CN1790183A - Image forming apparatus - Google Patents
Image forming apparatus Download PDFInfo
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- CN1790183A CN1790183A CN 200510133933 CN200510133933A CN1790183A CN 1790183 A CN1790183 A CN 1790183A CN 200510133933 CN200510133933 CN 200510133933 CN 200510133933 A CN200510133933 A CN 200510133933A CN 1790183 A CN1790183 A CN 1790183A
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Abstract
An image forming apparatus is provided in which a toner is prevented from flowing and being agglomerated, at the time of application of a fixer fluid to a toner image so as to fix the toner image to a recording medium, and the recording medium is prevented from generating curl and wrinkle, and consumption of the fixer fluid and electricity can be reduced, and even a multicolored toner image can be fixed for a relatively short time. An image forming apparatus includes a toner image forming section, an intermediate transfer section, a secondary transfer section, a heating section, a fixer fluid applying section, and a recording medium supplying section. A recording medium carrying the toner image on a surface thereof is heated by the heating section and then, a fixer fluid is applied to the toner image by the fixer fluid applying section so that the toner image is fixed.
Description
Technical field
The present invention relates to a kind of image processing system.
Background technology
At duplicating machine, printer, in the image processing system of the electrofax mode that extensively adopts in the facsimile recorder etc., use forms the photoreceptor of the photographic layer that contains the photoconductivity material on the surface, attached with electric charge and make it uniform charged to photosensitive surface, in various image-forming steps, form the electrostatic latent image corresponding afterwards with image information, this electrostatic latent image is developed by the developer that is provided by developing cell and contain toner, make toner image, and this toner image directly is transferred on the recording mediums such as paper, or after temporarily being transferred to intermediate transfer medium, further be transferred on the recording medium.And, in order to make the toner image photographic fixing that is transferred to recording medium to recording medium, generally contain the fixation unit of hot photographic fixing mode of the developer roll etc. of heating part by utilization, recording medium is heated and pressurizes.
Image processing system as hot photographic fixing mode, for example comprise with lower device: open the intermediate transfer belt of frame as intermediate transfer medium with warm-up mill, to middle transfer belt, and intermediate transfer belt on the toner image that forms heat, transfer-fixing (is for example opened flat 10-63121 communique with reference to the spy) to recording medium under heated condition.Image processing system in the Te Kaiping 10-63121 communique has the less feature of the electric power of consumption.But in this image processing system owing to do not carry out the heating of recording medium, if therefore when transfer-fixing toner image contact with recording medium, then the temperature of toner image descends, thus generation toner image image deflects such as photographic fixing, skew not.
And, as the spy opens flat 10-63121 communique, image processing system as described below (for example the spy opens the 2004-151626 communique) has been proposed also: the toner image on the middle transfer belt is heated, and also to the recording medium before the toner image transfer-fixing is heated, under heated condition with the toner image transfer-fixing to recording medium.
Open in the image processing system of 2004-151626 communique the spy, though toner image is improved to the photographic fixing power of recording medium, but not only to heat toner image, and add thermal recording media, and the heating of toner image and recording medium needs the big heating part of thermal capacity, therefore under present situation, consume electric power and become big, occupy the over half of whole consumption electric power in the image processing system.On the other hand, countermeasure as preventing global warmingization requires energy-conservationization, and being extensive use of along with the image processing system of electrofax mode, in the image processing system of electrofax mode, the consumption electric power when requiring reduction that recording medium is arrived in the toner image photographic fixing.And in hot photographic fixing mode, as mentioned above, in the inner heating part of using of device, device inside becomes high temperature, therefore needs to improve the thermotolerance of component parts, and material cost increases.And, in hot photographic fixing mode,, so have the elongated tendency of time, the preheating time of being till the predetermined temperature of arrival if just can't not carry out photographic fixing because the photographic fixing part does not rise to predetermined temperature.Further, in hot photographic fixing mode, also exist the polychrome toner image to compare the problem that needs the time with the photographic fixing of monochromatic toner image to the recording medium photographic fixing.Therefore, require to shorten the fixing time of polychrome toner image.
In view of above requirement, known have a wet fixing method, and this method is used and contained water and solubilized or be scattered in water and have the stop bath of the liquid that makes the softening or expansion of toner.Under this method, be attached on the recording medium by smearing the toner image that stop bath constitutes the toner by softening or swelling state, make the toner image photographic fixing to recording medium by pressurization.The wet fixing method compare with hot photographic fixing mode the electric power that consumes considerably less, therefore be useful method from energy-conservation angle.And, from the angle of polychrome toner image fixing time,, therefore compare with hot fixation method owing to need not a large amount of heats, can shorten fixing time.Therefore, the further improvement at the wet fixing method has proposed various schemes.
Following fixing device is for example proposed: for the toner image that is carried on intermediate transfer medium or the recording medium, only smear stop bath from stop bath ejection portion, the stop bath of smearing is heated (for example opening the 2004-109747 communique with reference to the spy) to the toner attachment portion with a plurality of fine holes.That is, in this fixing device, adopt the mode that after the toner image that stop bath is applied on intermediate transfer medium or the recording medium, heats.But, not the toner image of photographic fixing at room temperature, the toner particle does not have physics or chemical coupling power, only be the set piece.Therefore, when directly smearing the such liquid material of stop bath to the toner image of not photographic fixing, then the toner particle can soften and/or expand, and causes flowing or condensing of toner particle easily.Consequently, image border after the photographic fixing produces infiltration, and partly produces inhomogeneously should be uniform shadow tone, can't obtain the image of high-grade image quality.Certainly, even heat, also can't return to original state in the back of flowing or condense that the toner particle takes place.
And, open in the fixing device of 2004-109747 communique the spy, when making intermediate transfer medium carrying toner image, implement water-proofing treatment such as fluorine processing to intermediate transfer belt as intermediate transfer medium, even therefore smear stop bath to this intermediate transfer body, stop bath also exists only in toner part (image portion), can not retain at the part that does not have the toner between toner image (non-image portion) stop bath.But, when to recording medium partial smearing stop bath,, do not produce flexiblely in non-image portion owing to produce flexiblely in image portion, therefore can't avoid with image portion is the generation of the fold at center.Particularly as recording medium, when using the recording paper of making being distributed to the fiber combinations in the water, this tendency is comparatively obvious.Certainly,, then can not produce this problem, but, therefore be difficult to correctly measure minimum limiting the quantity of because minimum limiting the quantity of is extremely small amount if smear the toner necessary minimum stop bath of limiting the quantity of that expands.And when only when the toner attachment portion is smeared stop bath, the non-image portion around the toner attachment portion because of bluring the toner that adheres to not by photographic fixing, and remains on the recording medium can make dirty hand or clothes etc.
And, open in the image processing system of flat 10-63121 communique the spy, when the toner image transfer-fixing on the transfer belt that will be in heated condition arrives the recording medium of non-heating, can consider to smear stop bath to toner image.But, open as described in the flat 10-63121 communique as the spy, when when transfer-fixing, not carrying out heat supply and not adopting other special countermeasures,, need a large amount of stop baths for the adhesion that improves toner image and recording medium and the adhesion between the toner particle.When a large amount of use stop bath, can't avoid producing on the recording medium fold or bending etc.And, need supply stop bath continually, perhaps need jumbo stop bath storage tank, thus the miniaturization of the maintainability of impairing or device.
Summary of the invention
The object of the present invention is to provide a kind of image processing system, it is when utilizing aqueous stop bath that recording medium is arrived in the toner image photographic fixing, can not produce the caused toner image confusion that flows, condenses of toner, recording medium can not produce bending or fold etc., and can reduce stop bath and consumption of heat energy amount, even further to the polychrome toner image also time photographic fixing of weak point, it is little to consume electric power.
The present invention is a kind of image processing system, it is characterized in that, has: the toner image formation portion that forms toner image; To be transferred to the transfer printing portion on the recording medium by the toner image that the toner image portion of formation forms; Heating part to the heating of recording medium surface; With the stop bath spreader portion, stop bath is smeared on surface to recording medium, described stop bath is by making toner softening and/or expand and make the toner photographic fixing to recording medium, wherein, heating part and stop bath spreader portion are set, with before recording medium being smeared stop bath or smearing in the stop bath, the recording medium surface is heated by the heating part by the stop bath spreader portion.
According to the present invention, a kind of image processing system is provided, it has toner image formation portion, with toner image is transferred to the transfer printing portion of recording medium, heating part that the toner image on the recording medium is heated and the toner image on recording medium are smeared stop bath stop bath spreader portion, wherein, before stop bath being smeared on the recording medium surface or smearing in the stop bath, the recording medium surface is heated by the heating part by the stop bath spreader portion.
This image processing system, since with a heating part to the recording medium of carrying toner image, be that toner image and recording medium heat, toner image and recording medium were heated to less heat and short time are suitable for making the toner image photographic fixing to arrive the temperature of recording medium.And, in device of the present invention, owing to behind the recording medium that has heated the carrying toner image or in the heating, stop bath is applied on the toner image, therefore the temperature of toner image and recording medium appropriateness rises, the liquid temperature of the stop bath after smearing is risen, and stop bath is also very fast to the diffusion and the infiltration of toner image.Consequently, the softening and/or expansion that constitutes almost whole toners of toner image took place in moment, can prevent flowing, condensing of toner, and toner image and recording medium adhere to securely at short notice.Further, as mentioned above,, therefore can make it dry at short notice to unnecessary stop bath because the liquid temperature of the stop bath after smearing rises.The output number that these advantages helped under unit interval of image processing system is the raising of handling capacity.In addition, the also less generation fold of recording medium, bending etc.
And the present invention is a kind of image processing system, it is characterized in that, has: the toner image formation portion that forms toner image; Intermediate transfer portion, contain intermediate transfer medium, the first toner image carrier of this intermediate transfer medium toner image that to be transfer printing formed by the toner image portion of formation, it is made of material of impermeable stop bath on the surface at least, and described stop bath is by making toner softening and/or expand and make the toner image photographic fixing to recording medium; The heating part is to middle offset medium or the heating of the toner image carrier beyond it; The stop bath spreader portion is smeared stop bath to intermediate transfer medium or the toner image carrier beyond it; With transfer-fixing portion, to the toner image transfer printing of stop bath and photographic fixing have been smeared to recording medium, wherein, heating part and stop bath spreader portion are set, with before the toner image carrier beyond middle offset medium or its being smeared stop bath or smearing in the stop bath, middle offset medium or the toner image carrier beyond it are heated by the heating part by the stop bath spreader portion.
And, according to the present invention, a kind of image processing system is provided, it has toner image formation portion, the intermediate transfer portion of containing at least the intermediate transfer medium that the surface is made of the material of impermeable stop bath, heating part to the toner image heating on middle offset medium or the toner image carrier beyond it, the stop bath spreader portion that toner image on intermediate transfer medium or the toner image carrier beyond it is smeared stop bath, with the toner image transfer printing that will smear stop bath and photographic fixing transfer-fixing portion to recording medium, wherein, before middle offset medium being smeared stop bath or smearing in the stop bath, middle offset medium or the toner image carrier beyond it are heated by the heating part by the stop bath spreader portion.
This image processing system, with a heating part to carrying intermediate transfer medium of toner image or the toner image carrier beyond it, be that toner image and intermediate transfer medium or the toner image carrier beyond it heat, toner image and intermediate transfer medium or the toner image carrier beyond it were heated to less heat and short time are suitable for making the temperature of toner image photographic fixing to recording medium.And, in device of the present invention, owing to behind intermediate transfer medium that has heated the carrying toner image or the toner image carrier beyond it or in the heating, stop bath is applied on the toner image, therefore the temperature appropriateness of toner image and intermediate transfer medium or the toner image carrier beyond it rises, the liquid temperature of the stop bath after smearing is risen, and stop bath is also very fast to the diffusion and the infiltration of toner image.Consequently, the softening and/or expansion that constitutes almost whole toners of toner image took place in moment, can prevent flowing, condensing of toner, and toner image and recording medium adhere to securely at short notice.Further, as mentioned above,, therefore can make it dry at short notice to unnecessary stop bath because the liquid temperature of the stop bath after smearing rises.The output number that these advantages helped under unit interval of image processing system is the raising of handling capacity.In addition, the also less generation fold of recording medium, bending etc.
And, because to the surperficial at least first toner image carrier that is made of the material of impermeable stop bath is to smear stop bath on the intermediate transfer medium, therefore can occur hardly that stop bath does not act on toner and the situation that is absorbed into the toner image carrier inside, can reduce the use amount of stop bath.
And, in this image processing system, always smear the stop bath of constant basis by the toner image of intermediate transfer medium carrying.And it is more or less freely that sensors such as temperature detection sensor are set to intermediate transfer medium, by having utilized the FEEDBACK CONTROL of sensor, can implement the heating of the intermediate transfer medium under the steady temperature.Therefore, stop bath can be implemented under constant condition to transfer-fixing of recording medium etc. to the smearing of toner image, toner image, so can always obtain high quality images.And, when recording medium is smeared stop bath,, need to change the applying amount of stop bath etc. according to the kind (perviousness of material, stop bath, thickness etc.) of recording medium, also be not easy to be used for the setting of sensor of the surface temperature of detection record medium.
And the present invention is a kind of image processing system, it is characterized in that, has: the toner image formation portion that forms toner image; Intermediate transfer portion, contain intermediate transfer medium, the first toner image carrier of this intermediate transfer medium toner image that to be transfer printing formed by the toner image portion of formation, its surperficial at least material by impermeable stop bath constitutes, described stop bath is by making toner softening and/or expand and make the toner image photographic fixing to recording medium, the heating part is to middle offset medium or the heating of the toner image carrier beyond it; The stop bath spreader portion is smeared stop bath to intermediate transfer medium or the toner image carrier beyond it; With transfer-fixing portion, recording medium is arrived in the toner image transfer printing and the photographic fixing of having smeared stop bath, wherein, heating part and transfer-fixing portion are set, so that carry out in the transfer-fixing of recording medium toner image in transfer-fixing portion the heating of middle offset medium or the toner image carrier beyond it heating part.
And, according to the present invention, a kind of image processing system is provided, it has toner image formation portion, the intermediate transfer portion of containing at least the intermediate transfer medium that the surface is made of the material of impermeable stop bath, the stop bath spreader portion that toner image carrier beyond middle offset medium or its is smeared stop bath, the heating part that toner image carrier beyond middle offset medium or its is heated, the toner image transfer printing of stop bath and the transfer-fixing portion that recording medium is arrived in photographic fixing will have been smeared, wherein, carry out the transfer-fixing of toner image to recording medium with transfer-fixing portion simultaneously to the heating of middle offset medium the heating part.
Image processing system, with a heating part to carrying intermediate transfer medium of toner image or the toner image carrier beyond it, be that toner image and intermediate transfer medium or the toner image carrier beyond it heat, toner image and intermediate transfer medium or the toner image carrier beyond it were heated to less heat and short time are suitable for making the temperature of toner image photographic fixing to recording medium.
And, owing to be when transfer-fixing, to heat, therefore when the toner image transfer-fixing behind recording medium, because of the surface temperature of toner image carrier uprises, thereby the stop bath by remaining in the toner image carrier surface and stop bath can make the toner drying at short notice that is in moisture state.Consequently, the aqueous composition of stop bath makes the parts that constitute toner image formation portion moistening, can prevent the toner image confusion reigned.Therefore can obtain in long-time, to keep certain high quality images.
And, according to the present invention, when before the carrying recording medium of toner image or intermediate transfer medium are smeared stop bath or when smearing stop bath toner image being heated, by directly adding the Zone Full of smearing stop bath of thermal recording media or intermediate transfer medium, can prevent that stop bath from smearing the temperature of the toner image that causes and recording medium or intermediate transfer medium and reducing, and can promote the diffusion, infiltration etc. of the stop bath of stop bath after smearing.Consequently, the softening and/or instantaneous generation in the larger context of expanding of toner, toner image extremely is firmly adhered on the recording medium at short notice.Further, owing to improved the liquid temperature of the stop bath after smearing, therefore can make stop bath at shorter time inner drying.The output number that these advantages helped under the unit interval of image processing system is the raising of handling capacity.
Further, in the present invention, it is characterized in that, at least the toner in recording medium or intermediate transfer medium or other toner image carriers is formed the zone, heat by the heating part, and smear stop bath by the stop bath spreader portion.
