EP1217467A2 - Verfahren zum doppelseitigen Bedrucken und/oder Beschichten eines Substrats - Google Patents
Verfahren zum doppelseitigen Bedrucken und/oder Beschichten eines Substrats Download PDFInfo
- Publication number
- EP1217467A2 EP1217467A2 EP01127118A EP01127118A EP1217467A2 EP 1217467 A2 EP1217467 A2 EP 1217467A2 EP 01127118 A EP01127118 A EP 01127118A EP 01127118 A EP01127118 A EP 01127118A EP 1217467 A2 EP1217467 A2 EP 1217467A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- toner
- substrate
- image
- coating
- glass transition
- 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
Links
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- 238000007639 printing Methods 0.000 title claims description 52
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- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 229920000642 polymer Polymers 0.000 claims abstract description 15
- 230000009477 glass transition Effects 0.000 claims description 36
- 238000004132 cross linking Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 13
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- 239000003086 colorant Substances 0.000 claims description 8
- 230000005855 radiation Effects 0.000 claims description 6
- 239000011111 cardboard Substances 0.000 claims description 3
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Images
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
- G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
- G03G15/23—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 specially adapted for copying both sides of an original or for copying on both sides of a recording or image-receiving material
- G03G15/231—Arrangements for copying on both sides of a recording or image-receiving material
- G03G15/238—Arrangements for copying on both sides of a recording or image-receiving material using more than one reusable electrographic recording member, e.g. single pass duplex copiers
-
- 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
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2007—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using radiant heat, e.g. infrared lamps, microwave heaters
-
- 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
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2039—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat with means for controlling the fixing temperature
-
- 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
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2098—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using light, e.g. UV photohardening
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00016—Special arrangement of entire apparatus
- G03G2215/00021—Plural substantially independent image forming units in cooperation, e.g. for duplex, colour or high-speed simplex
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/20—Details of the fixing device or porcess
- G03G2215/207—Type of toner image to be fixed
- G03G2215/2083—Type of toner image to be fixed duplex
Definitions
- the invention relates to a method for double-sided printing and / or coating a substrate, in particular paper or cardboard, using at least one Toner, according to claim 1.
- a known method is electrostatic printing, in which a latent electrostatic Image is developed by charged toner particles. These are placed on an image receiving substrate, hereinafter referred to as substrate. The following is developed and fixed image transferred to the substrate by heating the toner particles and be melted.
- To melt the toner particles are often touching Process used in which the toner particles in contact with the corresponding Facilities, such as hot rolls or rollers, are brought. adversely is that the use of silicone oil as a release agent is usually required prevent the melted toner from adhering to the heating device.
- Farther are the construction, maintenance and operating costs of these touching working Heating devices are complex and therefore expensive. Furthermore, the touching Heaters caused relatively high failure rates.
- To fix the example toner transferred on paper are also non-contact heating devices and methods are known in which, for example, with the aid of heat / microwave radiation or the toner particles are melted with hot air.
- the contacting and the non-contacting melting processes use, for example, toners whose glass transition temperature (T G ) is in a range from 45 ° C. to 75 ° C.
- T G glass transition temperature
- the glass transition temperature at which the toner begins to soften, starting from the solid state, can be influenced by the choice of raw materials and by the addition of certain additives to the toner.
- the lower value of the temperature range within which the glass transition point lies is limited at the bottom by the storage conditions of the toner and the heat generated in the printer, in particular within the development station, and at the top by the melting and fixing conditions. Both the toner and the substrate itself are heated in a melting device for the toner.
- the surface temperature of the substrate must be in the range of the glass transition temperature of the toner or above.
- the toner already reaches or exceeds the glass transition temperature (T G ) in the region of the melting device.
- Methods and devices are known in which the substrate is printed on both sides or is coated, often for printing on the top and bottom and the same toner transfer device and fuser are used. After a first side of the substrate is printed, the substrate becomes automatic turned, returned to the beginning of the processing line and again the transmission device and fed to the reflow unit where the other side of the Substrate is printed.
- Toners become the substrate, the image already fixed on the back of the substrate and the image to be fixed is heated.
