in elektrofotogra- fischen Druckeinrichtungen geeignet. Da - wie beschrie¬ ben - aus dem Lösungsmittel ein Fixierdampf erzeugt wird, z.B. durch Verdampfen auf einer Prall- oder Heizplatte, ist es günstig, wenn das Lösungsmittel einen niedrigen Siedepunkt hat, damit z.B. keine negativen Wärmeeinflüsse auf den Toner und das Papier ausgeübt werden und die zu¬ zuführende Verdampfungsenergie nicht zu hoch ist. Als günstig hat sich dabei ein Siedepunkt von unter 35* her¬ ausgestellt. Als Lösungsmittel kann auch ein anderer teilhalogenierter Fluorkohlenwasserstoff verwendet werden, z.B. R141b mit der Formel CFC12-CH3 (1,1-Dichlor-l-fluorethan). Es ist als Treibmittel für Schaumkunststoffe bekannt.Solvents with the empirical formula C 2 HF, C1 2 are partially halogenated chlorofluorocarbons. These partially halogenated chlorofluorocarbons are generally suitable as solvents for fixing devices in electrophotographic printing devices. Since - as described - a fixing steam is generated from the solvent, for example by evaporation on a baffle plate or heating plate, it is advantageous if the solvent has a low boiling point, so that, for example, no negative heat influences are exerted on the toner and the paper and the evaporation energy to be supplied is not too high. A boiling point of less than 35 * has proven to be favorable. Another partially halogenated fluorocarbon can also be used as the solvent, for example R141b with the formula CFC1 2 -CH 3 (1,1-dichloro-l-fluoroethane). It is known as a foaming agent for foamed plastics.
Um eine ausreichende Fixierqualität des Toners auf dem Be- druckstoff, d.h. dem Aufzeichnungsträger AT zu erreichen, kann es günstig sein, die Fixiermittelkonzentration in der Fixierkammer FR gegenüber dem bekannten Fixiermittel etwas anzuheben. Dies kann gerätetechnisch durch eine mechani¬ sche Verkürzung einer als Sensor S für die Fixiermittel¬ konzentration dienenden Ultraschallmeßstrecke erreicht werden. Durch diese mechanische Verkürzung der Ultra¬ schallmeßstrecke wird die Längenbasis für die Messung ver- kürzt, woraus eine automatische Erhöhung der Fixiermittel¬ konzentration bei einer Beibehaltung der sonstigen Rege¬ lungsgrößen einer bekannten Regelungsanordnung RA zur Re¬ gelung der Fixiermittelkonzentration in der Fixiervor¬ richtung resultiert. Die bekannte Regelungsanordnung RA regelt eine Heizeinrichtung HE, die mit einer Spannungs¬ quelle SP verbunden ist und die mit Hilfe eines Schalters SH ein- bzw. ausgeschaltet wird.In order to ensure that the toner is adequately fixed on the printing material, i.e. To reach the record carrier AT, it may be advantageous to raise the concentration of the fixing agent in the fixing chamber FR somewhat compared to the known fixing agent. In terms of device technology, 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 regulating 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.
Um ein Austreten von Lösungsmitteldampf aus dem Gehäuse GH zu verhindern, sind an der Zutritts- bzw. Austrittsstelle des Auszeichnungsträgers Kältefallen mit Dichtungen DI an¬ geordnet.In order to prevent solvent vapor from escaping from the housing GH, cold traps with seals DI are arranged at the entry and exit points of the award carrier.
Von der Fixiervorrichtung FR gelangt der Aufzeichnungs- träger AT zu weiteren Rollen RL1, RL2, über die der Auf¬ zeichnungsträger zu einem Aufnahmestapel ST2 transportiert wird. From the fixing device FR, the recording medium AT arrives at further rollers RL1, RL2, via which the recording medium is transported to a recording stack ST2.