And, according to the present invention, at least the toner in recording medium or intermediate transfer medium or other toner image carriers is formed the zone, heat by the heating part, and smear stop bath by the stop bath spreader portion, replenish the heat that the coating because of stop bath causes toner image and recording medium temperature to descend and carry out simultaneously thereby can make with temperature decline.Therefore, after smearing stop bath, stop bath promptly spreads, permeates, and softening, the moment of expanding of toner take place in a big way, can obtain sufficient fixing strength at short notice.Further, the liquid temperature of remaining stop bath keeps higherly after the toner image photographic fixing, therefore can dry at short notice stop bath.The output number that these advantages helped under unit interval of image processing system is the raising of handling capacity.
And the present invention is a kind of image processing system, it is characterized in that, has: the toner image formation portion that forms toner image; Intermediate transfer portion, contain intermediate transfer medium, the first toner image carrier of this intermediate transfer medium toner image that to be transfer printing formed by the toner image portion of formation, it is made of material of impermeable stop bath on the surface at least, and described stop bath is by making toner softening and/or expand and make the toner image photographic fixing to recording medium; The stop bath spreader portion forms the zone to the toner image of intermediate transfer medium at least and smears stop bath; The heating part, the toner image to middle offset medium forms the zone heating at least; With transfer-fixing portion, recording medium is arrived in the toner image transfer printing and the photographic fixing of having smeared stop bath, wherein, heating part, stop bath spreader portion and transfer-fixing portion are set, so that carry out after by the stop bath spreader portion toner image forming area being smeared stop bath the heating of toner image forming area the heating part, and, by the heating part to heating with the zone of recording medium butt in the middle offset medium.
And, according to the present invention, a kind of image processing system is provided, it has toner image formation portion, the intermediate transfer portion of containing the intermediate transfer medium that the material by impermeable stop bath constitutes, at least the toner image to intermediate transfer medium forms the stop bath spreader portion that stop bath is smeared in the zone, at least the toner image to middle offset medium forms the heating part that heat in the zone, make the toner image transfer printing of having smeared stop bath and photographic fixing transfer-fixing portion to recording medium, wherein, carry out after the stop bath spreader portion is smeared the stop bath of toner image forming area the heating of toner image forming area the heating part, and by the heating part to heating with the zone of recording medium butt in the middle offset medium.
This image processing system, with a heating part to the intermediate transfer medium of carrying toner image, be that toner image and intermediate transfer medium heat, toner image and intermediate transfer medium were heated to less heat and short time are suitable for making the temperature of toner image photographic fixing to recording medium.
And,, therefore optionally toner and recording medium softening by stop bath and/or that expand are heated because the toner image carrier of impermeable stop bath is heated in the transfer-fixing position.So, when transfer-fixing, can further promote the softening and/or expansion of toner, further improve the adhesion (fixing strength) of toner image, behind transfer-fixing, can reduce the toner amount that remains in the toner image carrier surface recording medium.And, because toner is softening and/or expand by stop bath, therefore compare with hot photographic fixing mode, can be with less heat (lower heating-up temperature) obtains and hot photographic fixing mode the is equal or higher toner image and the adhesion of recording medium.
And then, in the present invention, it is characterized in that the heating part is the high temperature of glass transition temperature than the toner that forms toner image to the heating-up temperature of toner image.
And, according to the present invention, by using the high temperature of glass transition temperature that toner image is heated than the toner that constitutes toner image, can further promote the softening and/or expansion of toner, can further improve and reach the adhesion of toner between the toner with respect to recording medium.Consequently, when stop bath is smeared, can prevent that toner that smearing of stop bath cause from flowing.
Further, in the present invention, it is characterized in that the heating part is the high temperature of softening point than the toner that forms toner image to the heating-up temperature of toner image.
And, according to the present invention, toner image is heated by using the high temperature of softening point than the toner that constitutes toner image, can further promote the softening and/or expansion of toner, can further improve and reach the adhesion of toner between the toner with respect to recording medium.Therefore, when stop bath is smeared, can prevent effectively further that toner that smearing of stop bath cause from flowing.
Further, in the present invention, it is characterized in that transfer-fixing portion, also comprise the second toner image carrier that can have the heating part in surface bears toner image and its inside, the stop bath spreader portion is set to: smear stop bath to the toner image that the second toner image carrier is carried.
And, according to the present invention, image processing system as described below is provided: transfer-fixing portion comprises the second toner image carrier, in the second toner image carrier inside heating part is set, and the stop bath spreader portion that the toner image of being carried to the second toner image carrier is smeared stop bath is set.
In this image processing system, owing to smear stop bath to the toner image that the toner image carrier different with intermediate transfer medium (the second toner image carrier) carried, therefore stop bath can be attached to intermediate transfer medium hardly, and stop bath can not be attached to the component parts beyond the intermediate transfer medium in the intermediate transfer portion and the component parts of toner image formation portion by intermediate transfer medium.And, misaligning a structure of offset medium heating owing to having adopted the toner image that the second toner image carrier is carried to heat, the temperature that therefore component parts of intermediate transfer portion and toner image formation portion can not take place substantially rises.This advantage helps in toner image forming process and toner image intermediate transfer process, prevents the toner deterioration that stop bath and temperature rise and cause, but can obtain the high quality images of stable for extended periods of time.And, inboard heating toner image from the second toner image carrier, and smear stop bath from the lateral toner image of the second toner image carrier, thereby can obviously promote the softening and/or expansion of toner, obviously improve the adhesion of toner, can obtain the image higher the fixing strength of recording medium to recording medium.
Further, in the present invention, it is characterized in that transfer-fixing portion also comprises: temperature detecting part, detect the surface temperature of the second toner image carrier; With the first applying amount control part, according to the testing result from temperature detecting part, control is applied to the applying amount of the stop bath of toner image by the stop bath spreader portion.
Further, in the present invention, it is characterized in that, the first applying amount control part, the action of control stop bath spreader portion, so that the stop bath applying amount of the surface temperature of the second toner image carrier that detects by temperature detecting part when being lower than first predetermined temperature, be that first predetermined temperature or its are many when above than the surface temperature of the second toner image carrier.
According to the present invention, transfer-fixing portion, temperature detecting part by the surface temperature that detects the second toner image carrier is set and according to the first applying amount control part of the applying amount of the stop bath of smearing to toner image by the stop bath spreader portion from the testing result control of temperature detecting part, even the surface temperature of the second toner image carrier changes, also can obtain to have the photographic fixing image of sufficient fixing strength with respect to recording medium.For example, even the surface temperature of the second toner image carrier is following between the warming up period that is lower than predetermined temperature (design temperature), applying amount by making stop bath is many during than first predetermined temperature (design temperature), compares the photographic fixing image that does not have the fixing strength that changes in the time of can obtaining to have with design temperature.Further, when the surface temperature of toner image carrier was higher than first predetermined temperature, the applying amount by reducing stop bath or stop to smear can reduce the consumption of stop bath.
Further, in the present invention, it is characterized in that transfer-fixing portion also comprises: via the pressure-producing part of the recording medium and the second toner image carrier crimping; Detect the pressure-producing part temperature detecting part of the surface temperature of pressure-producing part; With the second applying amount control part, according to testing result from the pressure-producing part temperature detecting part, the applying amount of the stop bath that control is smeared to toner image by the stop bath spreader portion, the second applying amount control part, the action of control stop bath spreader portion, so that the stop bath applying amount of the surface temperature of the pressure-producing part that detects by the pressure-producing part temperature detecting part when being lower than second predetermined temperature, be that second predetermined temperature or its are many when above than the surface temperature of pressure-producing part.
And, according to the present invention, transfer-fixing portion has: with the pressure-producing part of the second toner image carrier surface crimping, detect the pressure-producing part temperature detecting part of the surface temperature of pressure-producing part, according to from the second applying amount control part of the testing result of pressure-producing part temperature detecting part control to the applying amount of the stop bath of toner image, set the second applying amount control part, when making the surface temperature of pressure-producing part be lower than second predetermined temperature (design temperature), with be second predetermined temperature or compare more than it, increase the stop bath adhesion amount, thus can obtain with the surface temperature of pressure-producing part irrespectively, the relative record medium has the photographic fixing image of sufficient fixing strength.For example, when the surface temperature of pressure-producing part is lower than second predetermined temperature, by increasing the stop bath applying amount, compare in the time of can obtaining to have with second predetermined temperature photographic fixing image of the fixing strength that not have variation.Further, when the surface temperature of pressure-producing part was higher than second predetermined temperature, the applying amount by reducing stop bath or stop to smear can reduce the consumption of stop bath.
Further, in the present invention, it is characterized in that the stop bath spreader portion comprises: the toner amount test section that detects the toner amount in the toner image; With the stop bath applying amount control part that can partly change the applying amount of stop bath, be that scheduled volume or the toner image more than the scheduled volume are smeared stop bath only to the toner amount according to control signal from toner amount test section.
And, according to the present invention, in image processing system of the present invention, the stop bath spreader portion has the toner amount test section of the toner amount that detects toner image, and according to stop bath applying amount control part from the applying amount of the signal change stop bath of toner amount test section, smear stop bath by the part that only the toner amount is Duoed than set amount in toner image, can further reduce the stop bath consumption.
That is, toner is the powder that is made of resin, because lower, more at the toner adhesion amount, that toner layer thickness the is bigger part of thermal conductivity, more away from the difficult more rising of transfer-fixing portion temperature.The thickness of toner image self is for counting μ m to tens of μ m, and in the instantaneous image processing system that carries out transfer-fixing, even toner image only has the thickness difference about several μ m, also can produce Temperature Distribution, be the fluctuation of temperature, the fixing strength of toner image with respect to recording medium produced a very large impact.Therefore, in the more part of toner adhesion amount, the softening of toner becomes insufficient, with the adhesion decline of recording medium.By adopting said structure, the decline of this adhesion can obtain recording medium is had the photographic fixing image of abundant fixing strength by next the replenishing of smearing of stop bath.On the other hand, in the few part of toner adhesion amount, toner layer integral body becomes the softening temperature of sufficient toner, even therefore do not smear stop bath, also can guarantee the fixing strength with recording medium.
And, in the few part of toner adhesion amount,, mainly be adhering to of toner and recording medium, even therefore photographic fixing figure image curvature also is difficult to take place the situation that toner comes off from recording medium because adhering between the toner is less.Relative with it, in the many parts of toner adhesion amount, mainly be adhering between the toner, and photographic fixing is on recording medium, therefore when smearing photographic fixing figure image curvature etc. from the stress of outside, toner comes off from recording medium sometimes.Therefore, in the more part of toner adhesion amount, need to improve the adhesion between recording medium and the toner.Particularly, smear stop bath, make the surface of contact infiltration of stop bath, thereby can significantly increase the adhesion of toner image and recording medium from toner and recording medium in the many parts of toner adhesion amount.So, even smear the stress from the outside such as bending, can also obtain the photographic fixing image that toner image can not come off.
Further, in the present invention, it is characterized in that, also comprise the stop bath heat-insulation unit of stop bath being carried out heat tracing.
And, according to the present invention, in image processing system of the present invention, by the stop bath heat-insulation unit of stop bath being carried out heat tracing is set, the temperature that can prevent the toner when stop bath is smeared descends, along with the toner that stop bath and heating cause is softening, can be with the toner guiding for being suitable for most the soft state of transfer-fixing.
Further, in the present invention, it is characterized in that stop bath contains increases the bonding agent of toner image to the adhesion of recording medium.
And, according to the present invention, containing in the stop bath increases the bonding agent that toner image is attached to the adhesion of recording medium, thereby make not only the softening and/or expansion that adhere to of toner and recording medium by toner, and smear by bonding agent, therefore can improve the adhesion of toner image to recording medium, and fixing strength.
Further, in the present invention, it is characterized in that toner contains polyester as binder resin, and the glass transition temperature wax composition lower than polyester.
And according to the present invention, preferred use contains polyester as binder resin and contains the toner of the glass transition temperature wax composition lower than polyester.
Promptly, polyester is compared with other resins, be easy to softening and/or expansion by organic solvent, under the state of softening and/or expansion, become transparent, therefore work as the multiple color toner doubling of the image that constitutes by the toner that contains polyester, and during to recording medium, can obtain than the mixing chromatic colour of losing lustre by stop bath and heat fixer.
And the low wax composition of glass transition temperature that likens to the polyester of binder resin is easy to soften by heating.Therefore, under than the low low temperature of the glass transition temperature of toner, the adhesion that reaches toner and toner image carrier, recording medium etc. between the toner improves.Therefore, by heating in advance, the toner in the time of can suppressing stop bath and smear flows, condenses etc.Further, softening by the wax composition, stop bath is easy to be penetrated into from the place that has the wax composition toner particle inside.Therefore, when stop bath is smeared, the whole softening and/or expansion of toner at short notice, toner image improves the fixing strength of recording medium.
So, by using the toner of this structure, can obtain to have the photographic fixing image of abundant fixing strength and color.
Further, in the present invention, it is characterized in that the volume average particle size of toner is 2 μ m～7 μ m.
And according to the present invention, using volume average particle size is the toner particle of 2～7 μ m, thereby can obtain the photographic fixing image of the high image quality good with respect to recording medium fixing strength height, colour rendering.
Further, in the present invention, it is characterized in that stop bath also contains release agent.
And, according to the present invention, by containing release agent in the stop bath, when stop bath was smeared in the contact of the toner image on other toner image carriers such as recording medium, intermediate transfer medium, more difficult generation toner image was attached to the shift phenomenon on the parts that are used to smear stop bath.
Purpose of the present invention, characteristic and advantage can be further clear and definite by following explanation and accompanying drawing.
Description of drawings
Fig. 1 is the cut-open view of schematic representation as the formation of the image processing system of first embodiment of the present invention.
Fig. 2 is the cut-open view that the major part of image processing system shown in Figure 1 is constituted the amplification expression.
Fig. 3 is the cut-open view that the major part of image processing system shown in Figure 1 is constituted the amplification expression.
Fig. 4 is the cut-open view that schematically is illustrated in the formation of employed fixing roller in the image processing system shown in Figure 1.
Fig. 5 is a side view of representing that schematically the major part as the image processing system of second embodiment of the present invention constitutes.
Fig. 6 is a side view of representing that schematically the major part as the image processing system of the 3rd embodiment of the present invention constitutes.
Fig. 7 is the side view that the major part of image processing system shown in Figure 6 is amplified expression.
Fig. 8 is a side view of representing that schematically the major part as the image processing system of the 4th embodiment of the present invention constitutes.
Fig. 9 is a side view of representing that schematically the major part as the image processing system of the 5th embodiment of the present invention constitutes.
Figure 10 is a side view of representing that schematically the major part as the image processing system of the 6th embodiment of the present invention constitutes.
Figure 11 is a side view of representing that schematically the major part as the image processing system of the 7th embodiment of the present invention constitutes.
Figure 12 is a side view of representing that schematically the major part as the image processing system of the 8th embodiment of the present invention constitutes.
Embodiment
Followingly preferred implementation of the present invention is elaborated with reference to accompanying drawing.
Fig. 1 is the cut-open view of schematic representation as the formation of the image processing system 1 of first embodiment of the present invention.Fig. 2 is the cut-open view that the formation of the major part of image processing system shown in Figure 11 (following toner image formation portion 2) is amplified expression.Fig. 3 amplifies the cut-open view of expression with the formation of the major part of image processing system shown in Figure 11 (following secondary transfer printing portion 4, heating part 5 and stop bath spreader portion 6).Fig. 4 is the cut-open view of the formation of schematic representation fixing roller 39.
Image processing system 1 comprises: toner image formation portion 2, intermediate transfer portion 3, secondary transfer printing portion 4, heating part 5, stop bath spreader portion 6 and recording medium supply unit 7.
Toner image formation portion 2 comprises image-generating unit 10y, 10m, 10c, 10b, and it forms the electrostatic latent image corresponding with the image information of shades of colour composition, and this electrostatic latent image is developed, and forms versicolor toner image.Promptly, image-generating unit 10y forms and the yellow corresponding toner image of image information, image-generating unit 10m forms the toner image corresponding with the image information of magenta, image-generating unit 10c forms the toner image corresponding with the image information of cyan, and image-generating unit 10b forms the toner image corresponding with the image information of black.Image-generating unit 10y, 10m, 10c, 10b are from the moving direction (sub scanning direction) of middle transfer belt 21, be that upstream one side of the direction of arrow 29 begins to form a line with said sequence.
Image-generating unit 10y comprises: photosensitive drums 11y, charged roller 12y, light scanning unit 13, developing apparatus 14y, drum clearer 15y.