- the second heating affects in unwanted Way the print quality, especially the gloss of the one on the first page, already fixed image. Repeated heating of the substrate can cause the Shine in individual areas or change over the entire substrate side.
- the gloss value of the second side of the substrate is larger than on the first substrate side.
- the one tends to the first Toner already fixed on the substrate side when the second substrate side is heated onto a Temperature that is above the glass transition point of the toner for smearing.
- the re-melting of the already fixed one located on the first side of the substrate Toners lead to errors in the printed image and to contamination of that Transport device guiding substrate along the processing line through the smeared Toner. In the worst case, the substrate on the transport device stick.
- the same problems also occur with a device in which two complete Printing units, each having a toner transfer device and a fusing device exhibit. In these known devices, a first image of a first printing unit transferred to a first side of the substrate and fixed while subsequent a second image on the back of the substrate by means of the second printing unit is transferred and fixed.
- a method with the features of claim 1 is proposed. This provides that for double-sided printing and / or coating of a substrate, for example a paper sheet or a paper web, using at least one liquid or dry toner having at least one polymer, at least one toner layer or a first image having at least one toner layer on an image first side of the substrate is transferred. This toner is then heated to its glass transition temperature (T G ) or above. The toner or the toner layers are preferably melted to the extent that a certain gloss is obtained. This state of the toner is then frozen by fixing the toner on the substrate, for example with the aid of ultraviolet rays.
- T G glass transition temperature
- the toner in the form of individual molecules has the property that its original glass transition temperature shifts to a higher temperature level as a result of the crosslinking of its polymer chains and the viscosity of the toner increases.
- its glass transition temperature rises, so that when it is heated again, this toner only softens at a higher temperature, starting from the solid state.
- the crosslinking process increases the glass transition temperature and the viscosity of the toner, the toner no longer becoming liquid when it is heated again above its new glass transition point, but instead acquires a thermoplastic, rubber-like structure.
- At least one toner layer or a second image having at least one toner layer is transferred to the other, second substrate side in a next step.
- the toner on the second substrate side is then heated or heated to a temperature which is equal to or greater than its own glass transition temperature. Subsequently, the molecules of the second toner also crosslink here, which lead to the changes in properties of the toner described above.
- the toner already fixed on the first substrate side can no longer become liquid, as said, but remains highly viscous when heated above its new glass point, it can be ensured that the toner applied and fixed on the first substrate side is fixed by fixing the toner the other, second substrate side is not smeared on its base, for example a conveyor belt or a roller, and / or undergoes a change in gloss.
- the temperature of the first side of the substrate and the toner fixed thereon, which are heated when the second Set substrate side to fix the second toner image, also over the new glass transition point of the first toner image may be as long as the first toner image is thereby is not affected. Because the one on the first substrate side Toner can no longer become liquid when it is heated up again, so it can smear and thus contamination of the printing and / or coating machine and / or the Copier, in which the method according to the invention is used, by the on the toner applied and fixed on the first substrate side can be avoided. It is advantageous furthermore, that the quality, in particular the gloss, of the applied to the first substrate side Image or the coating remains the same and when printing or coating of the second side of the substrate is not changed.
- the glass transition temperature of the toner rises due to the crosslinking of the polymer chains by 10 ° C to 20 ° C and at the same time increases Viscosity of the toner. Above the glass transition point, the toner will Heating is no longer liquid, but - as I said - gets a thermoplastic, rubber-like Structure.
- Additives for controlling the melt flow, surface quality, the toner charge, the powder flow and optionally other additives are admixed to the toner.
- the raw material of this toner is mixed together and melt-kneaded, for example, in a heated two-roll mill.
- the cooled extrudate is ground to a particle size of ⁇ 3 mm and then placed in a jet mill, which further crushes it.
- the fine toner particles are sorted, particles with an average particle size of approximately 8 ⁇ m being preferably used for the toner used in the method according to the invention.
- the melting of the toner for the purpose of fixing it on its substrate takes place at a surface temperature of approximately 70 ° C to 120 ° C, at which the curing of the toner as a result of the crosslinking of the polymer chains is carried out while irradiating the melted toner with ultraviolet light.
