CN104834194A - Image forming apparatus - Google Patents
Image forming apparatus Download PDFInfo
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- CN104834194A CN104834194A CN201410643078.5A CN201410643078A CN104834194A CN 104834194 A CN104834194 A CN 104834194A CN 201410643078 A CN201410643078 A CN 201410643078A CN 104834194 A CN104834194 A CN 104834194A
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- China
- Prior art keywords
- toner
- image
- image forming
- toner image
- sheet element
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
- G03G15/0105—Details of unit
- G03G15/0131—Details of unit for transferring a pattern to a second base
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
- G03G15/0142—Structure of complete machines
- G03G15/0178—Structure of complete machines using more than one reusable electrographic recording member, e.g. one for every monocolour image
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6582—Special processing for irreversibly adding or changing the sheet copy material characteristics or its appearance, e.g. stamping, annotation printing, punching
- G03G15/6585—Special processing for irreversibly adding or changing the sheet copy material characteristics or its appearance, e.g. stamping, annotation printing, punching by using non-standard toners, e.g. transparent toner, gloss adding devices
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
- G03G15/0142—Structure of complete machines
- G03G15/0178—Structure of complete machines using more than one reusable electrographic recording member, e.g. one for every monocolour image
- G03G15/0189—Structure of complete machines using more than one reusable electrographic recording member, e.g. one for every monocolour image primary transfer to an intermediate transfer belt
Abstract
An image forming apparatus includes a first image forming portion that uses toner containing flat pigment; a second image forming portion that uses toner not containing the flat pigment; and a toner image carrier that carries a first toner image that is formed in the first image forming portion and a second toner image that is formed in the second image forming portion. The image forming apparatus has a mode in which a relationship Am<Ac is satisfied, where Am denotes a number of toner layers of the first toner image that is carried by the toner image carrier, and Ac denotes the number of toner layers of the second toner image that is carried by the toner image carrier.
Description
Technical field
The present invention relates to a kind of image forming apparatus.
Background technology
Japanese Unexamined Patent Application 2006-317632 publication discloses a kind of image forming apparatus, and this image forming apparatus is by be laid in the blonde shades developed on photoreceptor agent image and other shade of color agent images on image-carrier and process fixing for toner image is formed image.In this prior art, blonde shades agent image is laid on the toner image of other colors on image-carrier.
Japanese Unexamined Patent Application 2006-317633 publication discloses a kind of image forming apparatus, this image forming apparatus is laid on middle transfer body by the toner image of all colours by comprising golden and other colors (they develop on the photoreceptor that xerography can be utilized to be formed comprise the image forming apparatus of the image of golden image), the toner image of all colours is transferred to image-carrier and by process fixing for toner image to form image.In this prior art, after blonde shades agent image (this image is the image utilizing blonde shades agent to be formed) is transferred on middle transfer body, the toner image that at least one toner utilized outside blonde shades agent is formed is laid on blonde shades agent image.
Summary of the invention
Thus, the object of the invention is with the flat granules of pigments of following arranged in orientation composing images, that is, make the flat surfaces of described flat granules of pigments be parallel to the plane of recording medium.
According to a first aspect of the invention, provide a kind of image forming apparatus, this image forming apparatus comprises: the first image forming portion using the toner containing flat pigment; Use not containing the second image forming portion of the toner of flat pigment; With toner image carrier, this toner image carrier is carried on the first toner image formed in described first image forming portion and the second toner image formed in described second image forming portion.Described image forming apparatus has the pattern meeting relation Am<Ac, wherein Am represents the toner number of plies of described first toner image carried by described toner image carrier, and Ac represents the toner number of plies of described second toner image carried by described toner image carrier
According to a second aspect of the invention, provide a kind of image forming apparatus, this image forming apparatus comprises: the first image forming portion using the toner containing flat pigment; Use not containing the second image forming portion of the toner of flat pigment; And fixation part, this fixation part by the first toner image formed in described first image forming portion and the second toner image of being formed in described second image forming portion fixing on recording medium.Described image forming apparatus has the pattern meeting relation Bm>Bc, wherein Bm represents the glossiness of fixing described first toner image to described recording medium in described fixation part, and Bc represents the glossiness of fixing described second toner image to described recording medium in described fixation part.
According to a third aspect of the invention we, provide a kind of image forming apparatus according to first aspect, wherein, described first image forming portion and described second image forming portion include the latent image carrier for forming toner image; And wherein, set toner number of plies Am and Ac by the unit area toner quality controlled in the toner image on each latent image carrier, make it meet described relation Am<Ac.
According to a forth aspect of the invention, provide a kind of image forming apparatus according to second aspect, wherein, set described glossiness Bm and Bc by the unit area toner quality controlled in the toner image on described recording medium, make it meet described relation Bm>Bc.
According to a fifth aspect of the invention, provide a kind of image forming apparatus according to the third aspect, wherein, described first image forming portion and described second image forming portion include developing member, this developing member by the image development be formed on described latent image carrier to obtain toner image; And wherein, by changing the unit area toner quality in toner image that the electromotive force being applied to the developing bias voltage of described developing member controls on described latent image carrier.
According to a first aspect of the invention, compared with the situation being Am >=Ac with the pass wherein between Am and Ac, can by the flat granules of pigments of composing images with the arranged in orientation making their flat surfaces be parallel to the plane of recording medium.
According to a second aspect of the invention, compared with the situation being Bm≤Bc with the pass wherein between Bm and Bc, can by the flat granules of pigments of composing images with the arranged in orientation making their flat surfaces be parallel to the plane of recording medium.