Photosensitive drums 11y is supported for to drive by drive division (not shown) it is rotated around axis, and it contains: the conductive base of cylindric, cylindric or film sheet (being preferably cylindric); And the photographic layer that on the surface of conductive base, forms.Photosensitive drums 11y can use the device commonly used in this area, for example: comprise the photosensitive drums that reaches diameter 30mm organic photosensitive layer, that be connected with earthing potential (GND) that forms as the aluminum pipe of conductive base on the surface of aluminum pipe.Organic photosensitive layer, lamination contain electric charge and generate the charge generating layers of material and contain the electric charge transport layer of charge transfer matter and form.Organic photosensitive layer also can be to contain the layer that electric charge generates material and charge transfer matter in a layer.The bed thickness of organic photosensitive layer for example is 20 μ m.And, between organic photosensitive layer and photosensitive drums, also undercoat can be set.Further, also protective seam can be set on the surface of organic photosensitive layer.In the present embodiment, photosensitive drums drives with the peripheral speed rotation of 100mm/s in the clockwise direction.
Charged roller 12y makes the surface of photosensitive drums 11y charged with predetermined polarity and current potential.Also can replace charged roller 12y and use such corona charging device of the charged device of brush type, the charged device of charge type, charger unit (scorotron) etc.
Light scanning unit 13 to the surface irradiation of the photosensitive drums 11y that the is in electriferous state laser 13y corresponding with yellow image information, forms and the yellow corresponding electrostatic latent image of image information on the surface of photosensitive drums 11y.The light source of laser 13y uses semiconductor laser etc.
Developing apparatus 14y comprises developer roll 17y, developing blade 18y, toner storage appearance 19y and agitating roller 20a, 20b.Developer roll 17y with the surperficial crimping of photosensitive drums 11y, wraps not shown fixed magnetic pole and can rotate driving around axis in being set to, yellow toner 16y is supplied on the electrostatic latent image on photosensitive drums 11y surface.Developing blade 18y is set to the surperficial butt with developer roll 17y, makes the yellow toner layer homogenising (layer restriction) on developer roll 17y surface.Toner storage container 19y stores yellow toner 16y.Agitating roller 20a, 20b are set in the mutual crimping in the inside of toner storage container 19y and can rotate driving around axis.Mix roller 20a, with the surperficial crimping of developer roll 17y, and to the yellow toner 16y of developer roll 17y surface supply.Developer roll 17y, with the development clamping part of photosensitive drums 11y crimping (contact) in, rotation drives on the direction identical with the rotation driving direction of photosensitive drums 11y.Therefore, the rotation driving direction around axis becomes in the other direction.In the present embodiment, the peripheral speed of developer roll 17y is 1.5 times of photosensitive drums 11y, is 150mm/s.Yellow toner 16y among the toner storage container 19y, supply to developer roll 17y surface by agitating roller 20a, 20b, make by developing blade 18y layer thickness homogenized after, utilize potential difference (PD) etc., roughly optionally supply on the electrostatic latent image on photosensitive drums 11y surface, form and the yellow corresponding toner image of image information.And, in the present embodiment, use the two-component developing agent of yellow toner 16y and magnetic carrier mixing.And in the present embodiment, so that photosensitive drums 11y and developer roll 17y, developer roll 17y and developing blade 18y, and developer roll 17y and agitating roller 20a respectively the mode of crimping be provided with, but be not limited to this, also can be set to have small interval respectively and separate.
15y is as described below for the drum clearer, after the yellow toner image intermediate transfer with photosensitive drums 11y surface arrives intermediate transfer belt 21, removes, reclaims the yellow toner that remains in this surface.
According to image-generating unit 10y, photosensitive drums 11y is driven around its axis rotation, and at first make the surface of photosensitive drums 11y for example charged-600V by charged roller 12y.Then, shine the flashlight 13y corresponding from light scanning unit 13, form the electrostatic latent image of the exposure current potential-70V corresponding with yellow image information with yellow image information to the surface of the photosensitive drums 11y that is in electriferous state.Then, touch the surface of photosensitive drums 11y at the yellow toner layer of developer roll 17y surface bears.Apply-DC voltage of 240V as the development current potential among the developer roll 17y, by potential difference (PD), yellow toner 16y is attached to electrostatic latent image and develops, and forms yellow toner image on the surface of photosensitive drums 11y.This yellow toner image is as described below, and with the surperficial crimping of photosensitive drums 11y, and intermediate transfer is on the intermediate transfer belt 21 that drives on the direction of arrow 29.The yellow toner 16y that remains in the surface of photosensitive drums 11y is removed, is reclaimed by drum clearer 15y.Carry out same yellow toner image afterwards repeatedly and make action.
Image-generating unit 10m, 10c, 10b, except using magenta toner 16m, cyan toner 16c or black toner 16b respectively, has similar structure with image-generating unit 10y, therefore be marked with same with reference to label, and indicate " m " of expression magenta, " c " or " b " of expression black of expression cyan at each end with reference to label, omit its explanation.
And versicolor toner 16y, 16m, 16c, 16b contain binder resin, colorant and release agent, except the kind difference of colorant, have similar composition.As binder resin, so long as get final product by following stop bath 9 resins softening or that expand, have no particular limits, for example comprise: the homopolymer of polystyrene, styrene derivative replacement, styrene copolymerized compound, Polyvinylchloride, polyvinyl acetate (PVA), tygon, polypropylene, polyester, polycarbamate etc.Binder resin can be used alone, and perhaps uses two or more simultaneously.In this binder resin, use as color toner, from keeping quality, permanance, and the softening or control equal angles that expands of following stop bath 9, preferred softening point is that 100～150 ℃, glass transition temperature are 50～80 ℃ binder resin, special preferred polyester.Polyester is easy to softening by the organic solvent that is easy to obtain and/or expands, and becomes transparent under softening or swelling state.Therefore, when the polychrome toner image that has overlapped yellow, magenta, cyan and black toner image is passed through stop bath 9 photographic fixing,, therefore mix to obtain sufficient colour developing by losing lustre owing to the polyester self as binder resin is transparent.And, compare the high resin of use softening point and hardness with the employed binder resin of toner that hot photographic fixing is used, be the high resin of the big hardness of molecular weight, also can pass through stop bath 9 photographic fixing.If use softening point and the high resin of hardness, the deterioration that the load in the time of then can preventing to develop causes, can obtain long-time in image quality can deterioration image.
Can use in the definition technique of existing electrofax mode employed toner with color and dyestuff as colorant, but in order to prevent the infiltration of stop bath 9, preferably use the pigment that is not dissolved in stop bath 9, and dyestuff such as aniline black byestuffs and being not suitable for.Concrete example as pigment for example comprises: organic class pigment such as AZO pigments, benzimidazolone pigment, quinacridone pigment, phthalocyanine color, isoindolone pigment, isoindoline pigment, triazine dioxin pigment, anthraquinone pigment, perylene pigment, perynone pigment, thioindigo color, quinophthalone pigment and metal complex pigment; Mineral-type pigment such as carbon black, titanium dioxide, chrome vermillion, chrome yellow, titan yellow, chromium oxide, Berlin blue; Metal powders such as aluminium powder etc.Pigment can be used alone, or uses two or more simultaneously.
Can use various waxes as release agent.Wax is so long as can be had no particular limits by getting final product that stop bath 9 softens or expands.The concrete example of wax for example comprises Tissuemat E, polypropylene wax, paraffin etc.
Toner can also contain general toner such as charged controlling agent, mobile improver, photographic fixing promoter, conductive agent with a kind of of adjuvant or two or more except containing binder resin, colorant and release agent.
The volume average particle size of toner has no particular limits, but is preferably 2～7 μ m.When using this small particle diameter toner, it is big that the toner surface area under the unit area becomes, and increases with the contact area of stop bath 9, and becoming is easy to photographic fixing.So, can reduce the use amount of stop bath 9, and toner image can be implemented at short notice to the photographic fixing and the drying after the photographic fixing of recording medium 8.And, when the volume average particle size appropriateness of toner diminishes, the lining rate of recording medium 8 is improved, therefore can realize the high image qualityization under the low adhesion amount and the minimizing of toner consumption amount, and can further reduce the consumption of stop bath 9.
When the volume average particle size of toner is lower than 2 μ m, the flowability of toner descends, when carrying out developing operation, and the supply of toner, stirring and chargedly become insufficient, produce the increase of toner quantity not sufficient, opposite polarity toner etc., might can't obtain images with high image quality.On the other hand, when volume average particle size surpassed 7 μ m, the toner particle change that is difficult to softening and/or the big particle diameter that expands till the toner particle center was many, therefore the fixation performance of image on recording medium 8 descends, image colour developing variation, particularly when the OHP paper is arrived in photographic fixing, the image deepening.
There is no particular limitation for the softening point of toner self and glass transition temperature, is 50～80 ℃ but preferred softening point is 100～130 ℃, glass transition temperature.The toner that this softening point is high helps improving when developing the permanance at load, but fully photographic fixing and colour developing under hot photographic fixing mode.Owing to be to make toner softening and/or expand, so photographic fixing and colour developing be sufficient with utilizing stop bath 9 chemical, can obtain high-grade image but in the present invention.And when toner contained a plurality of binder resin, toner had a plurality of softening points or a plurality of glass transition temperature sometimes.In this case, the softening point of toner or glass transition temperature are represented the softening point minimum among a plurality of or the temperature of glass transition temperature.
Toner can be made according to known method.For example, comprise the method that release agent, colorant etc. is distributed in the binder resin and pulverizes; Release agent, colorant etc. is distributed in the monomer solution of binder resin, makes the method etc. of the monomer polymerization of binder resin afterwards.In any one method, in order to increase the surface area of toner, the shape adjustments that preferably makes toner is aspheric unsetting.So,, therefore can reduce the use amount of stop bath 9, can implement the photographic fixing and the drying of toner image at short notice because toner is easy to touch stop bath 9.
Versicolor toner 16y, 16m, 16c, 16b can directly use as monocomponent toner, also can mix as two-component developing agent with carrier and use.
The versicolor toner 16y, 16m, 16c, the 16b that use in the present embodiment have same structure as follows except pigment.This toner, glass transition temperature are that 60 ℃, softening point are that 120 ℃, volume average particle size are 6 μ m, are electronegative insulativity non-magnetic toners.In order to utilize this toner to obtain to be 1.4 image color, the 5g/m of needs with the reflection density measured value that X-Rite corporate system 310 is measured
2The toner amount.It is that 60 ℃ and softening point are that 120 ℃ polyester (binder resin), glass transition temperature is the low-molecular polyethylene wax (release agent) and the versicolor pigment of 70 ℃ of 50 ℃ and softening points that this toner contains glass transition temperature, the wax amount is 7 weight % of toner total amount, the pigment amount is 12 weight % of toner total amount, and other parts are the polyester of binder resin.The low-molecular polyethylene wax that contains in this toner is to compare glass transition temperature and the low wax of softening point with the polyester of binder resin.If use this wax, even under the low temperature of the glass transition temperature of specific adhesion resin, the adhesion of the adhesion between the toner, toner and intermediate transfer belt 21 or recording medium 8 increases, therefore when the stop bath of smearing as liquid material 9, the generation that can suppress that toner that stop bath 9 causes flows, condenses etc.Further, when the wax in the toner was softening, stop bath was easy to be penetrated into toner inside from the place that has wax.Therefore, when smearing stop bath 9, the whole softening and/or expansion of toner at short notice can obtain sufficient fixing strength when being transferred to recording medium 8, and the colour developing after toner image is overlapping also becomes abundant.
Intermediate transfer portion 3 has: intermediate transfer belt 21; Intermediate transfer rollers 22y, 22m, 22c, 22b; Backing roll 25,26,27; With band clearer 28.
The toner image loading end 21a of intermediate transfer belt 21 successively with photosensitive drums 11y, 11m, 11c, 11b crimping.The position of intermediate transfer belt 21 and photosensitive drums 11y, 11m, 11c, 11b crimping is the intermediate transfer position of the toner image of each color component.Intermediate transfer rollers 22y, 22m, 22c, 22b are configured in across intermediate transfer belt 21 and photosensitive drums 11y, 11m, position that 11c, 11b are relative.
For the toner image that the surface of photosensitive drums 11y, 11m, 11c, 11b is formed is transferred on the intermediate transfer belt 21, by constant voltage control to middle transfer roll 22y, 22m, 22c, 22b applies and the charged opposite polarity intermediate transfer bias voltage of toner.So, the toner image of the yellow of photosensitive drums 11y, 11m, the last formation of 11c, 11b, magenta, cyan and black shades of colour composition on the superimposed successively toner image loading end 21a that is transferred to intermediate transfer belt 21, forms the polychrome toner image.But when a part of image information in an input yellow, magenta, cyan and the black content, among image-generating unit 10y, 10m, 10c, the 10b, only in the image-generating unit corresponding, form toner image with the color component of the image information of importing.
Backing roll 25,26,27 for example uses the aluminum cylinder of diameter 30mm, wall thickness 1mm.With the backing roll 26 of following secondary transfer roller 30 crimping, electrical ground via intermediate transfer belt 21.
Band clearer 28 is the toner image on the toner image loading end 21a of intermediate transfer belt 21 is transferred to recording medium 8 in following secondary transfer printing portion 4 after, removes the parts that remain in the toner on the toner image loading end 21a.Band clearer 28 has cleaning balde 28a and toner storage container 28b.Cleaning balde 28a is set to via intermediate transfer belt 21 relatively with backing roll 21, and the residue toner got on the toner image loading end 21a etc. is scraped in and the toner image loading end 21a crimping by pressurization part (not shown) and intermediate transfer belt 21.Toner storage container 28b, the storage scraper plate 28a that is cleaned scrapes the toner got etc.Cleaning balde 28a for example can use the scraper plate that is made of rubber-like elastomeric material (for example urethane rubber) etc.
According to intermediate transfer portion 3,,, form toner image in the overlapping transfer printing in precalculated position of the toner image loading end 21a of intermediate transfer belt 21 with the versicolor toner image of photoreceptor 11y, 11m, the last formation of 11c, 11b.This toner image is transferred to recording medium 8 in secondary transfer printing portion 4 after, the residual toner on the toner image loading end 21a, skew toner, paper powder etc. are removed by band clearer 28, and once more toner image are transferred to toner image loading end 21a.
Secondary transfer printing portion 4 comprises secondary transfer roller 30, and this secondary transfer roller 30 is set to via intermediate transfer belt 21 with backing roll 26 crimping and can rotate driving around axis.Secondary transfer roller 30 is for example used the roller shape parts that the urethane rubber layer of thick 4mm is set on the periphery of the plug of diameter 10mm.In the urethane rubber layer,, be combined with conductive agents such as carbon in order to give electric conductivity.And secondary transfer roller 30 is for example with the line pressure of 1N/cm, promptly on line pressure of effect is pressed against on the backing roll 26.When the toner image on the intermediate transfer belt 21 is transferred to recording medium 8 by secondary transfer roller 30, for example apply on the plug of secondary transfer roller 30+voltage of 1kV.
According to secondary transfer printing portion 4, the intermediate transfer belt 21 of carrying polychrome toner image, synchronous with transmission to the pressure contact portion of secondary transfer roller 30 and backing roll 26, transmit recording medium 8 from following recording medium supply unit 7, the polychrome toner image on the intermediate transfer belt 21 is by pushing the surface that is transferred to recording medium 8.Transfer printing the recording medium 8 of polychrome toner image be sent to heating part 5.
Heating part 5 has: with transfer printing the recording medium 8 of polychrome toner image be sent to the travelling belt 31 of following stop bath spreader portion 6; Warm-up mill 32; Jockey pulley 34; With temperature sensor 35.
Travelling belt 31 is the endless belts that are erected between warm-up mill 32 and the jockey pulley 34 with the transfer path that forms ring-type, and rotation drives on the direction of arrow 46.Travelling belt 31 for example can use sneaking at least one surface of pi film that conductive agent gives the thick 100 μ m of electric conductivity material of the superficial layer of the thick 10 μ m that are made of PTFE is set.
Warm-up mill 32, be set to can by drive division (not shown) drive make its around axis rotate, and within it portion have the roller shape parts of heating part 33, have function that travelling belt 31 is heated, reach function as driven roller.Warm-up mill 32 can use the hollow roller that for example is made of metals such as aluminium.Halogen lamp LED etc. is used in heating part 33.By the effect of this warm-up mill 32, the toner image of carrying on the surface of travelling belt 31 and then travelling belt 31 preferably is heated to the low slightly temperature of glass transition temperature than the toner that constitutes this toner image.For example, when the glass transition temperature of toner is 60 ℃, be preferably 55～58 ℃, preferred especially 56 ℃.And for toner image being heated to 55～58 ℃, preferably the surface temperature with travelling belt 31 remains on 70 ℃.
Jockey pulley 34 applies predetermined tension force to travelling belt 31, so that travelling belt 31 is not loose.Jockey pulley 34 for example uses the roller shape parts that are made of metallic axis body and the coating that forms on the surface of metallic axis body.And, but the parts that also only constitute by the metallic axis body.The material of metallic axis body for example uses stainless steel, and lining material for example uses fluorocarbon rubber.And, also metal hollow roller.