- the crosslinking of the polymer chains increases the glass transition temperature of the toner by more than 10 ° C and also its viscosity.
- the feasible melting and fixing processes the publication "UV-cured toners for printing and coating on paper-like substrates" by Detlef Schulze-Hagenest and Paul HG Binda, IS&T 13 th Int. Congr. Adv. I. Non-Impact-Printing Technologies, 1997, whose content is the subject of this application.
- the substrate is paper, cardboard or the like
- its first side can be the front and its second side is the back.
- the first substrate side the back and the second substrate side the front of the Paper is. In other words, be it the front or back of the paper first is freely selectable.
- the fixation of the toner is done without contact.
- a drying oven known per se, Heat and / or microwave rays and / or hot air or the like is used become.
- An embodiment variant in which the toner is particularly preferred fixed exclusively with the help of ultraviolet rays, i.e. in the melted state State is networked.
- the melting of the toner can be done here, for example, with the help or exclusively by infrared rays, hot air, microwaves and / or the like respectively.
- An embodiment of the method which is characterized by that multiple toners with different colors on at least one of the Substrate sides are applied.
- the image applied to one side of the substrate thus points several colors, for example black, cyan, magenta, yellow and / or a mixed color.
- the method according to the invention is therefore not only a single color print, but also Multi-color printing can also be implemented without any problems, whereby the same applies here as well
- Glass transition point of each of the toners after first heating and fixing the Toner increases, for example by up to 10 ° C or above.
- they change Properties of the toner which, when reheated to its now new glass transition temperature or no longer becomes liquid, but a thermoplastic, rubber-like Structure. This can ensure that when printing or Coating the second substrate side of the toner already fixed on the first substrate side does not become fluid again.
- toners with different colors can be used Formation of the image or a coating on the substrate transferred and fixed.
- toners are preferred with different colors, for example the primary colors. highlight is that in connection with the present invention under the term "Coating” is understood to mean a thin layer formed by at least one toner. A “coating” can therefore also easily have several differently colored toners, so that the coating can also be multi-colored.
- an embodiment of the method is preferred, which is characterized in that that the toners are initially all on the respective substrate side to produce a Coating or an image transferred and then heated and fixed together. Only one fixing process is carried out on each of the two substrate sides. In another embodiment, it is provided that at least one the substrate sides several fixing processes to produce the image or coating be performed. For example, a toner layer can be applied after each transfer one side of the substrate, these are then immediately fixed on the substrate, the next toner layer then being applied to the substrate in a subsequent step which in turn is fixed immediately afterwards.
- toner layers are first applied to one side of the substrate, which are then melted and fixed together, in one subsequent process step onto the same substrate side a further toner layer the already fixed toner layers are transferred, which are then in a subsequent separate Fixing process is connected to the substrate.
- the method according to the invention is related can be used with a digital printing machine, i.e. a machine that, for example, according to the electrographic or electrophotographic process.
- a digital printing machine i.e. a machine that, for example, according to the electrographic or electrophotographic process.
- the procedure is can be used wherever a substrate can be made using at least one toner coated or an image is transferred to a substrate and fixed there.
- the printing press can also be a copier.
- Figure 1 shows a schematic representation of a section of a first embodiment a machine 1 for double-sided printing and / or coating of substrates.
- the substrates are paper sheets that are illustrated and / or coated on their front and back become.
- At least one curable toner is transferred to the substrate via its glass transition temperature warmed up and then through on the substrate Fixed exposure to UV rays.
- the machine 1 comprises a first printing unit 3 for generating a first image the first side of the sheet of paper, for example the front, and a second printing unit 5 for printing on the second side of the paper sheet. Between the printing units 3, 5 is a turning device 7 for one after the other in the transport direction and, if appropriate paper sheets arranged at a distance from one another, on the Function will be discussed in more detail.
- the structure and function of the first and second printing units 3, 5 is identical in this exemplary embodiment, so that in the following only the first printing unit 3 is described in more detail.
- the first printing unit 3 comprises a first transport device 9 for the paper sheets a second transport device 11 is arranged downstream in the sheet transport direction.