According to a third aspect of the invention we, compared with the situation of the unit area toner quality in the toner image do not controlled on latent image carrier, toner number of plies Am and Ac can be easily made to meet relation Am<Ac.
According to a forth aspect of the invention, compared with the situation of the unit area toner quality in the toner image do not controlled on recording medium, glossiness Bm and Bc can be easily made to meet relation Bm>Bc.
According to a fifth aspect of the invention, with do not control the developing bias voltage being applied to developing member electromotive force situation compared with, easily can control the unit area toner quality in the toner image on latent image carrier.
Accompanying drawing explanation
Illustrative embodiments of the present invention will be described in detail based on accompanying drawing, wherein:
Fig. 1 shows the schematic diagram of the total structure of the image forming apparatus according to this illustrative embodiments;
Fig. 2 shows the schematic diagram formed according to the structure of the image forming part of the image formation unit of this illustrative embodiments;
Fig. 3 shows the schematic diagram formed according to the structure of the toner image forming section of the image formation unit of this illustrative embodiments;
Fig. 4 A is the figure of the number of plies for illustration of metallochrome toner, and Fig. 4 B is the figure of the number of plies of toner for illustration of another kind of color;
Fig. 5 is schematic diagram, and the less and reflecting surface that is flat granules of pigments of the number of plies that the schematic shows metallochrome toner has and do not overlap each other and the ideal orientation be arranged in parallel with the plane of sheet element;
Fig. 6 is schematic diagram, the more and reflecting surface that is flat granules of pigments of the number of plies that the schematic shows metallochrome toner be positioned at wherein they disorderly towards the orientation in the direction crossing with the direction of the plane being parallel to sheet element;
Fig. 7 is the expression formula for calculating dynamic guide number (FI);
Fig. 8 shows the curve map of FI relative to normal reflection rate;
Fig. 9 shows the curve map of FI relative to the mass area ratio of metallochrome toner;
Figure 10 shows for the curve map of glossiness metallochrome toner and other shade of color agent relative to mass area ratio;
Figure 11 A shows the less schematic diagram of the mass area ratio of the metallochrome toner on sheet element; Figure 11 B shows the mass area ratio of metallochrome toner than the large schematic diagram in Figure 11 A, and Figure 11 C shows the mass area ratio of metallochrome toner than the large schematic diagram in Figure 11 B; And
Figure 12 A shows the less schematic diagram of the mass area ratio of other shade of color agent on sheet element; Figure 12 B shows the mass area ratio of the toner of other colors than the large schematic diagram in Figure 12 A, and Figure 12 C shows the mass area ratio of the toner of other colors than the large schematic diagram in Figure 12 B.
Embodiment
Illustrative embodiments of the present invention is described below with reference to the accompanying drawings.First, by the total structure of Description Image forming device and operation.Then, the relevant portion of this illustrative embodiments will be described.Note, in the following description, " device height direction " is the direction represented by the arrow H in Fig. 1, and " plant width direction " is the direction represented by the arrow W in Fig. 1.The direction vertical with both plant width directions with device height direction is " the equipment depth direction " that represented by arrow D.
[total structure of image forming apparatus]
Fig. 1 is the front schematic view of the total structure of image forming apparatus 10 according to this illustrative embodiments.As shown in Figure 1, this image forming apparatus 10 comprises: use electrophotographic system on the sheet element P of the example as recording medium, form the image forming part 12 of image; The medium transport part 50 of feeding sheets component P; With the aftertreatment portion 60 carrying out aftertreatment on the sheet element P forming image.Image forming apparatus 10 comprises controller 70 and power supply unit 80 further.Controller 70 controls power supply unit 80 and each portion described above and part.Power supply unit 80 is to the above-mentioned each portion and the energize portions that comprise controller 70.
The structure > of < image forming part
Diagrammatically illustrate from the image forming part 12 when seeing above, by Description Image forming portion 12 with reference to Fig. 2, Fig. 2.Image forming part 12 comprise as the photosensitive drums 21 of the example of latent image carrier, charger 22, exposure device 23, developing apparatus 24, cleaning device 25, formed toner image toner image forming section 20 (see also Fig. 3), the toner image formed by toner image forming section 20 is transferred to transfer device 30 on sheet element P and by fixing device 40 fixing for the toner image that is transferred on sheet element P.
Toner image forming section 20 is configured to the toner image forming respective color.In this illustrative embodiments, be provided with six the toner image forming sections 20 corresponding with the first special color V, the second special color W, yellow Y, magenta M, cyan C and black K.Alphabetical V, W, Y, M, C and K appended after the Reference numeral used in Fig. 1 and 2 represent above-mentioned color.The toner image of these six kinds of colors is transferred to the intermediate transfer belt 31 as the example of toner image carrier in superimposed manner, and the toner image of these six kinds of colors is transferred to sheet element P at transfer printing occlusal area NT place by transfer device 30.
In this illustrative embodiments, the first special color V is that the metallochrome for adding metallic luster to image is adjusted, and the second special color W enterprise's color that to be the user that frequently uses than other colors special.The toner of each color will be described below.
(photosensitive drums)
As shown in Figures 2 and 3, photosensitive drums 21 is columniform, and is configured to be rotated by the axle of drive unit (not shown) around self.Photosensitive drums 21 such as has electronegative photographic layer on its external peripheral surface.Photosensitive drums 21 can also have the outer covering layer be positioned on its external peripheral surface.These photosensitive drums 21 of answering with each Color pair viewed from front time on plant width direction along straight line.
(charger)
Charger 22 fills negative charge to the external peripheral surface (photographic layer) of photosensitive drums 21.In this illustrative embodiments, charger 22 is grid corona tube chargers of corona discharge type (noncontact type).