In the present embodiment, remain on 70 ℃, can be set at the low temperature of glass transition temperature (60 ℃) being placed on the temperature of the toner image on the recording medium 8 of travelling belt 31 than toner by surface temperature with travelling belt 31.But be not limited thereto, for example also the surface temperature of travelling belt 31 can be remained on 80 ℃, make the temperature of the toner image on the recording medium 8 be higher than glass transition temperature (60 ℃).So, smear stop bath 9 before, toner is softening to a certain extent, between the toner and the adhesion of toner and recording medium 8 increase, the toner that stop bath 9 causes in the time of can preventing to smear stop bath moves, condenses etc.And, also the surface temperature of travelling belt 31 can be remained on 140 ℃, make softening point (120 ℃) height of the temperature of the toner image on the recording medium 8 than toner.So, toner can be fully softening, between the toner and the adhesion of toner and recording medium 8 further increase, can prevent that stop bath 9 caused when stop bath 9 adhered to toner from moving, condensing etc.And only being to use glass transition temperature at this example of enumerating is that 60 ℃ or softening point are the situation of 120 ℃ toner, can be according to the surface temperature of the glass transition temperature or the softening point appropriate change travelling belt 31 of toner.
According to heating part 5, the recording medium 8 that carries the toner image of not photographic fixing is placed on the travelling belt 31, accepts heating by warm-up mill 32, and the direction to arrow 46 transmits simultaneously, is sent to stop bath spreader portion 6.
In the present embodiment, used the warm-up mill 32 that is built-in with well heater 33 as heating part 5, but be not limited thereto, can use the heating part of roller mode, fixing Contact Heating modes such as tabular mode, the heating part that also can use noncontact type of heating such as infrared heater.
Stop bath spreader portion 6 has stop bath supply unit 36, fixing roller 39 and backer roll 40.Stop bath supply unit 36 is supplied with stop bath 9 to the surface of fixing roller 39.Fixing roller 39 is set to be driven by drive division (not shown) and makes its direction rotation along arrow 54, forms the zone to the toner image of recording medium 8 at least and smears stop bath.Backer roll 40 with fixing roller 39 crimping and be driven in the rotation of fixing roller 39, is set to rotate driving on the direction of arrow 55.
Stop bath supply unit 36 has photographic fixing liquid bath 48, stop bath donor rollers 49, restrict rollers 51, removes scraper plate 53, stop bath holding tank 37 and supply pipe 38.Photographic fixing liquid bath 48 has towards the peristome of fixing roller 39, storage stop bath 9.Stop bath donor rollers 49 is set to: a part is outwards outstanding and fixing roller 39 crimping from the peristome of photographic fixing liquid bath 48, and a part is immersed in the stop bath of storing in the photographic fixing liquid bath 48 9 and can be driven by drive division (not shown) and makes its direction rotation along arrow 50.Restrict rollers 51 is set to the surperficial crimping of stop bath donor rollers 49 and can be driven by drive division (not shown) make its direction rotation along arrow 52, and its an amount of restriction is attached to the stop bath 9 on the surface of stop bath donor rollers 49.Removing scraper plate 53, is to be set to the plate-shaped member that an end is fixed on the surperficial crimping of photographic fixing liquid bath 48 and the other end and restrict rollers 51, removes the stop bath 9 on restrict rollers 51 surfaces.Stop bath holding tank 37 storage stop baths 9.Supply pipe 38 is sent to photographic fixing liquid bath 48 with the stop bath in the stop bath holding tank 37.And stop bath donor rollers 49 and restrict rollers 51 are for example driven by single gear string, with constant peripheral speed ratio rotation.
In the photographic fixing liquid bath 48, according to the consumption situation of stop bath 9, replenish supply stop bath 9 from stop bath holding tank 37, so that the maintenance of the liquid level of the stop bath 9 in the photographic fixing liquid bath 48 is constant via supply pipe 38.
Photographic fixing donor rollers 49 is used the roller shape parts of the elastic layer that comprises plug and form on the surface of plug.As the material that constitutes elastic layer, the compatibility of preferred silicone rubber, fluorocarbon rubber, urethane rubber etc. and the solvent composition of following stop bath resilient material high, contact after expansion with stop bath 9.Wherein, silicone rubber and fluorocarbon rubber surface energy are less, are difficult to adhere to toner, therefore preferred the use.The sense of rotation of stop bath donor rollers 49 with the pressure contact portion of fixing roller 39 in, be the direction identical with fixing roller 39.And, the peripheral speed of stop bath donor rollers 49 be set with the peripheral speed of fixing roller 39 about equally.In the present embodiment, stop bath donor rollers 49 can use external diameter to have the roller of the silicone rubber layer of thick 3mm and hardness 20 degree (JIS-A) as 20mm, surface.And in the present embodiment, the pressing force of 49 pairs of fixing rollers 39 of stop bath donor rollers is set to the line pressure of 1N/cm.
Restrict rollers 51 is for example used the metallic roller.In the present embodiment, be the stainless steel roller of external diameter 12mm.And in the present embodiment, restrict rollers 51, with 1/2 peripheral speed of the peripheral speed of stop bath donor rollers 49, with the pressure contact portion of stop bath donor rollers 49, move on the direction opposite with the moving direction on the surface of stop bath donor rollers 49 on its surface, promptly along the direction rotation of arrow 52.
Remove scraper plate 53 and for example use metal plate-shaped member.In the present embodiment, use the plate of the stainless steel of thick 50 μ m.Remove the top of scraper plate 53 and the surperficial crimping of restrict rollers 51, remove stop bath 9 attached to restrict rollers 51 surfaces.
According to stop bath supply unit 36, at first, stop bath donor rollers 49 is rotated in the stop bath 9 of photographic fixing liquid bath 48, and stop bath 9 is attached to the surface of stop bath donor rollers 49.This stop bath 9 forms the thin layer with constant thickness by restrict rollers 51.In the present embodiment, the surface of stop bath donor rollers 49 is with about 16g/m
2Ratio form the photographic fixing liquid layer.This photographic fixing liquid layer is transferred on the fixing roller 39 at the pressure contact portion of stop bath donor rollers 49 and fixing roller 39.At this moment, the stop bath 9 on the stop bath donor rollers 49 roughly 1/2 transfers on the fixing roller 39.Therefore, in the present embodiment, on fixing roller 39 with 8g/m
2Ratio form the photographic fixing liquid layer.This photographic fixing liquid layer carrying toner image contacts with the toner image loading end of the recording medium 8 that transmits under heated condition, and the toner image that stop bath 9 is applied at least recording medium 8 forms the zone.
Fixing roller 39 uses on the surface of metal plug 39a lamination elastic layer 39b and superficial layer 39c successively and the roller shape parts that form.Elastic layer 39b can use known resilient material, but preference such as EPDM rubber, butyl rubber, nitrile rubber, chloroprene rubber, styrene butadiene rubbers etc., can not expand and be suitable for the rubber-like of roll shape because of stop bath 9.Elastic layer 39b is not by can constituting because of the material that stop bath 9 expands, thereby the external diameter that can prevent fixing roller 39 changes, and then can prevent the variation of the transfer rate of recording medium 8.This rubber can be used alone, and also can use two or more simultaneously.Superficial layer 39c for example comprises polytetrafluoroethylene (PTFE), tetrafluoroethylene/perfluoro alkyl vinyl ether co-polymer (PFA), tetrafluoroethylene/hexafluoropropylene copolymer (FEP), tetrafluoroethylene/ethylene multipolymer (ETFE), Kynoar (PVDF), polychlorotrifluoroethylene fluorine resins such as (PCTFE).Fluorine resin can be used alone, and also can use two or more simultaneously.Therefore this fluorine resin can make stop bath 9 keep as thin layer on the surface of fixing roller 39 owing to the solvent composition with the stop bath 9 with following composition has higher compatibility.So,, can make stop bath 9 be applied to fixing roller 39 surfaces in a big way, therefore can reduce the consumption of stop bath 9, and can prevent that unnecessary stop bath 9 from washing away the toner of not photographic fixing, causes the image disorder by a spot of use.Consequently, the toner that can prevent to be attached to fixing roller 39 in a long time is attached to the generation of this shift phenomenon of imaging surface, can obtain to keep in long-time stable image than high image quality with a spot of stop bath 9.In above-mentioned fluorine resin, preferred PTFE.Among the PTFE, all fluorine atoms all are connected with the marriage chain of the carbon atom that constitutes main chain, therefore toner is difficult to adhere to, and is higher with the compatibility of the solvent composition of stop bath 9, for the consumption that reduces stop bath 9 and to prevent that toner is attached to fixing roller 39 very effective.
In the present embodiment, fixing roller 39 uses the roller of the external diameter 30mm of following formation: on the surface of plug 39a, elastic layer 39b, and the top layer 39c of the thick 80 μ m that are made of PFA of the thick 3mm that the EPDM rubber by hardness 20 degree (JIS-A) constitutes is set.
In the present embodiment, for stop bath 9 is applied to recording medium 8, when contacting with recording medium 8, use smears the spreader portion of the way of contact of stop bath 9, but be not limited thereto, also can use the spreader portion of noncontact modes such as ultrasonic transducer, small nozzle array, this small nozzle array is used for spraying, the ink gun by the droplet of generations such as air-flow.
Stop bath 9 is to make the liquid material that toner is softening and/or expand.As the preferred concrete example of stop bath 9, comprise the solvent composition that makes toner have the organic compound (hereinafter referred to as " toner photographic fixing organic compound ") of softening and/or expansion and can make the toner photographic fixing dissolve or disperse with organic compound.Photographic fixing for example comprises with organic compound as toner: alcohols such as methyl alcohol, ethanol, propyl alcohol, isopropyl alcohol, butanols; Ketones such as acetone, methyl ethyl ketone, methyl butyl ketone, methyl isobutyl ketone and diethyl ketone; Ethers such as methyl ethyl ether, diethyl ether, methyl butyl ether, methyl-isobutyl ether, dimethyl ether; Ester class that forms by alcohols such as carboxylic acidss such as formic acid, acetate, propionic acid, butyric acid and methyl alcohol, ethanol, propyl alcohol etc.Wherein, preferred ethers and ester class, preferred especially ester class.In ethers, preferred especially diethyl ether.Ethyl acetate, methyl acetate, methyl formate, ethyl formate etc. in the ester class, special ethyl acetate.The toner photographic fixing can be used alone with organic compound, also can use two or more simultaneously.The toner photographic fixing has volatility at normal temperatures with organic compound, and has the good effect that toner such as polyester is softening with binder resin and/or expand that makes.
The toner photographic fixing is not particularly limited with the content of organic compound in stop bath 9, can suitably select from bigger scope, but preferably account for 1～50 weight % of stop bath 9 total amounts, further preferably account for 5～50 weight % of stop bath 9 total amounts, especially preferably account for 10～40 weight % of stop bath 9 total amounts.If be lower than 1 weight %, then softening the and/or expansion of toner is insufficient, the danger that has the fixing strength of toner image on recording medium 8 to descend.And, when surpassing 50 weight %, relatively the content of solvent composition reduces, thereby the perviousness of 9 pairs of toner image of stop bath is descended, the only softening and/or expansion in the top layer of toner image, so the fixing strength of toner image on recording medium 8 has the danger of decline.
Solvent composition is so long as solubilized or disperse the toner photographic fixing get final product with the liquid component of organic compound, and there is no particular limitation, but considers the perviousness of toner image etc., preferably hydrogen fluorine ether.Because the surface tension and the viscosity of hydrogen fluorine ether are less, therefore can be penetrated between the toner particle well, in the surface of contact of toner and recording medium 8 etc.Therefore, the toner photographic fixing with organic compound with hydrogen fluorine ether be sent between the toner particle, and the surface of contact of toner and recording medium 8 etc. locate, can make toner instantaneous softening and/or expand.And the evaporation latent heat of hydrogen fluorine ether is less, so but at room temperature also volatilize in the short time, the drying of recording medium 8 is quickened.
Hydrogen fluorine ether can use material known, for example comprises: methyl nine fluorine butyl ethers, methyl nine fluorine isobutyl ether (C
3F
9OCH
3), ethyl nine fluorine butyl ethers, ethyl nine fluorine isobutyl ether (C
3F
9OC
2H
5), 1,1,2,2-tetrafluoro ethyl and 2,2,2-trifluoroethyl ether (CHF
2CF
2OCH
2CF
3) etc.Hydrogen fluorine ether can be used alone, and also can use two or more simultaneously.
There is no particular limitation for the content of hydrogen fluorine ether in stop bath 9, suitably select in the scope that can be bigger, but preferably account for 50～99 weight % of stop bath 9 total amounts, further preferably account for 50～95 weight % of stop bath 9 total amounts, especially preferably account for 60～90 weight % of stop bath 9 total amounts.If be lower than 50 weight %, then the perviousness of 9 pairs of toner image of stop bath descends, and only constitutes the softening and/or expansion of toner on toner image top layer, and toner has the danger of decline to the fixing strength of recording medium 8.On the other hand, when surpassing 99 weight %, toner photographic fixing relatively tails off with the content of organic compound, and stop bath is to softening, the expansion decline of toner, the inadequate danger that becomes of the fixing strength of toner image on recording medium 8.
Stop bath 9 except the toner photographic fixing with organic compound and the solvent composition, also can add for example release agent, surfactant etc.
Release agent has for example following effect.That is, when smearing stop bath 9, constitute the softening and/or expansion of toner of toner image by the toner image of fixing roller 39 on recording medium 8.Softening and/or expand toner image being in the semi-molten state on the recording medium 8 till solidifying, has cohesive.Therefore, the toner image on might occurrence record medium 8 not photographic fixing is attached to the shift phenomenon of fixing roller 39 1 sides to recording medium 8.When shift phenomenon takes place, can't avoid tangible image deterioration.After adding release agent, can relax the cohesive of toner image, even the toner image under the semi-molten state also can further reduce the possibility that shift phenomenon takes place to stop bath 9.Can use silicone oil, ester oil, liquid pfpe, bobbin oil, machine oil, cylinder wet goods as release agent.Wherein, preferably use thermotolerance and chemical stability excellence, demoulding effect and suppress the high silicone oil of toner image cohesive effect, and preferred viscosities 0.0001～0.0005m
2The silicone oil of/s (100～500cSt, 25 ℃).This silicone oil with range of viscosities is on sale in market, for example comprises trade name KF96 that SHIN-ETSU HANTOTAI's chemical industry (strain) is made etc.The content of release agent in stop bath 9 is not particularly limited, and can suitably select in a big way, but preferably account for 5～20 weight % of stop bath 9 total amounts, further preferably accounts for 10～15 weight % of stop bath 9 total amounts.By in this scope, adding release agent, can further suppress the generation of shift phenomenon, obtain images with high image quality.If the content of release agent below 5 weight %, then can't be given full play to the effect of adding release agent, can't further reduce shift phenomenon.On the other hand when surpassing 20 weight %, can't fully carry out softening, fusion, and the drying that stop bath 9 occurs needs the tendency of spended time as the toner of the formation toner image of the original effect of stop bath 9.
Surfactant has following effect: the effect that improves the wettability of 9 pairs of toners of stop bath; Make the toner photographic fixing be distributed to effect in the solvent composition with organic compound; When the solvent composition of stop bath 9 is a water-based and when adding release agent as oil content, make release agent be distributed to effect in the solvent.Can use material known as surfactant, for example comprise: anionic surfactants such as derivative of fatty acid sulfuric acid, phosphate, cationic surfactant such as quaternary ammonium salt, heterocyclic amine, zwitterionic surfactant such as amino-acid ester, amino acid, nonionic surfactant, polyoxyalkylene alkyl, polyoxyethylene alkyl amine etc.
According to fixation unit 6, the recording medium 8 that is placed on the travelling belt 31 and under heated condition, transmits, carry not photographic fixing toner image, by the photographic fixing clamping part between fixing roller 39 and the backer roll 40 time, via fixing roller 39 toner image that stop bath 39 is applied to recording medium 8 is at least formed the zone from stop bath supply unit 36, constitute the softening and/or expansion of toner of toner image, and recording medium 8 is by backer roll 40 pressurizations, therefore toner image on recording medium 8, is formed image by photographic fixing.Formed record images medium 8, be discharged to by exit roller 56a, 56b on row's paper disc 41 of the outside that is arranged on image processing system 1.