- the Transport devices 9, 11 each have at least two deflecting rollers over which at least one endless conveyor belt 13 or 15 is guided.
- a guide element 17 is arranged between the transport devices.
- the paper sheets in the illustration according to FIG. 1 are from the right transported to the left.
- the speeds of the first and second transport devices can be of different heights.
- a plurality of image generation and transmission devices 19A, 19B, 19C and 19D are arranged above the first transport device 9, which, in order to transfer a toner or a toner layer of different colors, onto a conveyor belt 13 that is guided past the image generation and transmission devices 19 Paper sheet is used. After all layers of toner have been transferred to the first side of the paper sheet, the first image is completely developed on the paper sheet by means of the toner and can now be fixed on the paper sheet in a subsequent processing step.
- a heating device 21 is provided above the second transport device 11, which acts on the paper sheet with the toner particles located thereon with infrared rays, hot air and / or microwaves or the like and heats them above their glass transition temperature T G.
- the heating device 21 is followed by a curing device 23, which in this exemplary embodiment has a lamp 25 which is surrounded by a reflector 27.
- the lamp 25 acts on the image to be fixed with ultraviolet rays, due to which the polymer chains of the melted toner crosslink. Crosslinking increases the glass transition temperature and the viscosity of the toner.
- the curing device 23 is followed by a cooling unit 29 which the paper sheet and the image fixed on it cools down. Then the paper sheet is sent to the turning device 7 transferred, which turns the paper sheet and to the subsequent second printing unit 5 transferred.
- "Turning the sheet of paper” means that the position of The top and bottom of the paper sheet is exchanged, so that now in the following second printing unit 5 the second side of the paper sheet, which during the pass through the first printing unit 3 on the conveyor belts 13, 15 of the transport devices 9, 11 rest, now lies on top and can be printed.
- the one in the second printing unit 5 printing process taking place is identical to that based on the previous one first printing unit 3 described printing process, so that in this respect to the previous Is referred to.
- FIG. 2 shows another embodiment of the machine 1.
- the same parts are with provided with the same reference numerals, so that reference is made to the description of FIG. 1 becomes. Only the differences are discussed in more detail below.
- the Machine 1 has only a single printing unit 3, with which both the front as well as the back of the paper sheets are printed.
- a paper sheet not shown, is transferred to the printing unit 3, in which First, the first side of the sheet of paper lying on top of the conveyor belts 13, 15 is printed with a first image.
- the printing unit 3 it becomes one-sided printed paper sheets - as indicated by an arrow 33 - to a return area 35 headed, which here is purely exemplary below the first and second transport devices 9, 11 is located.
- a third transport device 37 In the return area 35 is a third transport device 37, the turning device 7 and a fourth transport device 39 arranged.
- the sheet of paper printed on one side is used by the third transport device 37 transferred to the turning device 7, with the aid of which the position of Top and bottom of the bow is exchanged.
- From the turning device 7 Sheet of paper then passed on to the fourth transport device 39.
- the first page of the Sheet of paper is therefore on the conveyor belt of the transport device 11 on the top Conveyor belt of the transport device 37 below and on the conveyor belt of the third Transport device 39 again on top.
- Arrived from the fourth transport device 39 the paper sheet - as indicated by an arrow 41 - to the beginning of the printing unit 3 and is transferred to the first transport device 9.
- the paper sheet now runs through a second time the printing unit 3, with the second side of the sheet of paper now on top is the conveyor belt 13 and is printed with an image. After the paper sheet has left the printing unit 3 for the second time, it is - as indicated by an arrow 43 - led out of the "transport and treatment loop" of the printing unit 3.
- the exemplary embodiments of machine 1 shown in FIGS. 1 and 2 have in common that that either first the front of the sheet of paper and then its Back, or the back of the first in a first processing step Sheet of paper and only then the front is printed. Furthermore is at an advantageous embodiment, not shown, provided that the paper sheets, after the first page has been printed, a certain period of time in a Storage unit can be cached. That is, printing on the second side of the paper sheet does not take place here immediately after printing on the first sheet of paper, as in the exemplary embodiments according to FIGS. 1 and 2.