(exposure device)
Exposure device 23 forms electrostatic latent image on the external peripheral surface of photosensitive drums 21.More particularly, according to the view data received from the image signal processing unit forming controller 70, exposure device 23 irradiates to the external peripheral surface of the photosensitive drums 22 of having been charged by charger 22 the exposure light L (see Fig. 3) modulated.When being irradiated exposure light L by exposure device 23, the external peripheral surface of photosensitive drums 21 defines electrostatic latent image.In this illustrative embodiments, the laser beam that exposure device 23 is launched from light source by the surface scan that uses the light scanning apparatus (optical system) including polygon mirror and F θ lens to cross the photosensitive drums 21 and external peripheral surface of photosensitive drums 21 is exposed.In this illustrative embodiments, each color is provided with exposure device 23.
(developing apparatus)
The latent electrostatic image developing be formed on the external peripheral surface of photosensitive drums 21 is formed toner image by utilizing the developer G containing toner by developing apparatus 24 on the external peripheral surface of photosensitive drums 21.Although will not provide detailed description here, developing apparatus 24 all at least comprises the container 241 of receiving photographic developer G and the developer G in container 241 is supplied to the developer roll 242 of photosensitive drums 21 while rotating.Toner cartridge 27 is connected to container 241 with supply developer G by feed lines (not shown).The plant width direction of the toner cartridge 27 of answering with each Color pair in front elevation is arranged side by side in above photosensitive drums 21 and exposure device 23 and also can changes independently.
In addition, developing bias voltage is applied to developer roll 242.Developing bias voltage is applied to the voltage between photosensitive drums 21 and developer roll 242.By applying developing bias voltage, between developer roll 242 and photosensitive drums 21, producing potential difference (PD), result, is toner image by the latent electrostatic image developing in photosensitive drums 21.
(cleaning device)
Cleaning device 25 includes the scraper 251 struck off by the toner stayed on the surface of photosensitive drums 21 after being transferred to transfer device 30 at toner image.Although do not illustrate, cleaning device 25 also comprises the accommodation section (see Fig. 3) of the toner struck off for memory scraper 251 and the conveying device for the toner in accommodation section being delivered to useless toner case further.
(transfer device)
The toner image be formed in corresponding photosensitive drums 21 is transferred in transfer belt 31 by transfer device 30 in superimposed manner, and stacked toner image is secondarily transferred to (see Fig. 2) on sheet element P.
More particularly, as shown in Figure 2, transfer belt 31 has ring texture and reels around multiple roller 32, thus remains on certain position.In this illustrative embodiments, transfer belt 31 is retained inversion obtuse triangle shape elongated on the plant width direction that is formed in front elevation.In the middle of multiple roller 32, the roller 32D shown in Fig. 2 is used as driven roller, and this driven roller drives transfer belt 31 in the direction of arrow by using the driving force from motor (not shown).In addition, in the middle of multiple roller 32, the roller 32T shown in Fig. 2 is used as the idler roller applying tension force to transfer belt 31.In the middle of multiple roller 32, the roller 32B shown in Fig. 2 is used as the opposed roll of the second transfer roll 34.
Transfer belt 31 is in its upside extended on plant width direction and contacts with corresponding photosensitive drums 21 from below in above-mentioned position.When applying transfer printing bias-voltage from the first transfer roll 33, the toner image be formed in corresponding photosensitive drums 21 is transferred to transfer belt 31.In addition, the summit, lower obtuse angle of transfer belt 31 contacts with the second transfer roll 34, thus forms transfer printing occlusal area NT.When applying transfer printing bias-voltage from the second transfer roll 34, the toner image on it is transferred to the sheet element P through transfer printing occlusal area NT by transfer belt 31.
(fixing device)
As shown in Figure 2, the toner image being transferred to sheet element P in transfer device 30 is fixed on sheet element P by fixing device 40.
Fixing device 40 applies heat and pressure and by fixing for toner image to sheet element P by the fixing occlusal area NF place between the fixing band 411 being formed in pressure roll 42 and reel around multiple roller 413 to toner image.Roller 413H is warm-up mill, and this warm-up mill is such as had internal heater and rotated by the driving force from the transmission of motor (not shown).By this structure, fixing band 411 rotates along arrow R direction.
< medium transport part >
The medium deliverying unit 54 that sheet element P discharges after comprising the medium feed unit 52 that sheet element P is fed to image forming part 12 and form image on sheet element P by medium transport part 50.Medium transport part 50 comprises the intermediate transfer section 58 that the medium used when the two sides at sheet element P being formed image returns unit 56 and sheet element P is transported to fixing device 40 from transfer device 30 further.
Sheet element P to be fed to the transfer printing occlusal area NT in image forming part 12 by medium feed unit 52 one by one according to transfer printing timing.Medium output unit 54 has the sheet element P of toner image to discharge from equipment by fixing in fixing device 40.When will one side fixing have the another side of the sheet element P of toner image forms image time, medium return unit 56 by sheet element P overturn and it is delivered to image forming part 12 (medium feed unit 52) to feedback.
< aftertreatment portion >
As shown in Figure 1, aftertreatment portion 60 comprises: medium cooling unit 62, and the sheet element P being formed with image in image forming part 12 cools by it; Coalignment 64, it is by curling sheet element P alignment; With image inspection part 66, it checks the image be formed on sheet element P.The element in aftertreatment portion 60 is arranged in the medium deliverying unit 54 of medium transport part 50.