Recording medium supply unit 7 has cartridge for recording medium 42, pick-up roller 43 and a pair of registration roller 44a, 44b.Cartridge for recording medium 42 stored record media 8.Pick-up roller 43 is sent to transfer path P with recording medium 8 one by one.A pair of registration roller 44a, 44b, synchronous with the toner image on the intermediate transfer belt 21 to the transmission of the pressure contact portion of secondary transfer roller 30 and backing roll 26, recording medium 8 is sent to the pressure contact portion of secondary transfer roller 30 and backing roll 26.
According to recording medium supply unit 7, be stored in the recording medium 8 in the cartridge for recording medium 42, be sent to transfer path P one by one by pick-up roller 43, and be sent to the pressure contact portion of secondary transfer roller 30 and backing roll 26 by registration roller 44a, 44b.
According to image processing system 1, form portion 2 by toner image and be formed on polychrome toner image on the intermediate transfer belt 21, pressure contact portion at secondary transfer roller 30 and backing roll 26, be transferred on the recording medium 8, smear stop bath from the polychrome toner image contact of 39 pairs of recording mediums 8 of fixing roller, the photographic fixing of polychrome toner image forms image on recording medium 8.
According to present embodiment, owing to be to heat before smearing stop bath 9, therefore do not contain stop bath 9, so less as the thermal capacity of the recording medium 8 of heated object at recording medium 8 to the carrying toner image.Therefore, can make recording medium 8 with less heat so that the temperature of toner image rises.And, when smearing stop bath 9, toner image and recording medium 8 are in heated condition, therefore the stop bath of being smeared 9 spreads rapidly, is penetrated in the toner image, toner softening and/or expand instantaneous and produce on a large scale can prevent flowing, condensing of the uncertain image that causes because of smearing of stop bath 9.Further, the liquid temperature of the stop bath 9 that contacts with toner image also rises, and has sufficient fixing strength at short notice.Further, because the remaining stop bath 9 after the softening and/or expansion of toner is volatilizable at short notice, so the drying of recording medium is also very fast.Because these advantages, can improve as the output number under the unit interval of image processing system 1 is handling capacity.
Fig. 5 is a side view of representing that schematically the major part as the image processing system 60 of second embodiment of the present invention constitutes.Image processing system 60, similar with image processing system 1, omit diagram and explanation for part with same structure.And, in part shown in Figure 5, be marked with equally for the part of correspondence with reference to label, and omit its explanation.
Image processing system 60 is characterised in that, do not use the backer roll 40 in the image processing system 1, in heating part 61, to set up of two rollers of travelling belt 31 as warm-up mill 32, and make warm-up mill 32 and fixing roller 39 via travelling belt 31 crimping, warm-up mill 32 is also worked as backer roll, and other structures are the same with image processing system 1.
Promptly, image processing system 60 has: toner image formation portion 2 (only illustrating photosensitive drums 11y, 11m), intermediate transfer portion 3 (only illustrating intermediate transfer rollers 22y, 22m, intermediate transfer belt 21 and backing roll 26,27), secondary transfer printing portion 4, heating part 61, stop bath spreader portion 6c and recording medium supply unit (not shown).
Heating part 61 has travelling belt 31, driven roller 34a, warm-up mill 32 and temperature sensor 35.Travelling belt 31 is erected between driven roller 34a and the warm-up mill 32, and drives along the direction rotation of arrow 46.Driven roller 34a drives travelling belt 31.32 pairs of travelling belts 31 of warm-up mill and the recording medium 8 that is placed on it heat.Temperature sensor 35 detects the surface temperature of warm-up mill 32.
Travelling belt 31 is in by warm-up mill 32 heated state, and therefore the recording medium 8 of the toner image that transmits, carry not photographic fixing being placed on it heats.
Driven roller 34a is supported for rotatable driving by not shown drive division, by the driving of these arrow 58 directions, travelling belt 31 is driven along the direction rotation of arrow 46.
Warm-up mill 32, via travelling belt 31 and fixing roller 39 crimping, recording medium 8 from the inboard of this not photographic fixing toner image loading end to the pressure contact portion that is sent to warm-up mill 32 and fixing roller 39 heats, and interacts with fixing roller 39, promotes the photographic fixing of toner image on recording medium 8.The surface temperature of warm-up mill 32 (heating-up temperature) is not particularly limited, as long as suitably decisions such as the glass transition temperature of the toner that consideration is used, softening points.In the present embodiment, because the use glass transition temperature is 60 ℃ a toner, therefore the surface temperature of setting warm-up mill 32 is 70 ℃, and the temperature that contacts beginning portion under the pressure contact portion of warm-up mill 32 and fixing roller 39 is set lowlyer slightly than 60 ℃ (glass transition temperatures of toner).And in the present embodiment, warm-up mill 32 also has as the function that applies the jockey pulley of predetermined tension to travelling belt 31.
In the present embodiment, the surface temperature of warm-up mill 32 is set at 70 ℃, but is not limited thereto.For example, the surface temperature that can make warm-up mill 32 is 80 ℃, sets the temperature that contacts beginning portion in the pressure contact portion of warm-up mill 32 and fixing roller 39 than glass transition temperature (60 ℃) height of toner.So, toner is softening before smearing stop bath 9, and the adhesion that reaches between the toner between toner and the recording medium 8 increases, and can prevent that the toner that stop bath 9 caused when stop bath 9 was smeared from moving, condensing.
In the present embodiment, the surface temperature that also can make warm-up mill 32 is 140 ℃, sets the temperature that contacts beginning portion in the pressure contact portion of warm-up mill 32 and fixing roller 39 than glass softening point (120 ℃) height of toner.So, toner is fully softening before smearing stop bath 9, and the adhesion that reaches between the toner between toner and the recording medium 8 increases, and can prevent that the toner that stop bath 9 caused when stop bath 9 was smeared from moving, condensing.
And, in the present embodiment, the superficial layer 39c of fixing roller 39 uses fluorine resin, the solvent composition of stop bath 9 uses hydrogen fluorine ether, but be not limited to this combination, so long as the combination that can make the thin layer of stop bath 9 be applied to the solvent composition of superficial layer 39c toner image, fixing roller 39 and stop bath 9 equably gets final product.
According to heating part 61, the recording medium 8 of carrying toner image is placed on the travelling belt 31, under heating, is sent to the pressure contact portion of warm-up mill 32 and fixing roller 39.In this pressure contact portion, recording medium 8 forms the zone to toner image and smears stop bath 9, and accepts the heating undertaken by warm-up mill 32.So, the toner image photographic fixing forms image on recording medium 8.Formed record images medium 8 is discharged to image processing system 60 by exit roller 56a, 56b outside.
Stop bath spreader portion 6c compares with the stop bath spreader portion 6 of image processing system 1, except backer roll 40 changes to warm-up mill 32, has same structure.The effect that changes to warm-up mill 32 as mentioned above.
By adopting such structure, be used for replenishing the heat that the temperature of the toner that causes because of smearing of stop bath 9 and recording medium 8 descends, be supplied to smearing simultaneously of stop bath 9.Consequently, the temperature of smearing toner, recording medium 8 and stop bath 9 behind the stop bath 9 uprises, and the diffusion of stop bath 9, infiltration accelerate, and the softening and/or instantaneous generation on a large scale of expanding of toner can obtain sufficient fixing strength at short notice.Further, the temperature of the stop bath 9 after the coating rises, so stop bath 9 can be dry at short notice.By these advantages, can further improve that the output number under the unit interval is a handling capacity in the image processing system.
Fig. 6 is a side view of representing that schematically the major part as the image processing system 62 of the 3rd embodiment of the present invention constitutes.Fig. 7 is the cut-open view that the major part of image processing system shown in Figure 6 62 is amplified expression.
And image processing system 62 is characterised in that, is heated and smears the toner image of stop bath 9a on intermediate transfer belt 66, carries out transfer printing and photographic fixing simultaneously by transfer-fixing portion 64 on recording medium 8.
That is, image processing system 62 has: toner image formation portion 2 (only illustrating photosensitive drums 11y, 11m, 11c, 11b), intermediate transfer portion 63, stop bath spreader portion 6a, transfer-fixing portion 64, transport unit 65, recording medium supply unit 7 (only illustrated position roller 44a, 44b).
Warm-up mill 32a is set to and can rotates driving around axis, sets up intermediate transfer belt 66 and rotation with backing roll 26,27, and has the function to middle transfer belt 66 heating.Warm-up mill 32a has metal cylinder and is arranged on the heating parts such as well heater 33 of this cylinder inside.In the present embodiment, use is at the roller of the internal configurations Halogen lamp LED of the stainless steel tubulation of external diameter 30mm, wall thickness 1mm.
According to intermediate transfer portion 63, will be from the toner image on the overlapping toner image loading end 66a that is transferred to intermediate transfer belt 66 of photosensitive drums 11y, 11m, 11c, 11b, follow the rotation of intermediate transfer belt 66, after heating by warm-up mill 32a and smearing stop bath 9a, be sent to transfer-fixing portion 64 by stop bath spreader portion 6a.
Stop bath spreader portion 6a has: the stop bath supply unit 36a that stop bath is applied to the toner image loading end 66a of intermediate transfer belt 66; Stop bath holding tank (not shown); With stop bath supply pipe (not shown).
Stop bath supply unit 36a has photographic fixing liquid bath 48, stop bath donor rollers 49, restrict rollers 51 and removes roller 53a.Photographic fixing liquid bath 48 storage stop bath 9a.Stop bath donor rollers 49a, with intermediate transfer belt 66 crimping, its part is immersed among the stop bath 9a of storage in the photographic fixing liquid bath 48, and is set at the peristome of photographic fixing liquid bath 48, makes its direction rotation along arrow 50 being driven by drive division (not shown).Restrict rollers 51 is set to the surperficial crimping of stop bath donor rollers 49a and can be driven by drive division (not shown) make its direction rotation along arrow 52, and an amount of restriction is attached to the stop bath 9a on the surface of stop bath donor rollers 49a.Remove scraper plate 53a, be set to the surperficial crimping that an end is fixed on photographic fixing liquid bath 48 and the other end and restrict rollers 51, remove the stop bath 9a on restrict rollers 51 surfaces.And stop bath donor rollers 49a and restrict rollers 51 are for example driven by single gear string, with constant peripheral speed ratio rotation.
Photographic fixing liquid bath 48 has the identical structure of fixing bath 48 in the stop bath supply unit 36 with image processing system 1.
Stop bath donor rollers 49a uses the roller of the hydrophilic layer comprise plug, to form on the surface of elastic layer that forms on the mandrel surface and elastic layer.Elastic layer uses silicone rubber, fluorocarbon rubber, urethane rubber etc.Hydrophilic layer is for example used and has been carried out PTFE that water wettability handles etc.Further, the structure of stop bath donor rollers 49a can be that its superficial layer contains and the wettability of following stop bath 9a material preferably at least.This material has no particular limits, and for example comprises metal, hydrophilic resin, water wettability elastomeric materials etc. such as aluminium.By this hydrophilic superficial layer is set, can make stop bath 9a remain thin layer, promptly use a spot of stop bath 9a also can smear on a large scale, therefore can reduce the consumption of stop bath 9a, and the photographic fixing toner causes the image disorder to prevent superfluous stop bath 9a to wash away not.
In the present embodiment, be the elastic layer that is made of the rubber-like silicone rubber to be set on the plug of 12mm to obtain external diameter be the roller of 20mm at diameter, further be provided with roller, use as stop bath donor rollers 49a by the hydrophilic layer of the thick 10 μ m that PTFE constituted that carried out the water wettability processing on the surface of elastic layer.And in the present embodiment, stop bath donor rollers 49a is with line pressure and intermediate transfer belt 66 crimping of 0.5N/cm.Further, stop bath donor rollers 49 is with the speed rotation with respect to the rotational speed of intermediate transfer belt 66 slow 2%.
Restrict rollers 51 has the identical structure of restrict rollers 51 in the stop bath supply unit 36 with image processing system 1.
Remove the plate that scraper plate 53a uses the stainless steel of thick 40 μ m.
Stop bath 9a makes water as solvent composition, and uses the constituent that contains water and toner photographic fixing usefulness organic compound.Wherein, as toner photographic fixing organic compound, in the illustrative material before, can select to use solubilized or be scattered in water.The content of the water among the stop bath 9a is not particularly limited, and preferably accounts for 20 weight % of stop bath 9a total amount or more than it, 20～95 weight % more preferably, and preferred especially 30～90 weight %, remainder is toner photographic fixing organic compound.Among the stop bath 9a,, can add an amount of surfactant in order to improve the toner photographic fixing with the dispersiveness of organic compound in water.As surfactant, for example comprise: anionic surfactants such as senior fatty acid metal salts such as higher alcohol sulfuric acid, sodium oleate, derivative of fatty acid sulfuric acid or phosphate such as laurilsulfate sodium salt; Cationic surfactant such as quaternary ammonium salt or heterocyclic amine; Zwitterionic surfactant such as amino-acid ester or amino acid; Nonionic surfactant, polyoxyalkylene alkyl and polyoxyethylene alkyl amine etc.Further, can add an amount of spreading agent among the stop bath 9a.Spreading agent for example comprises: diglycol, triethylene glycol, polyglycol, monobutyl ether, diethylene glycol monomethyl ether etc.This stop bath 9a can not be penetrated into intermediate transfer belt 66.
According to stop bath supply unit 36a, at first, in the stop bath 9a of photographic fixing liquid bath 48, rotate by stop bath donor rollers 49a, stop bath 9a is attached to the surface of stop bath donor rollers 49a, forms the layer of stop bath 9a.This layer is restricted to the thin layer with constant thickness by restrict rollers 51.This photographic fixing liquid layer at the pressure contact portion of stop bath donor rollers 49a and intermediate transfer belt 66, is transferred on the toner image loading end 66a of intermediate transfer belt 66.At this moment, roughly 1/2 surface of transferring to toner image loading end 66a of the stop bath 9a on the stop bath donor rollers 49a.
According to stop bath spreader portion 6a,, stop bath 9a is applied to is being on the toner image of heated condition on the intermediate transfer belt 66 by intermediate transfer portion 63.Toner image on the intermediate transfer belt 66 is accepted heating and smearing of stop bath and softening and/or expand.
Transfer-fixing portion 64 has backer roll 40, and this backer roll is set to: relative via intermediate transfer belt 66 with the backing roll 26 that is set to drive along the direction rotation of arrow 71, and can drive along the direction rotation of arrow 72.
Backer roll 40 has the identical structure of backer roll 40 in the stop bath spreader portion 6 with image processing system 1.Backer roll 40 is with line pressure and intermediate transfer belt 66 crimping of 5N/cm.And backer roll 40 is not applied voltage.
According to transfer-fixing portion 64, carrying is in the intermediate transfer belt 66 of the toner image of softening and/or swelling state, pressure contact portion to backing roll 26 and backer roll 40 moves, synchronous with it, by not shown recording medium supply unit, recording medium 8 is sent to the pressure contact portion of backing roll 26 and backer roll 40, the toner image bearing part of intermediate transfer belt 66 and recording medium 8 superimposed pushing.Because this toner image is in softening and/or swelling state, therefore be attached to recording medium 8 by pushing.At this moment, when recording medium 8 was stationery, toner image was embedded in the paper fiber securely, fusion between the toner particle meanwhile, and it is level and smooth that the surface of toner image becomes.Consequently, can obtain to have the colour rendering and coloured image surface gloss property, high-quality under mixing of losing lustre of high-quality.In the present embodiment, the surface of intermediate transfer belt 66 is provided with the fluoropolymer resin layer little with the adhesion of toner, so toner image substantially all is transferred to recording medium 8.And intermediate transfer belt 66 has elastic layer below fluoropolymer resin layer, therefore is out of shape along with the concavo-convex of recording medium, so toner image is contacted with the recess of recording medium 8, can obtain uniform transfer printing photographic fixing image.
Transport unit 65 has: be set to and can drive the driven roller 68 that it is rotated around axis by drive division (not shown); Jockey pulley 69; With the travelling belt 70 that sets up and rotate driving by driven roller 68 and jockey pulley 69 as endless belt.According to transport unit 65, in transfer-fixing portion 64, output to the outside of image processing system 62 and transmit in order toner image to be transferred photographic fixing and to have formed record images medium 8.Recording medium 8 by transport unit 65 transmits outputs to the not shown row's paper disc that is arranged on image processing system 62 outsides via exit roller 56a, 56b.
According to image processing system 62, the toner image that is transferred to intermediate transfer belt 66 is accepted smearing of heating and stop bath 9a, become softening and/or swelling state, and transfer-fixing is to recording medium 8.
In the present embodiment, because stop bath 9a is applied to the intermediate transfer belt 66 of impermeable stop bath 9a, so the most of stop bath 9a that smears only is attached on the toner image.So can reduce the use amount of stop bath 9a.