- the turning device 7 can be arranged upstream of the storage unit - or downstream in the paper transport direction his.
- the image forming and transmitting devices 19A to 19D can each be configured in this way be that the toner directly from a photoconductor, not shown, for example from an electrographic or electrophotographic image cylinder, onto the paper is transmitted. Alternatively, it is possible that the toner is first sent to an intermediate transfer device is transferred and only then from this onto the paper.
- the intermediate transfer device can be used as a transmission device for only one color or can be used for all colors. It is therefore possible that for each color respectively an intermediate transfer device is provided for each toner.
- the toner used in machine 1 can be dry or liquid. Unless liquid toner used can be organic or inorganic as the carrier liquid for the toner Liquid can be used.
- the curing device 23 does not continuously apply ultraviolet light to the melted toner, but that it emits flashes of light, whereby their UV radiation emission is sufficiently high to achieve a desired crosslinking of the polymer chains To ensure toner or the toner.
- Hardening of the toner also includes heat radiation or a combination of melting and curing the toner with the help of heat.
- the method according to the invention results from the description of FIGS. 1 and 2 just like that. It is that printing respectively Coating the front and back of the substrate in two mutually independent Processing steps are carried out.
- the first processing step the minimum transfer a layer of toner or the first image onto a first side of the substrate.
- the toner is then brought up to or above its glass transition temperature Temperature heats up and begins to melt.
- Temperature heats up and begins to melt.
- UV radiation ultraviolet radiation
- the polymer chains of the toner begin to crosslink and get longer.
- the second processing step is on the second side of the substrate transfers at least one layer of toner or a second image, then heated to a temperature equal to or greater than the glass transition temperature of the toner.
- its glass transition temperature can already be that on the first substrate side fixed toner image can be heated to a temperature that is easily above the new glass transition temperature of the toner located on the first substrate side.
- Smearing of the toner fixed on the first substrate side on a base, for example a conveyor belt or roller, due to a relative movement between the Base and substrate can still be excluded because the first toner image due to the cross-linking of its toner material, even when heated, also above its glass transition temperature no longer becomes fluid, but takes on a rubber-like structure.
- a negative influence on the toner fixed on the first substrate side during the Printing and the associated heating of the second substrate side occurs not on. Contamination of the transport devices, as is the case, for example 1 and 2 are described, can therefore be excluded with certainty. Furthermore, the first image on the first substrate side through the second printing process not affected, so that the image quality, especially the gloss of the first image the printing of the second side of the substrate is preferably not, but at least in one only very small dimensions is affected.
- a liquid toner can also be used for the method according to the invention be used, which is in an organic or inorganic liquid or is solved in this.
- references used in the subclaims point to the further training of the Subject of the main claim by the features of the respective sub-claim back; they are not a waiver of achieving an independent, objective To understand protection for the combinations of features of the related subclaims.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
- Combination Of More Than One Step In Electrophotography (AREA)
- Printing Methods (AREA)
- Counters In Electrophotography And Two-Sided Copying (AREA)
Abstract
Description
- Figur 1
- einen Ausschnitt eines ersten Ausführungsbeispiels einer Druckmaschine zur Durchführung des erfindungsgemäßen Verfahrens; und
- Figur 2
- ein weiteres Ausführungsbeispiel der Druckmaschine.