Form the medium cooling unit 62 in aftertreatment portion 60, coalignment 64 and image inspection part 66 to be sequentially arranged in medium deliverying unit 54 from upstream side in sheet material discharge direction, and carry out above-mentioned aftertreatment on the sheet element P just discharged by medium deliverying unit 54.
[image forming operation]
Next, formed being described through image that image forming apparatus 10 carries out on sheet element P and the summary of last handling process subsequently.
As shown in Figure 1, when receiving image and forming instruction, controller 70 starts toner image forming section 20, transfer device 30 and fixing device 40.As a result, photosensitive drums 21 and developer roll 242 rotate, and transfer belt 31 is driven.In addition, pressure roll 42 rotates, and fixing band 41 is driven.Controller 70 also synchronously starts medium transport part 50 etc. with the operation of these parts.
As a result, corresponding photosensitive drums 12 is charged by charger 22 while rotation.In addition, the view data processed in image signal processing unit is sent to corresponding exposure device 23 by controller 70.Exposure device 23 launches exposure light L to expose the charged photosensitive drums 21 of correspondence according to view data.As a result, the external peripheral surface of photosensitive drums 21 forms electrostatic latent image.The electrostatic latent image be formed in corresponding photosensitive drums 21 utilizes the developer supplied from developing apparatus 24.Like this, the photosensitive drums 21 of correspondence is formed the toner image of the first special color V, the second special color W, yellow Y, magenta M, cyan C and black K.
The toner image being formed in the respective color in corresponding photosensitive drums 21 is standing through the first corresponding transfer roll 33 transfer belt 31 that transfer printing bias-voltage is sequentially transferred to operation.Like this, transfer belt 31 is formed the stacked toner image that the toner image of six kinds of colors is stacked on top of each other.Stacked toner is transported to transfer printing occlusal area NT by the transfer belt 31 run.Sheet element P is fed to transfer printing occlusal area NT according to the conveying timing of stacked toner image by medium feed unit 52.By applying transfer printing bias-voltage at transfer printing occlusal area NT place, stacked toner image is transferred to sheet element P by from transfer belt 31.
While being subject to negative-pressure ward, to be transported to the fixing occlusal area NF in fixing device 40 from the transfer printing occlusal area NT transfer device 30 by intermediate transfer section 58 transferred with the sheet element P of toner image.Fixing device 40 applies heat and pressure (fixing energy) to the sheet element P through fixing occlusal area NF.Like this, the toner image be transferred on sheet element P is fixed.
The sheet element P discharged from fixing device 40 is processed by aftertreatment portion 60 while the discharge medium receiving unit being transported to device external by medium deliverying unit 54.First cooled by medium cooling unit 62 by the sheet element P heated in fixing, then by coalignment 64 alignment.The fixing toner image to sheet element P is checked for whether there is toner defect density, image deflects, picture position defect and these defect rank by image inspection part 66.Finally, sheet element P is discharged on medium deliverying unit 54.
When also forming image on the non-image surface of sheet element P (namely not having the surface of image) (when will carry out duplex printing), the transport path through the sheet element P of image inspection part 66 is switched to medium from medium deliverying unit 54 and returns unit 56 by controller 70.As a result, sheet element P is reversed and is fed to medium feed unit 52.Then, on the back side of sheet element P, (fixing) image is formed by the image forming course identical with the process of carrying out on the front of sheet element P.Then, after image is formed, sheet element P is through the last handling process identical with the process of carrying out on the front of sheet element P, and is discharged to device external by medium deliverying unit 54.
The structure > of < associated components
Next the toner used in this illustrative embodiments will be described in.
As shown in Figure 4, the overall shape of the toner particles Gm (hereinafter referred to as " metallochrome toner particles Gm ") of the metal color as the first special color V and containing flat granules of pigments 120 is flat-disk shape.Metallochrome toner particles Gm is made up of adhesive resin (such as styrene-acrylic resin) and laminar flat granules of pigments 120, and inside is added with charge control agent (not shown) etc.In Figure 4 A, metallochrome toner particles Gm schematically shows with rectangular shape, thus makes it possible to them and other shade of color agent particles Gc described below easily to distinguish.
Flat granules of pigments 120 according to this illustrative embodiments is formed by the flat aluminium of flake.More specifically, when watching from side, arrange that flat granules of pigments 120 on flat surfaces has in the lateral direction than flat pattern large in the vertical direction.In addition, flat granules of pigments 120 has a pair upper and lower in Figure 4 A reflecting surface (flat surfaces) 120A.
By being included in the reflecting surface 120A place reflected light of the flat granules of pigments 120 in metallochrome toner particles Gm, adding metallic luster to the image utilizing metallochrome toner particles Gm to be formed.
As shown in Figure 4 B, toner particles Gc (hereinafter referred to as " other shade of color agent particles Gc ") as the second special color W, yellow Y, magenta M, cyan C and black K and not containing the color outside the metal color of flat granules of pigments 120 (see Fig. 4 A) has profiled shape, such as substantially spherical or white potato shaped.Other shade of color agent particles Gc is formed by the pigment outside the adhesive resin of such as styrene-acrylic resin and so on and flat pigment, and inside is added with charge control agent (not shown) etc.Note, although there is spheroid form in other shade of color agent particles Gc is shown schematically as in figure 4b side view, as mentioned above, in fact they have such as substantially spherical or white potato shaped and so on profiled shape.
Note, other shade of color agent particles Gc must not have such as substantially spherical or white potato shaped and so on profiled shape, but can have the profiled shape being similar to and pulverizing toner.
(the first relevant piece construction)
Description first to be correlated with piece construction.