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE59202470T DE59202470D1 (en) | 1991-11-21 | 1992-09-30 | METHOD AND SOLVENT FOR FIXING A POLYSTYRENE-BASED TONER ON A RECORDING CARRIER OF A PRINT OR COPIER. |
| EP92919887A EP0613572B1 (en) | 1991-11-21 | 1992-09-30 | Method and solvent for fixing a polystyrene-based toner on a reproduction medium in a printing or copying machine |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP91119850.5 | 1991-11-21 | ||
| EP91119850 | 1991-11-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1993010485A1 true WO1993010485A1 (en) | 1993-05-27 |
Family
ID=8207359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1992/002267 Ceased WO1993010485A1 (en) | 1991-11-21 | 1992-09-30 | Method and solvent for fixing a polystyrene-based toner on a reproduction medium in a printing or copying machine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0613572B1 (en) |
| DE (1) | DE59202470D1 (en) |
| WO (1) | WO1993010485A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0605128A1 (en) * | 1992-12-14 | 1994-07-06 | Interscience Computer Corporation | Fusing agent |
| EP0700988A2 (en) | 1994-07-15 | 1996-03-13 | Solvay Fluor und Derivate GmbH | Composition containing difluoromethoxy-2,2,2-trifluoroethane and use thereof |
| WO1997007432A1 (en) * | 1995-08-11 | 1997-02-27 | Interscience Computer Corporation | Solvent vapor fixing methods and process color toners for use in same |
| EP0784238A1 (en) | 1996-01-15 | 1997-07-16 | SOLVAY (Société Anonyme) | Fixing of toner by gaseous hydrofluorocarbon compositions and said compositions |
| DE19914514A1 (en) * | 1999-03-30 | 2000-11-02 | Oce Printing Systems Gmbh | Electrographic printer or copier useful for single, multicolor and duplex printing, e.g. of book or brochure, exposes image on toner carrier to solvent vapor before transfer to copy carrier |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10037464A1 (en) | 2000-08-01 | 2002-03-07 | Oce Printing Systems Gmbh | Apparatus and method for fixing a toner image using a directional stream of solvent vapor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2029325A (en) * | 1978-08-11 | 1980-03-19 | Siemens Ag | Method of operating a non-mechanical printer or copier |
| EP0465037A1 (en) * | 1990-06-29 | 1992-01-08 | Minnesota Mining And Manufacturing Company | Solvent composition |
-
1992
- 1992-09-30 WO PCT/EP1992/002267 patent/WO1993010485A1/en not_active Ceased
- 1992-09-30 EP EP92919887A patent/EP0613572B1/en not_active Expired - Lifetime
- 1992-09-30 DE DE59202470T patent/DE59202470D1/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2029325A (en) * | 1978-08-11 | 1980-03-19 | Siemens Ag | Method of operating a non-mechanical printer or copier |
| EP0465037A1 (en) * | 1990-06-29 | 1992-01-08 | Minnesota Mining And Manufacturing Company | Solvent composition |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0605128A1 (en) * | 1992-12-14 | 1994-07-06 | Interscience Computer Corporation | Fusing agent |
| EP0700988A2 (en) | 1994-07-15 | 1996-03-13 | Solvay Fluor und Derivate GmbH | Composition containing difluoromethoxy-2,2,2-trifluoroethane and use thereof |
| US5674825A (en) * | 1994-07-15 | 1997-10-07 | Solvay Fluor Und Derivate Gmbh | Difluoromethoxy-2,2,2-trifluoroethane compositions and methods of use |
| US5888688A (en) * | 1994-07-15 | 1999-03-30 | Solvay Fluor Und Derivate Gmbh | Difluoromethoxy-2, 2, 2-trifluoroethane compositions and methods of use |
| WO1997007432A1 (en) * | 1995-08-11 | 1997-02-27 | Interscience Computer Corporation | Solvent vapor fixing methods and process color toners for use in same |
| GB2318421A (en) * | 1995-08-11 | 1998-04-22 | Interscience Computer Corp | Solvent vapor fixing methods and process color toners for use in same |
| EP0784238A1 (en) | 1996-01-15 | 1997-07-16 | SOLVAY (Société Anonyme) | Fixing of toner by gaseous hydrofluorocarbon compositions and said compositions |
| BE1009964A3 (en) * | 1996-01-15 | 1997-11-04 | Solvay | Method for fixing a toner unit in print or reproduction of documents and composition for use in the method. |
| US5714298A (en) * | 1996-01-15 | 1998-02-03 | Solvay (Societe Anonyme) | Method for fixing a toner in a copier and compositions used in this method |
| DE19914514A1 (en) * | 1999-03-30 | 2000-11-02 | Oce Printing Systems Gmbh | Electrographic printer or copier useful for single, multicolor and duplex printing, e.g. of book or brochure, exposes image on toner carrier to solvent vapor before transfer to copy carrier |
| DE19914514B4 (en) * | 1999-03-30 | 2007-10-18 | OCé PRINTING SYSTEMS GMBH | Apparatus and method for printing or copying wherein the toner image is exposed to a solvent in gaseous phase |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0613572A1 (en) | 1994-09-07 |
| EP0613572B1 (en) | 1995-06-07 |
| DE59202470D1 (en) | 1995-07-13 |
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