And in the present embodiment, owing to adopted the structure that stop bath 9a is applied to the toner image on the intermediate transfer belt 66, therefore the paper powder that constitutes the fiber etc. of paper can not be attached to the surface of stop bath donor rollers 49a, and the paper powder can not be blended among the stop bath 9a in the photographic fixing liquid bath 48.Consequently, can not take place because of the paper powder enters the inhomogeneous of the photographic fixing liquid layer removed on the stop bath donor rollers 49a that scraper plate 53a produces, so can obtain the high quality images of stable for extended periods of time.
And in the present embodiment, owing to used the stop bath 9a of low aqueous solution of viscosity or aqueous dispersions form, therefore stop bath 9a promptly is penetrated in the interface that reaches toner particle and intermediate transfer belt 66 between the toner particle, can make the instantaneous softening and/or expansion of toner.Further, by the formation that the stop bath 9a in the photographic fixing liquid bath 48 are heated is set, the toner image transfer-fixing behind recording medium 8, but remain in stop bath 9a also short time inner drying at room temperature on the recording medium 8.
Fig. 8 is a side view of representing that schematically the major part as the image processing system 75 of the 4th embodiment of the present invention constitutes.
Image processing system 75 is similar with image processing system 62, the part of correspondence is marked with identical with reference to label and omit its explanation.And, to omitting diagram and explanation with a part.
Image processing system 75 is except following difference, has identical structure with image processing system 62: temperature sensor 35 is configured to contact with warm-up mill 32a or approaching, and configuration stop bath supply unit 36a, make the stop bath donor rollers 49a of stop bath supply unit 36a relative with warm-up mill 32a, stop bath donor rollers 49a and intermediate transfer belt 66 crimping via intermediate transfer belt 66.
That is, in image processing system 75, the 63a of intermediate transfer portion has: backing roll 26,27; Warm-up mill 32a; Intermediate transfer belt 66; Intermediate transfer rollers 22y, 22m, 22c, 22b; With temperature sensor 35.Intermediate transfer belt 66 opens frame by backing roll 26,27 and warm-up mill 32a and rotation drives.Intermediate transfer rollers 22y, 22m, 22c, the 22b toner image on intermediate transfer belt 66 transfer printing photosensitive drums 11y, 11m, 11c, 11b.Temperature sensor 35 is configured to contact with the surface of warm-up mill 32a or approaching, is used to detect the surface temperature of warm-up mill 32a.
And in the stop bath supply unit 36a of stop bath spreader portion 6a, stop bath donor rollers 49a is on the position relative with warm-up mill 32a via intermediate transfer belt 66, with intermediate transfer belt 66 crimping.
According to 63a of intermediate transfer portion and stop bath spreader portion 6a, the toner image that the toner image loading end 66a of intermediate transfer belt 66 is carried is heated by warm-up mill 32a, and is sent to the pressure contact portion of intermediate transfer belt 66 and stop bath donor rollers 49a.In the present embodiment, the temperature of setting warm-up mill 32a is 70 ℃, intermediate transfer belt 66 and stop bath donor rollers 49a contact the intermediate transfer belt 66 in the beginning portion and the temperature of toner image, are set to the lower temperature of glass transition temperature (is 60 ℃ at this) than the toner that constitutes toner image.In this pressure contact portion,,, produce the softening and/or expansion of toner Yi Bian smeared stop bath 9a on one side toner image is accepted heating.
According to image processing system 75, on intermediate transfer belt 66,, directly be sent to transfer-fixing portion 64 while accept the toner image that stop bath 9a and softening reaching/expansion are smeared in heating, and be transferred photographic fixing to recording medium 8, on recording medium 8, form image.This recording medium 8 is discharged to the outside of image processing system 75 by transport unit 65.
By adopting this structure, can will be used for replenishing the intermediate transfer belt 66 that produced when smearing stop bath 9a, carrying toner image and the heat that descends of the temperature of stop bath 9a in the above, descending with temperature offers intermediate transfer belt 66 and toner image simultaneously.So, after smearing stop bath 9a, the temperature that can prevent intermediate transfer belt 66, the toner image on it and stop bath 9a descends, and the stop bath 9a after therefore smearing promptly spreads, is penetrated in the toner image, and the softening and/or moment of expanding of toner is producing in a big way.Therefore, when toner image is pressed into recording medium 8 by transfer-fixing portion 64, can be firmly adhered on the recording medium 8, realize very high fixing strength.Further, because the temperature of stop bath 9a self after smearing rises by the heating of warm-up mill 32a, therefore smearing can dry at short notice stop bath 9a behind back or the transfer-fixing.By these effects, the output number that can further improve under the unit interval in the image processing system 75 is a handling capacity.
In the present embodiment, the surface temperature of warm-up mill 32a is set at 70 ℃, smears the temperature of the toner image before the stop bath 9a and set lowlyer, but be not limited thereto than the glass transition temperature (60 ℃) of toner.For example, also can make the surface temperature of warm-up mill 32a is 80 ℃, and the temperature of smearing the toner image before the stop bath 9a is that the glass transition temperature (60 ℃) than toner is high and than the low temperature of softening point (is 120 ℃ at this).In this case, before smearing stop bath 9a, the toner that constitutes toner image is softening, between the toner and the adhesion of toner and intermediate transfer belt 66 improve, therefore can prevent moving, condense etc. of the toner that causes because of the liquid stream of smearing stop bath 9a.And also can make the surface temperature of warm-up mill 32a is 150 ℃, and the temperature of smearing the preceding toner image of stop bath 9a is the high temperature of softening point (120 ℃) than toner.In this case, before smearing stop bath 9a, the further of toner image softened, and the adhesion that reaches toner and intermediate transfer medium 66 between the toner is stronger, can prevent that therefore the toner when stop bath 9a adheres to from moving, condensing.
Fig. 9 is a side view of representing that schematically the major part as the image processing system 76 of the 5th embodiment of the present invention constitutes.
Image processing system 76 is similar with image processing system 62, the part of correspondence is marked with identical with reference to label and omit its explanation in illustrated part.And, to omitting diagram and explanation with a part.
Image processing system 76 is characterised in that, warm-up mill 32a is set to, under the position of the backing roll 26 of image processing system 62, the same with backing roll 26, relative via intermediate transfer belt 66 with backer roll 40, and with intermediate transfer belt 66 crimping, temperature sensor 35 is set to contact with the surface of warm-up mill 32a or is approaching, in image processing system 62, be provided with on the position of warm-up mill 32a, backing roll 25 is set.
Further, in the stop bath supply unit 36b of image processing system 76, in photographic fixing liquid bath 48, keep stationary temperature, be provided with not shown temperature control part in order to make stop bath 9a.
That is, image processing system 76 has: the 63b of intermediate transfer portion of toner image formation portion 2 (only illustrating photosensitive drums 11b) (only illustrating intermediate transfer rollers 22b, intermediate transfer belt 66, backing roll 25 and warm-up mill 32a) stop bath spreader portion 6a; Transfer-fixing portion 77; Transport unit (not shown); With recording medium supply unit (not shown).
The 63b of intermediate transfer portion has: backing roll 25; Warm-up mill 32a; Backing roll 27 (not shown); Intermediate transfer belt 66; Intermediate transfer rollers 22y, 22m, 22c, 22b (part is not shown); With temperature sensor 35.Warm-up mill 32a is set to and can drives along the direction rotation of arrow 71.Intermediate transfer belt 66 opens frame by backing roll 25,27 and warm-up mill 32a and rotation drives.Intermediate transfer rollers 22y, 22m, 22c, the 22b toner image on intermediate transfer belt 66 transfer printing photosensitive drums 11y, 11m, 11c, 11b (part is not shown).Temperature sensor 35 is set to contact with the surface of warm-up mill 32a or approaching, is used to detect the surface temperature of warm-up mill 32a.According to the 63b of intermediate transfer portion, on the toner image loading end 66a of intermediate transfer belt 66, the superimposed transfer printing of versicolor toner image on photosensitive drums 11y, 11m, 11c, the 11b forms a toner image.This toner image is along with the rotation of intermediate transfer belt 66 drives and transmits.
The temperature sensor 35 that is provided for detecting its surface temperature to warm-up mill 32a is very easy, therefore intermediate transfer belt 66 and toner image can be heated to steady temperature, and then can under controlled condition, implement stop bath 9a smear and toner image to the transfer-fixing of recording medium 8, therefore can always obtain high quality images.Relative with it, in recording medium 8, when to recording paper coating stop bath 9a, need according to kind (perviousness of thickness, the liquid etc.) change of recording paper smear condition (applying amount, when smearing the liquid temperature, smear speed etc.).Further, the setting of temperature sensor etc. also is not easy.
Stop bath spreader portion 6b has: stop bath supply unit 36b; The not shown stop bath holding tank of storage stop bath 9a; The stop bath 9a of stop bath holding tank is supplied to the stop bath supply pipe (not shown) of stop bath supply unit 36b.Stop bath supply unit 36b, except temperature control part (not shown) is set in photographic fixing liquid bath 48, have with image processing system 62 in the same structure of stop bath supply unit 36a.Temperature control part is used to make the liquid temperature of stop bath 9a to keep constant and is provided with, and has temperature sensor, and the well heater of the liquid temperature that detects stop bath 9a.The testing result of temperature sensor is imported into the not shown CPU that is used to control image processing system 76 molar behaviors, and CPU transmits control signal according to testing result, and control applies the output of the not shown power supply of voltage to well heater.By temperature control part, when toner image is applied to stop bath 9a, can prevent that the temperature of toner image from dropping to the degree that transfer-fixing is produced obstacle.And during transfer-fixing, it is softening and/or expand that softening, the stop bath 9a that causes along with heating causes, and toner image is firmly adhered on the recording medium 8, can obtain higher fixing strength.The holding temperature of stop bath 9a is not particularly limited so long as the temperature that stop bath 9a does not seethe with excitement gets final product, but considers the heat exhaustion amount, is preferably 35～45 ℃.In the present embodiment, the liquid temperature of the stop bath 9a in the photographic fixing liquid bath 48 remains on 40 ℃.According to stop bath spreader portion 6b, the toner image of being carried to the toner image loading end 66a of intermediate transfer belt 66 is smeared by the way of contact and to be warmed to about 40 ℃ stop bath 9a, make the toner that constitutes this toner image softening and/expand.In the present embodiment, owing to smear stop bath 9a to intermediate transfer belt 66 as the toner image carrier of impermeable stop bath 9a, do not act on toner image and be absorbed into the stop bath 9a of toner image carrier inside, the therefore waste of rarer stop bath 9a.Therefore, can realize the reduction of the consumption of stop bath 9a.Further, owing to be to carry out transfer-fixing under the state of the stop bath 9a that smears from constant basis to toner image, therefore can not produce obstacle ground under constant transfer-fixing condition carries out transfer-fixing.
Transfer-fixing portion 77 has backer roll 40, and this backer roll 40 is set to: relative via intermediate transfer belt 66 with warm-up mill 32a, and with intermediate transfer belt 66 crimping, and can drive along the rotation of the direction of arrow 72.According to transfer-fixing portion 77, the toner image by stop bath 9a softens and/or expands under the state by intermediate transfer belt 66 carryings, is sent to the pressure contact portion of warm-up mill 32a and backer roll 40.In this pressure contact portion, be subjected to the heating of warm-up mill 32a from the opposite side joint of toner image loading end 66a.Meanwhile, synchronous with the transmission of toner image, toner image is superimposed to be pressed on the recording medium of supplying with from recording medium supply unit 78, and on recording medium 8 transfer-fixing, form image.That is, adopt following structure in the present embodiment: in intermediate transfer belt 66, heat from the face with the opposite side of toner image loading end 66a, wiping one's face from being coated with of stop bath 9a is transferred to recording medium 8.In intermediate transfer belt 66, toner image loading end 66a is made of the material that is easy to fusion by heating, and the face of its opposite side is made of the material that is not easy to fusion by heating.When carrying toner image on this opposite side was carried out transfer-fixing to recording medium 8, the adhesion of toner image and recording medium 8 was not enough sometimes.Therefore, by toner image is carried on the toner image loading end 66a, and smear stop bath 9a, and carry out complementary heating to it, can fully improve the adhesion of toner image and recording medium 8, obtain the photographic fixing image higher with respect to the fixing strength of recording medium 8.
And in the present embodiment, the surface temperature of warm-up mill 32a is set at 75 ℃, makes the glass transition temperature (in present embodiment be 60 ℃) low (preferably low 2～5 ℃ temperature) of the temperature that contacts intermediate transfer belt 66 in the beginning portion and toner image of the toner image of having smeared stop bath 9a and recording medium 8 than toner.
Form record images medium 8 and be transmitted, and output to the row's paper disc 41 that is arranged on image processing system 76 outsides by exit roller 56a, 56b by transport unit 65.
According to image processing system 76, at first the toner image of carrying to the toner image loading end 66a by intermediate transfer belt 66 is smeared stop bath 9a, makes the softening and/or expansion of the toner that constitutes toner image.Then, this toner image is transferred photographic fixing under heating, form image on recording medium 8.
In the present embodiment, the surface temperature of warm-up mill 32a is made as 70 ℃, the intermediate transfer belt that contacts beginning portion 66 of toner image and recording medium 8 and the temperature of toner image are set at the low temperature of glass branchpoint (60 ℃) than toner, but are not limited thereto, and can suitably change temperature and set.For example, making the surface temperature of warm-up mill 32a is 80 ℃, makes glass transition temperature (60 ℃) height of the temperature of the intermediate transfer belt that contacts beginning portion 66 of toner image and recording medium 8 and toner image than toner.In this case, during transfer-fixing, toner is because of thermal softening, therefore can reduce to be used to make toner softening and/or expand and the applying amount of the stop bath 9a that smears.And, owing to smear stop bath 9a, to compare with thermal transfer mode, the design temperature in the time of can reducing transfer-fixing reduces heat exhaustion, the heating-up time till the design temperature when shortening to transfer-fixing, promptly shortens preheating time.
Further, toner image till in the time of can preventing transfer-fixing and the temperature of stop bath 9a descend, and can keep the soft state of toner conscientiously.Therefore, can fully guarantee the fixing strength of toner image, can further reduce not being transferred on the intermediate transfer belt 66 and residual toner recording medium 8.
Further, because the temperature of the recording medium 8 behind the transfer-fixing uprises, therefore can further accelerate the drying of stop bath 9a.So, the output number that can improve under unit interval of image processing system 76 is a handling capacity.
And in the present embodiment, also can make the surface temperature of warm-up mill 32a be made as 140 ℃, the intermediate transfer belt that contacts beginning portion 66 of toner image and recording medium 8 and the temperature of toner image are than softening point (120 ℃) height of toner.In this case, can further improve effect identical when being 80 ℃ with the surface temperature that makes warm-up mill 32a.
Figure 10 is a side view of representing that schematically the major part as the image processing system 78 of the 6th embodiment of the present invention constitutes.Image processing system 78 has similar structure with image processing system 1,62, the part of correspondence is given identical with reference to label and omit its explanation.And to omitting diagram and explanation with a part.
Toner image formation portion have with image processing system 1 in toner image formation portion 2 similar structures.But, even on the direction of the direction of transfer in the direction image processing system 1 of the direction of transfer that makes intermediate transfer belt 21 at arrow 82 counter-rotating, from upstream one side configuration image-generating unit 10y, 10m, 10c, the 10b of the direction of arrow 82.The rotation driving direction of each parts in each image-generating unit is also along with becoming reverse rotation.The configuration of image-generating unit 10y, 10m, 10c, 10b is opposite with the configuration in the image processing system 1.
Intermediate transfer portion also have with image processing system 1 in intermediate transfer portion 4 similar structures.But as mentioned above, owing to the direction of transfer of intermediate transfer belt 21 is changed to the direction of arrow 82, therefore be with clearer 28 not relative with backing roll 27, but be set to via intermediate transfer belt 21 and backing roll 25 relative and with the toner image loading end 21a butt of intermediate transfer belt 21.
Transfer-fixing portion 79 has transfer-fixing roller 80, stop bath spreader portion 6a, backer roll 40, cleaning section 81 and temperature sensor 35.Transfer-fixing roller 80 is set to have in inside well heater 33 and can be driven by drive division (not shown) and make its direction rotation along arrow 84.Stop bath spreader portion 6a smears stop bath 9a to transfer-fixing roller 80.Around transfer-fixing roller 80, set gradually stop bath spreader portion 6a, backer roll 40, cleaning section 81 and temperature sensor 35 from rotation driving direction upstream one side of transfer-fixing roller 80.And in the rotation driving direction of transfer-fixing roller 80, in the downstream of temperature sensor 35 side, transfer-fixing roller 80 is relative with backing roll 26 via intermediate transfer belt 21, and with intermediate transfer belt 21 crimping.