The toner image utilizing metallochrome toner particles Gm to be formed is formed in the photosensitive drums 21 of the toner image forming section 20V corresponding with the first special color V (metallochrome).On the other hand, the toner image utilizing other shade of color agent particle Gc to be formed is formed on the toner image forming section 20W corresponding with the second special color W beyond the first special color V, yellow Y, magenta M, cyan C and black K, the photosensitive drums 21W of 20Y, 20M, 20C and 20K, 21Y, 21M, 21C and 21K.First toner image in corresponding photosensitive drums 21 is transferred in transfer belt 31 by transfer device 30.
Image forming apparatus 10 has the pattern meeting Am<Ac, wherein Am represents the toner number of plies of the toner image utilizing metallochrome toner particles Gm (as shown in Figure 4 A) to be formed be transferred in transfer belt 31, and Ac represents the toner number of plies of the toner image utilizing other shade of color agent particle Gc (as shown in Figure 4 B) to be formed be transferred in transfer belt 31.
In addition, in this illustrative embodiments, the toner number of plies Am in the toner image utilizing metallochrome toner particles Gm to be formed is configured to the value close to 1.
Regulated the unit area toner quality of the toner image photosensitive drums 21 by the quantity of electric charge (charge characteristic) changing the intensity of the exposure light L launched from the exposure device shown in Fig. 3, the electromotive force being applied to the developing bias voltage of the developer roll 242 of developing apparatus 24 and toner, the toner number of plies Am in transfer belt 31 and Ac is set to meets relation Am<Ac whereby.Note, photosensitive drums 21 can meet relation Am<Ac.
In addition, when the image area number percent in the electrostatic latent image in photosensitive drums 21 is 100%, toner number of plies Am and Ac is configured to meet relation Am<Ac.In addition, even if when the image area number percent in the electrostatic latent image in photosensitive drums 21 is less than 100%, if metallochrome toner particles Gm is identical with the image area number percent of other shade of color agent particles Gc, then toner number of plies Am and Ac also can be configured to meet relation Am<Ac.Note, image area number percent refers to the area percentage occupied by toner image.
When image area number percent is 100%, in toner image, the toner number of plies Am of unit area and Ac can be limited by (m/mt)/(1/S), wherein m is toner mass area ratio, mt is the average quality of each toner particles, and S is averaging projection's area of each toner particles.
Note, when the shape of toner is similar to spheroid or disc-shape and when the medium particle diameter of toner is 2r, can from area (the π r justified
2) obtain the averaging projection area S of each toner particles.The charge amount distribution measuring equipment (E-SPART ANALYZER) manufactured by HosokawaMicron company, the medium particle diameter 2r being measured toner by the Multisizer etc. of Beckman Coulter company manufacture can be used.
Alternatively, can by taking out and utilizing the transfer belt 31 of microscopic examination carrying toner image or photosensitive drums 21 to know toner number of plies Am and Ac.
< operates >
Next, description first to be correlated with the operation of piece construction.
As shown in Figure 1, when the image that (in the pattern of metallic luster at least partially giving image) sends the metallic luster at least partially giving image forms instruction, the toner image forming section 20V (i.e. the example of first image forming portion) corresponding with metal color is activated.
More particularly, the surface of photosensitive drums 21V forms the electrostatic latent image corresponding with the part of the image that will be given metallic luster.That is, when whole image metallic luster will be given, the whole surface of photosensitive drums 21V forms electrostatic latent image, and when giving a part of metallic luster of image, forms the electrostatic latent image corresponding with this part.
The electrostatic latent image be formed on photosensitive drums 21V utilizes the developer containing metal color toner particles Gm (see Fig. 5 etc.) supplied from developing apparatus 24V.Like this, photosensitive drums 21V forms metallochrome toner image.
This metallochrome toner image is transferred in the transfer belt 31 of operation, and other shade of color agent images are sequentially transferred in this transfer belt 31 subsequently.Like this, transfer belt 31 is formed the stacked toner image that the toner image of six kinds of colors is stacked on top of each other.This stacked toner image is transferred to sheet element P at transfer printing occlusal area NT from transfer belt 31.
To be transported to the fixing occlusal area NF in fixing device 40 from the transfer printing occlusal area NT transfer device 30 by intermediate transfer section 58 transferred with the sheet element P of toner image.Fixing device 40 applies heat and pressure to the sheet element P through fixing occlusal area NF.Like this, the toner image being transferred to sheet element P is fixed.
Here, the relation between metallic luster (namely reflectivity is to the correlativity of angle) and the toner number of plies given by metallochrome toner particles Gm will be described.Fig. 5 and 6 diagrammatically illustrates the fixing toner image utilizing metallochrome toner particles Gm to be formed to sheet element P.Although the adhesive resin part be included in toner particles merges in practice, in order to easy understand, they illustrate in independent mode in figs. 5 and 6.In addition, other shade of color agent particles Gc is not shown.
In order to strengthen the metallic luster obtained by metallochrome toner particles Gm, the dynamic guide number (FI) shown in Fig. 7 must be increased, that is, normal reflection rate (L* must be increased
15 °) and reduce diffuse reflectance (L*
110 °).This can to increase from FI as shown in Figure 8 along with the increase of normal reflection rate understands.
More particularly, as shown in Figure 5, when the number of plies Am of metallochrome toner particles less even close to 1 time, the orientation of toner particles is high.Therefore, the reflecting surface 120A of flat granules of pigments 120 may have ideal orientation, and under this ideal orientation, described granules of pigments 120 is not arranged in parallel with the plane P A of sheet element P with overlapping each other.Because the reflecting surface 120A of flat granules of pigments 120 has such ideal orientation, namely described granules of pigments 120 is not arranged with the plane P A of sheet element P with overlapping each other abreast, and light reflects in the same direction, thus adds normal reflection rate (L*
15 °) and reduce diffuse reflectance (L*
110 °), thus, enhance metallic luster (adding FI).