- 1
- Maschine
- 3
- erste Druckeinheit
- 5
- zweite Druckeinheit
- 7
- Wendeeinrichtung
- 9
- erste Transporteinrichtung
- 11
- zweite Transporteinrichtung
- 13
- Transportband
- 15
- Transportband
- 17
- Führungselement
- 19
- Bilderzeugungs- und Übertragungseinrichtung
- 21
- Heizeinrichtung
- 23
- Aushärteeinrichtung
- 25
- Lampe
- 27
- Reflektor
- 29
- Kühleinheit
- 31
- Pfeil
- 33
- Pfeil
- 35
- Rückführungsbereich
- 37
- dritte Transporteinrichtung
- 39
- vierte Transporteinrichtung
- 41
- Pfeil
- 43
- Pfeil
Claims (14)
- Verfahren zum doppelseitigen Bedrucken und/oder Beschichten eines Substrats, insbesondere von Papier oder Karton, unter Verwendung mindestens eines flüssigen oder trockenen, mindestens ein Polymer aufweisenden Toners, mit folgenden Schritten:Übertragung mindestens einer Tonerschicht oder eines ersten, mindestens eine Tonerschicht aufweisenden Bildes auf eine erste Seite des Substrats,Erwärmung des Toners auf seine Glasübergangstemperatur oder eine darüber liegende Temperatur und Fixierung des Toners auf dem Substrat, wobei sich dabei der ursprüngliche Glasumwandlungspunkt des Toners in Folge der Vernetzung seiner Polymerketten auf ein höheres Temperaturniveau verschiebt,Übertragung mindestens einer Tonerschicht oder eines zweiten, mindestens eine Tonerschicht aufweisenden Bildes auf die andere, zweite Seite des Substrats, undErwärmung des auf der zweiten Seite des Substrats befindlichen Toners auf eine Temperatur, die gleich groß wie oder größer als seine Glasübergangstemperatur ist.
- Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass die Aufheizen des Toners berührungslos, vorzugsweise mittels Wärme- und/oder Mikrowellenstrahlen und/oder Heißluft erfolgt. - Verfahren nach einem der vorhergehenden Ansprüche 1 oder 2,
dadurch gekennzeichnet, dass das Vernetzen des Toners mittels UV(ultravioletten)-Strahlen, insbesondere ausschließlich durch UV-Strahlen, erfolgt. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der Toner nach dem Fixieren auf dem Substrat gekühlt wird. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass das Substrat nach der Übertragung, Erwärmung und Fixierung und gegebenenfalls Kühlung der/des auf die erste Substratseite aufgebrachten Beschichtung oder des ersten Bildes eine bestimmte Zeitdauer zwischengespeichert wird, bevor eine Beschichtung oder das zweite Bild auf die zweite Substratseite aufgebracht wird. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass mehrere -vorzugsweise bis zu sieben, insbesondere vier- Toner mit verschiedenen Farben auf mindestens eine der Substratseiten aufgebracht werden. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Toner zunächst alle auf die jeweilige Substratseite übertragen und dann gemeinsam erwärmt und fixiert werden. - Verfahren nach einem der vorhergehenden Ansprüche 1 bis 6,
dadurch gekennzeichnet, dass auf mindestens einer der Substratseiten mehrere Fixiervorgänge zur Erzeugung des Bildes oder der Beschichtung durchgeführt werden. - Verfahren nach Anspruch 8,
dadurch gekennzeichnet, dass nach jedem Übertragen einer Tonerschicht auf eine Substratseite diese unmittelbar daran anschließend auf dem Substrat fixiert wird und dass in einem nachfolgenden Schritt die nächste Tonerschicht auf das Substrat beziehungsweise die zuvor fixierte Tonerschicht übertragen und anschließend fixiert wird. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die mindestens eine Tonerschicht aufgeschmolzen und zur Vernetzung der Polymerketten mit ultraviolettem Licht beaufschlagt wird. - Verfahren nach Anspruch 10,
dadurch gekennzeichnet, dass die UV-Strahlung zur Erzeugung von UV-Lichtblitzen getaktet ist. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass zur Vernetzung der Polymerketten der Toner mit Wärmestrahlung beaufschlagt wird. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass das Aufschmelzen des Toners und das Vernetzen der Polymerketten durch Wärmezuführung erfolgt. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass es im Zusammenhang mit einer digitalen Druck-, Kopier- oder Beschichtungsmaschine einsetzbar ist.