Transfer-fixing roller 80 uses the roller shape parts that form elastic layer and superficial layer on metal surface successively.In the present embodiment, transfer-fixing roller 80 uses the roller of following formation: on the plug that the carbon steel by thick 1mm constitutes, be provided with by volume resistance 10
8～10
9The elastic layer of the thick 3mm that the silicone rubber of Ω cm constitutes, and the roller of the further external diameter 30mm that the superficial layer of the thick 20 μ m that are made of PFA is set and constitutes.Smear the voltage with the charged current potential opposite polarity of toner on the transfer-fixing roller 80, for example+voltage of 1kV, the electrostatic attraction toner also carries out transfer printing.In the warm-up mill 33 that the inside of transfer-fixing roller 80 is provided with, for example use the well heater that constitutes by Halogen lamp LED.Well heater 33 is according to the testing result of the temperature sensor 35 of the surface temperature that is used to detect transfer-fixing roller 80, the signal that the CPU of the molar behavior by being used to control image processing system 78 sends, control, make the integral surface temperature of transfer-fixing roller 80 become even.
Apply transfer electric field by not shown voltage application portion between transfer-fixing roller 80 and intermediate transfer belt 21, the toner image loading end 21a of intermediate transfer belt 21 goes up the toner image that forms and is transferred to transfer-fixing roller 80 statically.Be transferred to of well heater 33 heating of the toner image of transfer-fixing roller 80, be used for smearing of stop bath by transfer-fixing roller 80 inside.
Stop bath spreader portion 6a, have with image processing system 62 in the identical structure of stop bath spreader portion 6a.According to stop bath spreader portion 6a, at first, stop bath donor rollers 49a makes stop bath 9a be attached to the surface of stop bath donor rollers 49a by rotating in the stop bath 9a of photographic fixing liquid bath 48.This stop bath 9a forms the thin layer that roughly has constant thickness by restrict rollers 51, in the pressure contact portion of stop bath donor rollers 49a and transfer-fixing roller 80, is applied on the toner image on the transfer-fixing roller 80.Toner image is heated from the surface of contact with transfer-fixing roller 80, from outer Monday side smeared stop bath 9a, the toner that constitutes toner image is softening and/or expand under heated state.On the other hand, the unnecessary stop bath 9a that is attached to the surface of restrict rollers 51 is removed from the surface of restrict rollers 51 by removing scraper plate 53a.
So, in the present embodiment, on the toner image carrier (transfer-fixing roller 80) different, smear stop bath 9a, therefore have stop bath 9a and be difficult to be attached to advantage on the intermediate transfer belt 21 to toner image with intermediate transfer belt 21.And, owing to be not on intermediate transfer belt 21, but on transfer-fixing roller 80, toner image is heated, so the temperature of intermediate transfer belt 21 is difficult to rise.Therefore, the toner deterioration that can prevent that the temperature of the component parts of toner image formation portion from rising, produces in the toner image forming process because of stop bath 9a etc. can obtain high quality images steadily in the long term.
And in the present embodiment, toner image heats from a face (lower layer part of transfer-fixing roller 80 surfaces=toner image), and accepts smearing of stop bath 9a from another face (the outermost layer portion of the outer circumferential side=toner image of transfer-fixing roller 80).That is, the side that toner image contacts from the surface with transfer-fixing roller 80 is heated, and from being subjected to smearing of stop bath 9a with the surperficial relative side joint of stop bath donor rollers 49a.Therefore, constitute whole toners softening and/or expansion under the situation that has sufficient adhesion with respect to recording medium 8 of toner image, can obtain to the higher image of the fixing strength of recording medium 8.Iff heating, fully softening at part (lower layer part of the toner image) toner that contacts with the transfer-fixing roller 80 of toner image, but because the major part of toner is the low binder resin of thermal conductivity, therefore the outermost layer portion temperature in toner image is difficult to rise, toner can't be fully softening, to the inadequate danger that becomes of the adhesion of recording medium 8.Therefore, smear stop bath 9a by outermost layer one side from toner image, constituting the whole toners of toner image can fully soften and/or expand, and can improve the adhesion of toner image to recording medium 8.So, even photographic fixing figure image curvature, the photographic fixing image can not peeled off yet, and can obtain the high image of fixing strength.
In the present embodiment, backer roll 40 is with line pressure and 80 crimping of transfer-fixing roller of 10N/cm.Thereby on the transfer-fixing roller 80, be heated and smeared the pressure contact portion that toner image that stop bath 9a makes toner be in softening and/or swelling state is sent to backer roll 40 and transfer-fixing roller 80, synchronous with it, recording medium transmits from recording medium supply unit 7, accept pushing of backer roll 40, toner image transfer printing and photographic fixing form image to recording medium 8.
According to transfer-fixing portion 79, the toner image on the intermediate transfer belt 21 is transferred to the surface of transfer-fixing roller 80, on transfer-fixing roller 80, under heating, make stop bath 9a be applied to toner image, make the fully softening and/or expansion of toner, transfer-fixing forms image to recording medium 8 afterwards.
Transport unit is identical with transport unit 65 in the image processing system 62.
The recording medium supply unit is identical with recording medium supply unit 7 in the image processing system 1.
According to image processing system 78, the toner image that is formed on the toner image loading end 21a of intermediate transfer belt 21 by toner image formation portion is transferred to transfer-fixing roller 80, on transfer-fixing roller 80, be heated, further under heating, after smearing stop bath 9a, transfer-fixing forms image to recording medium 8.Form record images medium 8 and be transmitted, and be discharged to the outside of image processing system 78 by exit roller by transport unit 65.
In the present embodiment, stop bath 9a is with respect to the applying amount of the unit area of the toner image on the transfer-fixing roller 80, and is irrelevant with the temperature of toner image, is constant, but is not limited thereto, and also can change the applying amount of stop bath 9a according to the temperature of toner image.
The control of the applying amount of stop bath 9a, in stop bath supply unit 36a, peripheral speed that for example can be by making stop bath donor rollers 49 and restrict rollers 51 than, particularly the rotational speed of restrict rollers 51 is variable implements.For example, when improving the rotational speed of restrict rollers 51, the amount of the stop bath 9a on the stop bath donor rollers 49a reduces, and can reduce the applying amount of stop bath 9a to toner image.Under this structure, the peripheral speed ratio of restrict rollers 51 and stop bath donor rollers 49a is 0.4 o'clock, and stop bath 9a is 10g/m to the applying amount of toner image
2, the peripheral speed ratio is 0.5 o'clock, applying amount is 8g/m
2, the peripheral speed ratio is 0.6 o'clock, applying amount is 6g/m
2
Control to applying amount further is specifically described.For example, the surface temperature of transfer-fixing roller 80 is set at 140 ℃, after image processing system 78 starting, when the surface temperature of transfer-fixing roller 80 is in the rising, making restrict rollers 51 is 0.4 with respect to the circumference specific rate of stop bath donor rollers 49a, makes applying amount than generally many.And when the surface temperature of transfer-fixing roller 80 arrives 40 ℃, and when keeping constant, making the peripheral speed ratio is 0.5, reduces applying amount and gets final product.
And, the surface temperature of transfer-fixing roller 80 is set at 150 ℃, for example the surface temperature of transfer-fixing roller 80 is in 120～140 ℃ scope, and making the applying amount with respect to the stop bath 9a of toner image is 10g/m
2, in the scope more than 140 ℃, also can make applying amount is 8g/m
2If follow the control of the applying amount of the stage that surface temperature changes, pining for also making toner image photographic fixing more effectively in advance to recording medium 8.
Under such structure, more weak the pining in advance of hot photographic fixing effect begin to arrive predetermined temperature from device starting till, toner to the surface temperature of transfer-fixing roller 80, because the stop bath 9a that coating is more, therefore the photographic fixing image that can obtain to have abundant fixing strength.Therefore, can obtain not have image processing system stand-by time, Fast starting.
Be applied to the applying amount control of the stop bath 9a on the toner image, not only can recently carry out with respect to the peripheral speed of stop bath donor rollers 49a by change restrict rollers 51, also can be for example by elastic scraper being pressed into the surperficial of stop bath donor rollers 49a and changing its pressing force and carry out.
Figure 11 is the side view of major part structure of schematically representing the image processing system 85 of the 7th embodiment of the present invention.
In image processing system 85, transfer-fixing portion 86 comprises transfer-fixing roller 80, stop bath spreader portion 87, backer roll 40, cleaning section 81 and temperature sensor 35.Transfer-fixing roller 80 has well heater 33 in inside.Around transfer-fixing roller 80, set gradually stop bath spreader portion 87, backer roll 40, cleaning section 81 and temperature sensor 35 from the rotation driving direction upstream side of transfer-fixing roller 80.
Stop bath supply unit 87 has nozzle array 88.Nozzle array 88 is devices of arranging a plurality of small nozzles (not shown) as follows according to electronic control signal: make the small dropping liquid of stop bath 9a fly to the toner image loading end of transfer-fixing roller 80.The arrangement pitches of small nozzle is set to: from seamlessly be covered at least toner image bearing area on transfer-fixing roller 80 surfaces of the small dropping liquid of the stop bath 9a of small nozzle ejection.And, in nozzle array 88, can suitably change the diameter of small dropping liquid.By control dropping liquid diameter, may command is smeared the density (counting) of dropping liquid, can make the applying amount of stop bath 9a be controlled at for example 1～10g/m
2Scope in.
If use nozzle array 88, can be according to the applying amount of the control of the toner adhesion amount on the transfer-fixing roller 80 stop bath 9a.For example, when stop bath 9a is smeared on the surface that surface temperature is set at 140 ℃ transfer-fixing roller 80, be 8g/m only to the toner adhesion amount of judging by picture signal
2Above part is with applying amount 4g/m
2Smear stop bath 9a.This toner adhesion amount (8g/m
2) be that design temperature is in 140 ℃ the transfer-fixing roller 80, toner image can be transferred to the upper limit of the toner adhesion amount of recording medium 8, if adhesion amount is more than it, the danger that obtains the inadequate photographic fixing image of fixing strength is then arranged, therefore solve this point by smearing stop bath 9a.
By adopting such structure, the part of smearing stop bath 9a limits, and therefore can reduce the consumption of stop bath 9a.Because occupying the most of toner is the low binder resin of thermal conductivity, therefore in the many parts of toner adhesion amount, the outermost layer portion temperature of toner image is difficult to rise, and toner can't be fully softening, has the inadequate danger of the adhesion of recording medium 8.The decline of adhesion replenishes by smearing stop bath 9a, and the toner that constitutes whole toner image can fully soften and/or expand, and can improve the adhesion of toner image to recording medium 8.And when toner image was smeared stop bath 9a, toner image was attached to that stop bath 9a is smeared on the face of recording medium 8, compare during therefore with simple heating, the increase of adhesion is bigger, even photographic fixing figure image curvature, the photographic fixing image can not peeled off yet, and can obtain the high image of fixing strength.And in the few part of toner adhesion amount, in the outermost layer portion of toner image, temperature fully rises, even therefore do not smear stop bath 9a, also can guarantee the sufficient fixing strength to recording medium.
In the present embodiment, stop bath 9a is with respect to the applying amount of the unit area of the toner image on the transfer-fixing roller 80, and is irrelevant with the temperature of toner image, is constant, but is not limited thereto, and also can change the applying amount of stop bath 9a according to the temperature of toner image.
For example, the surface temperature of transfer-fixing roller 80 is set at 140 ℃, the surface temperature of transfer-fixing roller 80 when rising for 140 ℃, makes applying amount only increase 1g/m
2, when arriving 140 ℃, make applying amount only reduce 1g/m
2Get final product.
And the surface temperature of transfer-fixing roller 80 is set at 140 ℃, the surface temperature of transfer-fixing roller 80 when rising for 140 ℃, to the toner adhesion amount less than 8g/m
2Part also with 2g/m
2Ratio smear stop bath 9a, when arriving 140 ℃, can be only to toner adhesion amount 8g/m
2Or its above part is smeared stop bath 9a.
According to these structures, in the warming up period begin to arrive predetermined temperature from device starting till,, can obtain to have the photographic fixing image of sufficient fixing strength by apply stop bath 9a morely to the surface temperature of transfer-fixing roller 80.Therefore, can obtain not have image processing system stand-by time, that Fast starting is possible.
Figure 12 is a side view of representing that schematically the major part as the image processing system 90 of the 8th embodiment of the present invention constitutes.
Image processing system 90 has and image processing system 78 similar structures, the part of correspondence is marked with same label and omits explanation, to omitting diagram and explanation with a part.
Image processing system 90 is except following aspect, and have the structure identical with image processing system 78: the 79a of transfer-fixing portion has: temperature sensor 35a in order to detect the surface temperature of backer roll 40a, and is set to contact with the surface of backer roll 40a or approaching; And well heater (heating lamp) 33, in the inside of warm-up mill 40a, the temperature detection signal control heating action according to from temperature sensor 35a makes backer roll 40a become predetermined design temperature.It is characterized in that being provided with the temperature sensor 35a of the temperature that is used to detect backer roll 40a.
The 79a of transfer-fixing portion of image processing system 90 has transfer-fixing roller 80, stop bath spreader portion 6a, backer roll 40a, cleaning section 81, temperature sensor 35 and temperature sensor 35a.Transfer-fixing roller 80 has well heater 33 in inside.Backer roll 40a has well heater in inside.Around transfer-fixing roller 80, begin to set gradually backer roll 40a, cleaning section 81 and the temperature sensor 35 that stop bath spreader portion 6a, inside have well heater 33 from rotation driving direction upstream one side of transfer-fixing roller 80.Temperature sensor 35 is set to contact with backer roll 40a surface or approaching.
The testing result of the surface temperature of that temperature sensor 35a carries out, backer roll 40a is as detecting output, send to the CPU of the molar behavior that is used to control image processing system 90, CPU sends to stop bath spreader portion 6a according to detecting output with control signal, the applying amount of the stop bath 9a of control stop bath supply unit 36a.The control example of applying amount can recently be implemented with respect to the peripheral speed of stop bath donor rollers 49a by adjusting restrict rollers 51 as in stop bath supply unit 36a.In image processing system 90, according to the surface temperature of backer roll 40a, the applying amount of the stop bath 9a of the toner image of control on transfer-fixing roller 80.
The control example of the applying amount of the stop bath 9a of serviceability temperature sensor 35a is as implementing by the following method.The surface temperature of backer roll 40a for example is set at 70 ℃, after image processing system 90 startings, do not reach 70 ℃ and when rising in the surface temperature of backer roll 40a, the peripheral speed ratio of 51 pairs of stop bath donor rollers of restrict rollers 49a is adjusted into 0.4, increase the applying amount of stop bath 9a.And when the surface temperature of backer roll 40a arrived 70 ℃, making the peripheral speed ratio was 0.5, was to compare in 0.4 o'clock with the peripheral speed ratio, the applying amount of stop bath 9a is reduced get final product.Promptly, after starting, because the surface temperature of backer roll 40a does not reach design temperature, therefore with the pressure contact portion of transfer-fixing roller 80 in the photographic fixing effect of heat insufficient, but, between the more weak warming up period of the photographic fixing effect of heat, also can obtain to have the photographic fixing image of sufficient fixing strength by smearing more stop bath 9a.Therefore, but can obtain not have the image processing system of the Fast starting of stand-by time.
The control of the applying amount of stop bath 9a also can be implemented according to the surface temperature of backer roll 40a interimly.For example, the surface temperature of backer roll 40a is set at 90 ℃, when surface temperature is that to make applying amount below 50 ℃ the time be 10g/m
2, making applying amount in 50 ℃～70 ℃ scope is 9g/m
2, making applying amount in 70 ℃～90 ℃ scope is 8g/m
2, be 6g/m in time more than 90 ℃
2, then can irrespectively obtain the high photographic fixing image of fixing strength with surface temperature.
According to present embodiment, surface temperature according to pressure-producing part (backer roll 40a), suitably select applying amount to the stop bath 9a of toner image, thereby after image processing system 90 startings, in between the warming up period of the surface temperature no show predetermined temperature of pressure-producing part, the photographic fixing image that also can obtain to have abundant fixing strength.And the surface temperature of pressure-producing part is set highly more, can reduce the applying amount of stop bath 9a more, therefore can reduce the consumption of stop bath 9a.