But as shown in Figure 6, when the number of plies Am of metallochrome toner particles Gm is larger, the orientation of toner particles is little.Therefore, the reflecting surface 120A of flat granules of pigments 120 may have such orientation, wherein they while overlapping each other towards the various directions crossing with the direction of the plane P A being parallel to sheet element P.Due to the various directions that the reflecting surface 120A of flat granules of pigments 120 is crossing towards the direction parallel with the plane P A of sheet element P while overlapping each other, light is reflected along unordered direction, thus reduces normal reflection rate (L*
15 °) and increase diffuse reflectance (L*
110 °), thus decrease metallic luster (reducing FI).
In this illustrative embodiments, relation between Am and Ac (Am represents the toner number of plies of the toner image utilizing metallochrome toner particles to be formed in transfer belt 31, and Ac represents the toner number of plies of the toner image utilizing other shade of color agent particle Gc to be formed in transfer belt 31) is set to Am<Ac.Compared with the situation being Am>=Ac with the pass wherein between Am and Ac, the reflecting surface 120A of flat granules of pigments 120 may have ideal orientation, in this ideal orientation, described granules of pigments 120 is arranged in single layer along the direction parallel with the plane P A of sheet element P, as shown in Figure 5, because this increasing normal reflection rate (L*
15 °) and reduce diffuse reflectance (L*
110 °), because this enhancing metallic luster.In addition, because the toner number of plies Am of the toner image utilizing metallochrome toner particles Gm to be formed is set to the value close to 1, therefore more the ideal orientation shown in Fig. 5 may be realized.
This describes from different angles.That is, control toner number of plies Am and Ac, make them meet relation Am<Ac, thus the flat granules of pigments 120 comprised in metallochrome toner particles Gm has the ideal orientation shown in Fig. 5, strengthens metallic luster whereby.
In addition, when the image area number percent in the electrostatic latent image being formed in photosensitive drums 21 with other shade of color agent particles Gc when utilizing metallochrome toner particles Gm is identical, be arranged to meet Am<Ac.Thus, compared with not meeting the situation of Am<Ac, normal reflection rate (L*
15 °) be retained as higher.In other words, even if when gray scale (intensity of image shade) changes, the change of metallic luster also can be suppressed.
Fig. 9 shows the curve map of the mass area ratio of the metallochrome toner particles Gm on FI and fixing sheet element P before.As shown in this curve map, when unit area toner quality is about 4.0g/mm
2time FI the highest, and when unit area toner quality be 5.0g/mm
2time, FI is lower.As mentioned above, because the toner number of plies is limited by (m/mt)/(1/S), so toner number of plies Am increases along with the increase of unit area toner quality m.
Although can adopt any method to measure in the toner image on sheet element P unit area toner quality m, an example of measuring method will be described below.
First, by the filled type patch image (image area: 100%) export and be transferred to sheet element P of 20mm × 50mm.Then, the removable vacuum head being connected to vacuum machine is used the toner particles vacuum of the unfixed toner image filling in patch image to be siphoned away.
Collected by filtrator by the toner that vacuum siphons away, and the mass M of toner collected by measuring.
Then, by by the mass M of collected toner divided by area (20mm × 50mm), calculate the unit area toner quality m in the toner image of sheet element P.
(the second relevant piece construction)
Next, description second to be correlated with piece construction.Note, will the identical description of piece construction relevant with first be omitted.
Image forming apparatus 10 has the pattern meeting Bm>Bc, wherein Bm represents the glossiness (gloss ratings) utilizing metallochrome toner particles Gm to be formed in image on sheet element P and fixing in fixing device 40, and Bc represents the glossiness (gloss ratings) utilizing other shade of color agent particle Gc to be formed in image on sheet element P and fixing in fixing device 40.
Note, meet Bm>Bc like this, namely the quantity of electric charge (charge characteristic) by changing the intensity of exposure light L of launching from the exposure device 23 shown in Fig. 3, the electromotive force being applied to the developing bias voltage of the developer roll 242 of developing apparatus 24 and toner regulates the unit area toner quality photosensitive drums 21, and the thus final unit area toner quality m regulated before being transferred on sheet element P in toner image.
The unit area toner quality m of the toner image on sheet element P can use measuring method described above to measure.In addition, the glossiness of the image on sheet element P can use glossiness measuring equipment to measure.In this example, gloss when using Byk Gardner miniature triangle glossometer to test 60 °.
About glossiness (gloss ratings), Japanese Industrial Standards (JIS) specifies, the glass surface in whole visible wavelength region with the refractive index of 1.567 has the gloss ratings of 100%.In addition, JIS be defined in refractive index be 1.567 glass surface on 60 ° of incident angles, the gloss ratings of reflectivity to be 10% be 100 (%), and with the incident angle of 20 °, reflectivity to be 5% be 100% gloss ratings.According to JIS, glossiness (gloss ratings) number percent or numeral represent.In addition, must indicate in principle and take measurement of an angle and the manufacturer of measuring equipment and type
< advantage >
Next, description second to be correlated with the operation of piece construction.
In the pattern of metallic luster at least partially giving image, when the image sending the metallic luster at least partially giving image forms instruction, the toner image forming section 20V (i.e. the example of first image forming portion) corresponding with metal color runs.