Applications Claiming Priority (2)
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DE10064560A DE10064560A1 (de) | 2000-12-22 | 2000-12-22 | Verfahren zum doppelseitigen Bedrucken und/oder Beschichten eines Substrats |
DE10064560 | 2000-12-22 |
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EP1217467A2 true EP1217467A2 (de) | 2002-06-26 |
EP1217467A3 EP1217467A3 (de) | 2006-03-15 |
EP1217467B1 EP1217467B1 (de) | 2008-01-09 |
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EP01127118A Expired - Lifetime EP1217467B1 (de) | 2000-12-22 | 2001-11-15 | Verfahren zum doppelseitigen Bedrucken und/oder Beschichten eines Substrats |
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US (1) | US6535711B2 (de) |
EP (1) | EP1217467B1 (de) |
JP (1) | JP2002251085A (de) |
DE (2) | DE10064560A1 (de) |
Families Citing this family (18)
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DE10064552B4 (de) * | 2000-12-22 | 2004-10-07 | Nexpress Solutions Llc | Verfahren und Maschine zum Bedrucken und/oder Beschichten eines Substrats |
US6713222B2 (en) * | 2002-02-28 | 2004-03-30 | Xerox Corporation | Curing processes |
JP2003295688A (ja) * | 2002-04-04 | 2003-10-15 | Canon Inc | 画像形成装置 |
DE10301587A1 (de) * | 2003-01-17 | 2004-08-05 | Nexpress Solutions Llc | Verfahren und Transporteinrichtung zum Vorfixieren von Toner auf einem Bedruckstoff |
JP4556444B2 (ja) * | 2003-03-27 | 2010-10-06 | コニカミノルタホールディングス株式会社 | 画像記録装置 |
US7184698B2 (en) * | 2004-03-17 | 2007-02-27 | Eastman Kodak Company | Durable electrophotographic prints |
DE102004043920A1 (de) * | 2004-09-10 | 2006-03-30 | OCé PRINTING SYSTEMS GMBH | Verfahren zur Modifikation von Eigenschaften von auf einem Bildträger aufgebrachten Tonerbildern bei einer elektrografischen Druck- oder Kopiereinrichtung |
US7550244B2 (en) * | 2006-06-14 | 2009-06-23 | Eastman Kodak Company | Reactive polymer particles and method of preparation |
JP2008040212A (ja) * | 2006-08-08 | 2008-02-21 | Konica Minolta Business Technologies Inc | 両面画像形成方法 |
WO2009076984A1 (en) * | 2007-12-17 | 2009-06-25 | Eastman Kodak Company | Method and apparatus for fusing a heat curable toner to a carrier sheet |
WO2010066267A1 (en) * | 2008-12-09 | 2010-06-17 | Eastman Kodak Company | A method of fixing a heat curable toner to a carrier substrate |
DE102012103343A1 (de) * | 2012-04-17 | 2013-10-17 | Océ Printing Systems GmbH & Co. KG | Verfahren zum Betreiben eines Digitaldruckers unter Beaufschlagung eines Aufzeichnungsträgers mit Ionen sowie zugehöriger Digitaldrucker |
DE102013201552B4 (de) * | 2013-01-30 | 2017-03-30 | Océ Printing Systems GmbH & Co. KG | Druckanordnung zum beidseitigen Bedrucken eines Aufzeichnungsträgers und Druckverfahren |
NL2013107B1 (en) * | 2014-07-02 | 2016-09-13 | Xeikon Ip Bv | A multicolour printing process and a liquid toner composition. |
US9804539B2 (en) * | 2015-05-27 | 2017-10-31 | Canon Kabushiki Kaisha | Image forming apparatus and image forming method |
US9939760B2 (en) * | 2015-12-24 | 2018-04-10 | Canon Kabushiki Kaisha | Image forming apparatus |
EP3383662B1 (de) | 2016-01-08 | 2020-09-02 | Entrust Datacard Corporation | Kartendruckmechanismus kartenrückweg |
JP2019020630A (ja) * | 2017-07-19 | 2019-02-07 | 株式会社ミマキエンジニアリング | 電子写真プリンタ及び印刷方法 |
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Also Published As
Publication number | Publication date |
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EP1217467A3 (de) | 2006-03-15 |
DE50113470D1 (de) | 2008-02-21 |
JP2002251085A (ja) | 2002-09-06 |
EP1217467B1 (de) | 2008-01-09 |
US20020141791A1 (en) | 2002-10-03 |
US6535711B2 (en) | 2003-03-18 |
DE10064560A1 (de) | 2002-06-27 |
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