In image processing system of the present invention, make the stop bath 34 that toner is softening and/or expand, but be not limited thereto, also can use and knownly contain bonding component, be bonded into the stop bath that grades.The concrete example of bonding composition for example comprises: with macromolecule elastic bodys such as chloroprene rubber, nitrile rubber, SBR rubber is the rubber adhesive of principal ingredient, water wettability synthetic resin such as vinyl acetate, vinyl-vinyl acetate copolymer (EVA), acryl resin is distributed to emulsion binder that forms in the water etc.By adopting this structure, the adhesion of toner and recording medium 8 not only softens and/or expands by toner to be smeared, and smear by bonding composition or coordinator, therefore can improve adhesion, and improve the fixing strength of toner image to recording medium 8.
In image processing system of the present invention, the employed material of each roller, layer structure, size etc. are not limit foregoing, can directly use the commonly used or suitable content of change in the image formation field of this electrofax mode.Also can use band to wait endless member to replace roller.And,, also can make the roll forming attitude though intermediate transfer belt, travelling belt etc. are endless members.
Image processing system of the present invention is that the coloured image of series system forms device in each embodiment, but being not limited thereto, for example can be the once coloured image formation device of four rotation modes of what is called of the image of overlapping a kind of color of the every rotation of intermediate transfer belt.And, be not limited to coloured image and form device, also monochrome image forms device.
This formation device of the present invention for example can be used as two or more compounding machine of duplicating machine, printer, facsimile recorder or its and uses.
The present invention can implement under the prerequisite that does not break away from its purport or principal character in every way.Therefore above-mentioned embodiment only is simple example from various angles, and scope of the present invention is not subjected to any constraint of instructions text shown in the claim scope.And the distortion in the claim scope, change all belong to scope of the present invention.
Claims (46)
1. an image processing system is characterized in that,
Have: the toner image formation portion (2) that forms toner image;
To form toner image that portion (2) forms by toner image and be transferred to transfer printing portion (4) on the recording medium;
Heating part (5,61) to the heating of recording medium surface; With
Stop bath spreader portion (6,6c) is smeared stop bath to the surface of recording medium, and described stop bath is by making toner softening and/or expand and make the toner photographic fixing to recording medium,
Wherein, heating part (5,61) and stop bath spreader portion (6,6c) are set,, the recording medium surface are heated by heating part (5,61) with before recording medium being smeared stop bath or smearing in the stop bath by stop bath spreader portion (6,6c).
2. image processing system according to claim 1 is characterized in that, at least the toner image in the recording medium is formed the zone, is heated by heating part (5,61), and smears stop bath by stop bath spreader portion (6,6c).
3. image processing system according to claim 1 is characterized in that, heating part (5,61) are the high temperature of glass transition temperature than the toner that forms toner image to the heating-up temperature of toner image.
4. image processing system according to claim 1 is characterized in that, heating part (5,61) are the high temperature of softening point than the toner that forms toner image to the heating-up temperature of toner image.
5. image processing system according to claim 1 is characterized in that,
Stop bath spreader portion (6,6c),
Comprise: the toner amount test section that detects the toner amount in the toner image; With
Can partly change the stop bath applying amount control part of the applying amount of stop bath according to control signal from toner amount test section,
Be that scheduled volume or the toner image more than the scheduled volume are smeared stop bath only to the toner amount.
6. image processing system according to claim 1 is characterized in that, also comprises the stop bath insulation portion to the stop bath heat tracing.
7. image processing system according to claim 1 is characterized in that, stop bath contains increases the bonding agent of toner image to the adhesion of recording medium.
8. image processing system according to claim 1 is characterized in that, toner contains polyester as binder resin, and the glass transition temperature wax composition lower than polyester.
9. image processing system according to claim 1 is characterized in that, the volume average particle size of toner is 2 μ m～7 μ m.
10. image processing system according to claim 1 is characterized in that stop bath also contains release agent.
11. an image processing system is characterized in that,
Have: the toner image formation portion (2) that forms toner image;
Intermediate transfer portion (3,63), contain intermediate transfer medium (21,66), to be transfer printing form the first toner image carrier of the toner image that portion (2) forms by toner image to this intermediate transfer medium, it is made of material of impermeable stop bath on the surface at least, and described stop bath is by making toner softening and/or expand and make the toner image photographic fixing to recording medium;
Heating part (33) is to middle offset medium (21,66) or the heating of the toner image carrier (80) beyond it;
Stop bath spreader portion (6a, 87) is smeared stop bath to intermediate transfer medium (66) or the toner image carrier (80) beyond it; With
The toner image transfer printing of stop bath and photographic fixing will have been smeared to recording medium by transfer-fixing portion (64,79,79a, 86),
Wherein, heating part (33) and stop bath spreader portion (6a, 87) are set, with before the toner image carrier (80) beyond middle offset medium (21,66) or its being smeared stop bath or smearing in the stop bath, middle offset medium (21,66) or the toner image carrier (80) beyond it are heated by heating part (33) by stop bath spreader portion (6a, 87).
12. want 11 described image processing systems according to right, it is characterized in that, at least the toner image in middle offset medium (21,66) or other toner image carriers (80) is formed the zone, heat, and smear stop bath by stop bath spreader portion (6a, 87) by heating part (33).
13. image processing system according to claim 11 is characterized in that, heating part (33) are the high temperature of glass transition temperature than the toner that forms toner image to the heating-up temperature of toner image.
14. image processing system according to claim 11 is characterized in that, heating part (33) are the high temperature of softening point than the toner that forms toner image to the heating-up temperature of toner image.
15. image processing system according to claim 11 is characterized in that,
Transfer-fixing portion (79,79a, 86) also comprises and can have heating part (33) second toner image carriers (80) in surface bears toner image and its inside,
Stop bath spreader portion (6a, 87) is set to: smear stop bath to the toner image that the second toner image carrier (80) is carried.
16. image processing system according to claim 15 is characterized in that,
Transfer-fixing portion (79,86) also comprises:
Temperature detecting part (35) detects the surface temperature of the second toner image carrier (80); With
The first applying amount control part, according to the testing result from temperature detecting part (35), control is applied to the applying amount of the stop bath of toner image by stop bath spreader portion (6a, 87).
17. image processing system according to claim 16, it is characterized in that, the first applying amount control part, the action of control stop bath spreader portion (6a, 87), so that the stop bath applying amount of the surface temperature of the second toner image carrier (80) that detects by temperature detecting part (35) when being lower than first predetermined temperature, be that first predetermined temperature or its are many when above than the surface temperature of the second toner image carrier (80).
18. image processing system according to claim 15 is characterized in that,
Transfer-fixing portion (79a) also comprises: via the pressure-producing part (40a) of the recording medium and second toner image carrier (80) crimping;
Detect the pressure-producing part temperature detecting part (35a) of the surface temperature of pressure-producing part (40a); With
The second applying amount control part, according to testing result from pressure-producing part temperature detecting part (35a), the applying amount of the stop bath that control is smeared to toner image by stop bath spreader portion (6a),
The second applying amount control part, the action of control stop bath spreader portion (6a), so that the stop bath applying amount of the surface temperature of the pressure-producing part (40a) that detects by pressure-producing part temperature detecting part (35a) when being lower than second predetermined temperature, be that second predetermined temperature or its are many when above than the surface temperature of pressure-producing part (40a).
19. image processing system according to claim 11 is characterized in that,
Stop bath spreader portion (87),
Comprise: the toner amount test section that detects the toner amount in the toner image; With
Can partly change the stop bath applying amount control part of the applying amount of stop bath according to control signal from toner amount test section,
Be that scheduled volume or the toner image more than the scheduled volume are smeared stop bath only to the toner amount.
20. image processing system according to claim 11 is characterized in that, also comprises the stop bath insulation portion to the stop bath heat tracing.
21. image processing system according to claim 11 is characterized in that, stop bath contains increases the bonding agent of toner image to the adhesion of recording medium.
22. image processing system according to claim 11 is characterized in that, toner contains polyester as binder resin, and the glass transition temperature wax composition lower than polyester.
23. image processing system according to claim 11 is characterized in that, the volume average particle size of toner is 2 μ m～7 μ m.
24. image processing system according to claim 11 is characterized in that, stop bath also contains release agent.
25. an image processing system is characterized in that,
Have: the toner image formation portion (2) that forms toner image;
Intermediate transfer portion (3,63b), contain intermediate transfer medium (21,66), to be transfer printing form the first toner image carrier of the toner image that portion (2) forms by toner image to this intermediate transfer medium, its surperficial at least material by impermeable stop bath constitutes, described stop bath is by making toner softening and/or expand and make the toner image photographic fixing to recording medium
Heating part (33) is to middle offset medium (21,66) or the heating of the toner image carrier (80) beyond it;
Stop bath spreader portion (6a, 6b, 87) is smeared stop bath to intermediate transfer medium (66) or the toner image carrier (80) beyond it; With
The toner image transfer printing of stop bath and photographic fixing will have been smeared to recording medium by transfer-fixing portion (77,79,79a, 86),
Wherein, heating part (33) and transfer-fixing portion (77,79,79a, 86) are set, so that heating part (33) to the heating of the toner image carrier (80) beyond middle offset medium (21,66) or its, toner image is carried out in the transfer-fixing of recording medium in transfer-fixing portion (77,79,79a, 86).
26. want 25 described image processing systems according to right, it is characterized in that, at least the toner image in middle offset medium (21,66) or other toner image carriers (80) is formed the zone, heat by heating part (33), and smear stop bath by stop bath spreader portion (6a, 6b, 87).
27. image processing system according to claim 25 is characterized in that, heating part (33) are the high temperature of glass transition temperature than the toner that forms toner image to the heating-up temperature of toner image.
28. image processing system according to claim 25 is characterized in that, heating part (33) are the high temperature of softening point than the toner that forms toner image to the heating-up temperature of toner image.
29. image processing system according to claim 25 is characterized in that,
Transfer-fixing portion (79,79a, 86) also comprises the second toner image carrier (80) that can have heating part (33) in surface bears toner image and its inside,
Stop bath spreader portion (6a, 6b, 87) is set to: smear stop bath to the toner image that the second toner image carrier (80) is carried.
30. image processing system according to claim 29 is characterized in that,
Transfer-fixing portion (79,86) also comprises:
Temperature detecting part (35) detects the surface temperature of the second toner image carrier (80); With
The first applying amount control part, according to the testing result from temperature detecting part (35), control is applied to the applying amount of the stop bath of toner image by stop bath spreader portion (6a, 87).
31. image processing system according to claim 30, it is characterized in that, the first applying amount control part, the action of control stop bath spreader portion (6a, 87), so that the stop bath applying amount of the surface temperature of the second toner image carrier (80) that detects by temperature detecting part (35) when being lower than first predetermined temperature, be that first predetermined temperature or its are many when above than the surface temperature of the second toner image carrier (80).
32. image processing system according to claim 29 is characterized in that,
Transfer-fixing portion (79a) also comprises:
Pressure-producing part (40a) via the recording medium and second toner image carrier (80) crimping;
Detect the pressure-producing part temperature detecting part (35a) of the surface temperature of pressure-producing part (40a); With
The second applying amount control part, according to testing result from pressure-producing part temperature detecting part (35a), the applying amount of the stop bath that control is smeared to toner image by stop bath spreader portion (6a),
The second applying amount control part, the action of control stop bath spreader portion, so that the stop bath applying amount of the surface temperature of the pressure-producing part (40a) that detects by pressure-producing part temperature detecting part (35a) when being lower than second predetermined temperature, be that second predetermined temperature or its are many when above than the surface temperature of pressure-producing part (40a).
33. image processing system according to claim 25 is characterized in that,
Stop bath spreader portion (87),
Comprise: the toner amount test section that detects the toner amount in the toner image; With
Can partly change the stop bath applying amount control part of the applying amount of stop bath according to control signal from toner amount test section,
Be that scheduled volume or the toner image more than the scheduled volume are smeared stop bath only to the toner amount.
34. image processing system according to claim 25 is characterized in that, also comprises the stop bath insulation portion to the stop bath heat tracing.
35. image processing system according to claim 25 is characterized in that, stop bath contains increases the bonding agent of toner image to the adhesion of recording medium.
36. image processing system according to claim 25 is characterized in that, toner contains polyester as binder resin, and the glass transition temperature wax composition lower than polyester.
37. image processing system according to claim 25 is characterized in that, the volume average particle size of toner is 2 μ m～7 μ m.
38. image processing system according to claim 25 is characterized in that, stop bath also contains release agent.
39. an image processing system is characterized in that,
Have: the toner image formation portion (2) that forms toner image;
Intermediate transfer portion (63b), contain intermediate transfer medium (66), to be transfer printing form the first toner image carrier of the toner image that portion (2) forms by toner image to this intermediate transfer medium, it is made of material of impermeable stop bath on the surface at least, and described stop bath is by making toner softening and/or expand and make the toner image photographic fixing to recording medium;
Stop bath spreader portion (6b) forms the zone to the toner image of intermediate transfer medium (66) at least and smears stop bath;
Heating part (33), the toner image to middle offset medium (66) forms the zone heating at least; With
Transfer-fixing portion (77) arrives recording medium with the toner image transfer printing and the photographic fixing of having smeared stop bath,
Wherein, heating part (33), stop bath spreader portion (6b) and transfer-fixing portion (77) are set, so that carry out after by stop bath spreader portion (6b) the toner image forming area being smeared stop bath the heating of toner image forming area heating part (33), and, by heating part (33) to heating with the zone of recording medium butt in the middle offset medium (66).
40., it is characterized in that heating part (33) are the high temperature of glass transition temperature than the toner that forms toner image to the heating-up temperature of toner image according to the described image processing system of claim 39.
41., it is characterized in that heating part (33) are the high temperature of softening point than the toner that forms toner image to the heating-up temperature of toner image according to the described image processing system of claim 39.
42. according to the described image processing system of claim 39, it is characterized in that, also comprise stop bath insulation portion to the stop bath heat tracing.
43., it is characterized in that stop bath contains increases the bonding agent of toner image to the adhesion of recording medium according to the described image processing system of claim 39.
44., it is characterized in that toner contains polyester as binder resin, and the glass transition temperature wax composition lower than polyester according to the described image processing system of claim 39.
45., it is characterized in that the volume average particle size of toner is 2 μ m～7 μ m according to the described image processing system of claim 39.
46., it is characterized in that stop bath also contains release agent according to the described image processing system of claim 39.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004366283 | 2004-12-17 | ||
| JP2004366283 | 2004-12-17 | ||
| JP2005332022 | 2005-11-16 |
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| CN1790183A true CN1790183A (en) | 2006-06-21 |
| CN100449420C CN100449420C (en) | 2009-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101339339A Expired - Fee Related CN100449420C (en) | 2004-12-17 | 2005-12-19 | Image forming apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501888A (en) * | 2018-05-17 | 2019-11-26 | 柯尼卡美能达株式会社 | Image forming apparatus and recording medium |
| CN110865526A (en) * | 2018-08-27 | 2020-03-06 | 富士施乐株式会社 | Image forming apparatus with a toner supply device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6612636B2 (en) * | 2016-02-01 | 2019-11-27 | 株式会社ミヤコシ | Wet development equipment |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3042414B2 (en) * | 1996-08-13 | 2000-05-15 | 富士ゼロックス株式会社 | Image forming apparatus and image forming method |
| JP2000293050A (en) * | 1999-04-05 | 2000-10-20 | Canon Inc | Image forming device |
| US6594463B2 (en) * | 2001-08-23 | 2003-07-15 | Kabushiki Kaisha Toshiba | Image forming apparatus and method with intermediate transfer member |
| JP4009513B2 (en) * | 2002-09-20 | 2007-11-14 | 株式会社リコー | Fixing apparatus and image forming apparatus |
| JP4354164B2 (en) * | 2002-09-20 | 2009-10-28 | 株式会社リコー | Image forming apparatus |
| JP4056853B2 (en) * | 2002-11-01 | 2008-03-05 | 株式会社リコー | Heat fixing device |
| JP3872030B2 (en) * | 2003-03-27 | 2007-01-24 | 株式会社リコー | Fixing method, fixing device, and image forming apparatus |
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2005
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501888A (en) * | 2018-05-17 | 2019-11-26 | 柯尼卡美能达株式会社 | Image forming apparatus and recording medium |
| CN110501888B (en) * | 2018-05-17 | 2022-04-08 | 柯尼卡美能达株式会社 | Image forming apparatus and recording medium |
| CN110865526A (en) * | 2018-08-27 | 2020-03-06 | 富士施乐株式会社 | Image forming apparatus with a toner supply device |
| CN110865526B (en) * | 2018-08-27 | 2024-03-08 | 富士胶片商业创新有限公司 | Image forming apparatus having a plurality of image forming units |
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| CN100449420C (en) | 2009-01-07 |
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