To be transported to the fixing occlusal area NF in fixing device 40 from the transfer printing occlusal area NT transfer device 30 by intermediate transfer section 58 transferred with the sheet element P of toner image.Fixing device 40 applies heat and pressure to the sheet element P through fixing occlusal area NF.Like this, by fixing for the toner image being transferred to sheet element P.
Now, metallic luster (namely reflectivity is to the correlativity of angle) and the glossiness (gloss ratings) of metallochrome toner particles Gm will be described.The toner image that Figure 11 A to 11C and 12A to 12C diagrammatically illustrates the fixing toner image utilizing metallochrome toner particles Gm to be formed respectively to sheet element P and utilizes other shade of color agent particle Gc to be formed.Although adhesive resin part contained in these toner particles is merged in practice, in order to easy understand, they illustrate in the mode of separating in figs. 11 and 12.
As mentioned above, in order to strengthen the metallic luster obtained by metallochrome toner particles Gm, the FI shown in Fig. 7 must be increased, that is, normal reflection rate (L* must be increased
15 °) and reduce diffuse reflectance (L*
110 °).
As shown in figures 11 a and 12, when the unit area toner quality m in the toner image on fixing sheet element P is before less, Existential Space between toner particles, sheet element P exposes to the open air.Therefore, as shown in Figure 10, the glossiness Bm of metallochrome toner particles Gm and the glossiness Bc of other shade of color agent particles Gc is less.In addition, as shown in Figure 11 A, although light is reflected in the same direction, the intensity of reflected light is not enough due to the space between toner particles.Thus metallic luster is not high enough.
When metallochrome toner particles Gm, as shown in Figure 11 B, when the unit area toner quality m in the toner image on sheet element P is than time large shown in Figure 11 A, the reflecting surface 120A of the flat granules of pigments 120 in metallochrome toner particles Gm almost has plane P A along sheet element P with the ideal orientation of monolayer alignment.As a result, light reflects in the same direction, thus adds normal reflection rate (L*
15 °) and reduce diffuse reflectance (L*
110 °).In addition, without any space between toner particles, the intensity of reflected light is sufficient.Therefore, metallic luster (FI is higher) is enhanced.In addition, because surface is smooth, glossiness increases, as shown in Figure 10.
When metallochrome toner particles Gm, when the unit area toner quality m in the toner image on sheet element P increases further, as shown in Figure 11 C, the reflecting surface 120A of the flat granules of pigments 120 in metallochrome toner particles Gm has the orientation towards the various directions crossing with the direction of the plane P A being parallel to sheet element P.As a result, light reflects on unordered direction, thus reduces normal reflection rate (L*
15 °) and add diffuse reflectance (L*
110 °).Thus, metallic luster reduces (FI reduction).In addition, because surface is not smooth, glossiness Bm reduces, as shown in Figure 10.
When other shade of color agent particle Gc, as shown in Figure 12 B, when the unit area toner quality m in the toner image on sheet element P increases, the space between toner particles almost disappears.But because the smoothness on surface reduces, glossiness Bc is not high enough, as shown in Figure 10.
When other shade of color agent particle Gc, when the unit area toner quality m in the toner image on sheet element P increases further, as indicated in fig. 12 c, the space between toner particles disappears, thus makes smooth surface.Therefore, as shown in Figure 10, glossiness Bc increases.
As mentioned above, the glossiness of metallochrome toner particles Gm has peak value (in the example of Figure 10, when unit area toner quality m arrives 3g/mm relative to unit area toner quality m
2time, glossiness reaches peak value), and the glossiness of other shade of color agent particles Gc increases along with the increase of unit area toner quality m.
Relation between Bm and Bc (Bm represents the glossiness (gloss ratings) utilizing metallochrome toner particles Gm to be formed in image on sheet element P and fixing in fixing device 40, and Bc represents the glossiness (gloss ratings) utilizing other shade of color agent particle Gc to be formed in image on sheet element P and fixing in fixing device 40) is set to Bm>Bc; That is, when the unit area toner quality m shown in Figure 10 is less than 4g/mm
2time, metallic luster higher (FI is higher) (state shown in Figure 11 A and 11B).But, when the pass between Bm and Bc is Bm≤Bc, namely when the unit area toner quality m shown in Figure 10 is more than or equal to 4g/mm
2time, metallic luster lower (FI is lower) (i.e. state shown in Figure 11 C).
Thus, made by setting image forming conditions (quantity of electric charge (charge characteristic) etc. of the intensity of exposure light L of launching from exposure device 23, the electromotive force being applied to the developing bias voltage of the developer roll 242 of developing apparatus 24, toner) to meet Bm>Bc fixing to the glossiness (gloss ratings) of image after sheet element P, increase metallic luster (FI increase).
Note, in this illustrative embodiments, the unit area toner quality m in the toner image utilizing metallochrome toner particles Gm to be formed on sheet element P is configured to make glossiness be arranged in the region S (i.e. state shown in Figure 11 B) of Figure 10; More particularly, unit area toner quality m is set to be greater than or equals 2g/mm
2and be less than 4g/mm
2.
This describes from different angles, that is, by controlling the unit area toner quality m (such as by setting image forming conditions) on sheet element P, the glossiness (gloss ratings) of the image utilizing metallochrome toner particles Gm to be formed is made to reach peak value or the value close to peak value, or make glossiness exceed predetermined threshold, then can realize state shown in Figure 11 B (the reflecting surface 120A of the flat granules of pigments 120 in metallochrome toner particles Gm is in direction along the plane P A being parallel to sheet element P with the ideal orientation of monolayer alignment), increase metallic luster (increasing FI) thus.
Here, being set in of image forming conditions (quantity of electric charge (charge characteristic) etc. from the intensity of the exposure light L of exposure device 23 transmitting, the electromotive force being applied to the developing bias voltage of the developer roll 242 of developing apparatus 24, toner) can be different between metallochrome toner particles Gm and other shade of color agent particles Gc.Unit area toner quality m also can be different between metallochrome toner particles Gm and other shade of color agent particles Gc.Such as, the mass area ratio m of metallochrome toner particles Gm can be set as 3g/mm
2, and the mass area ratio m of other shade of color agent particles can be set as 5g/mm
2.
The invention is not restricted to above-mentioned illustrative embodiments.
In the first relevant piece construction, toner number of plies Am and Ac is set as meeting relation Am<Ac, and in the second relevant piece construction, glossiness Bm and Bc is configured to meet Bm>Bc.These conditions can meet simultaneously or individually meet.Image forming apparatus also has the pattern forming image when not arranging these conditions.
Note, although below described concrete illustrative embodiments of the present invention in detail, the invention is not restricted to this illustrative embodiments, those skilled in the art have been apparent that, within the scope of the invention, the present invention can have other illustrative embodiments various.Such as, in above-mentioned illustrative embodiments, although the toner image exemplarily describing each color is transferred to the situation of transfer belt 31 respectively, but the toner of each color can directly be transferred to sheet element P individually, or the toner image of each color can be unified to be transferred to transfer belt or sheet element P.
In addition, although metallochrome toner image and other shade of color agent images are by simultaneously fixing to sheet element P in above-mentioned illustrative embodiments, metallochrome toner image is fixing can carry out dividually to sheet element P He in other shade of color agent image fixing to sheet element P.
In order to the object illustrated with describe provide illustrative embodiments of the present invention in front description.Be not intended with disclosed concrete form limit the present invention, or the present invention is limited to disclosed concrete form.Obviously, to those skilled in the art, multiple modification and change can be apparent.In order to explain principle of the present invention and practical application thereof best and select and describe embodiment, thus enable those skilled in the art understand numerous embodiments of the present invention, and be susceptible to the multiple modification being suitable for embody rule.Scope of the present invention ought to be limited by claims and coordinator thereof.
Claims (5)
1. an image forming apparatus, this image forming apparatus comprises:
Use the first image forming portion of the toner containing flat pigment;
Use not containing the second image forming portion of the toner of flat pigment; With
Toner image carrier, this toner image carrier is carried on the first toner image formed in described first image forming portion and the second toner image formed in described second image forming portion,
Wherein, described image forming apparatus has the pattern meeting relation Am<Ac, wherein Am represents the toner number of plies of described first toner image carried by described toner image carrier, and Ac represents the toner number of plies of described second toner image carried by described toner image carrier.
2. an image forming apparatus, this image forming apparatus comprises:
Use the first image forming portion of the toner containing flat pigment;
Use not containing the second image forming portion of the toner of flat pigment; With
Fixation part, this fixation part by the first toner image formed in described first image forming portion and the second toner image of being formed in described second image forming portion fixing on recording medium,
Wherein, described image forming apparatus has the pattern meeting relation Bm>Bc, wherein Bm represents the glossiness of fixing described first toner image to described recording medium in described fixation part, and Bc represents the glossiness of fixing described second toner image to described recording medium in described fixation part.
3. image forming apparatus according to claim 1,
Wherein, described first image forming portion and described second image forming portion include the latent image carrier for forming toner image; And
Wherein, set toner number of plies Am and Ac by the unit area toner quality controlled in the toner image on each latent image carrier, make it meet described relation Am<Ac.
4. image forming apparatus according to claim 2,
Wherein, set described glossiness Bm and Bc by the unit area toner quality controlled in the toner image on described recording medium, make it meet described relation Bm>Bc.
5. image forming apparatus according to claim 3,
Wherein, described first image forming portion and described second image forming portion include developing member, this developing member by the image development be formed on described latent image carrier to obtain toner image; And
Wherein, by changing the unit area toner quality in toner image that the electromotive force being applied to the developing bias voltage of described developing member controls on described latent image carrier.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2014022311A JP5765454B2 (en) | 2013-05-16 | 2014-02-07 | Image forming apparatus |
| JP2014-022311 | 2014-02-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110865528A (en) * | 2018-08-28 | 2020-03-06 | 柯尼卡美能达株式会社 | Image forming method and printed image |
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| JP2002258618A (en) * | 2001-03-02 | 2002-09-11 | Konica Corp | Image forming device |
| CN1477454A (en) * | 2002-08-20 | 2004-02-25 | 富士施乐株式会社 | Imaging equipment |
| JP2006317632A (en) * | 2005-05-11 | 2006-11-24 | Ricoh Co Ltd | Image forming apparatus, image and image forming method |
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| CN104808457A (en) * | 2014-01-24 | 2015-07-29 | 富士施乐株式会社 | Image forming apparatus |
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| JP2002258618A (en) * | 2001-03-02 | 2002-09-11 | Konica Corp | Image forming device |
| CN1477454A (en) * | 2002-08-20 | 2004-02-25 | 富士施乐株式会社 | Imaging equipment |
| JP2006317632A (en) * | 2005-05-11 | 2006-11-24 | Ricoh Co Ltd | Image forming apparatus, image and image forming method |
| CN103034078A (en) * | 2011-09-28 | 2013-04-10 | 富士施乐株式会社 | Photoluminescent toner, developer, toner cartridge, process cartridge, image forming apparatus, and method for producing the photoluminescent toner |
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| CN110865528A (en) * | 2018-08-28 | 2020-03-06 | 柯尼卡美能达株式会社 | Image forming method and printed image |
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